/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-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 20:25:44,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 20:25:44,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 20:25:44,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 20:25:44,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 20:25:44,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 20:25:44,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 20:25:44,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 20:25:44,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 20:25:44,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 20:25:44,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 20:25:44,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 20:25:44,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 20:25:44,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 20:25:44,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 20:25:44,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 20:25:44,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 20:25:44,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 20:25:44,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 20:25:44,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 20:25:44,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 20:25:44,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 20:25:44,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 20:25:44,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 20:25:44,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 20:25:44,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 20:25:44,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 20:25:44,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 20:25:44,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 20:25:44,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 20:25:44,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 20:25:44,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 20:25:44,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 20:25:44,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 20:25:44,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 20:25:44,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 20:25:44,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 20:25:44,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 20:25:44,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 20:25:44,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 20:25:44,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 20:25:44,921 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-McrAutomaton-WP.epf [2020-09-11 20:25:44,980 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 20:25:44,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 20:25:44,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 20:25:44,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 20:25:44,983 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 20:25:44,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 20:25:44,984 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 20:25:44,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 20:25:44,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 20:25:44,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 20:25:44,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 20:25:44,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 20:25:44,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 20:25:44,985 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 20:25:44,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 20:25:44,985 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 20:25:44,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 20:25:44,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 20:25:44,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 20:25:44,986 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 20:25:44,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 20:25:44,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 20:25:44,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 20:25:44,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 20:25:44,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 20:25:44,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 20:25:44,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 20:25:44,988 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-11 20:25:44,988 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 20:25:44,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 20:25:44,989 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-11 20:25:45,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 20:25:45,498 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 20:25:45,504 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 20:25:45,506 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 20:25:45,507 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 20:25:45,510 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-09-11 20:25:45,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9fb20d8ec/47e6b26f6f4443feb79fbcb0157f4c40/FLAGbef48d806 [2020-09-11 20:25:46,357 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 20:25:46,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-09-11 20:25:46,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9fb20d8ec/47e6b26f6f4443feb79fbcb0157f4c40/FLAGbef48d806 [2020-09-11 20:25:46,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9fb20d8ec/47e6b26f6f4443feb79fbcb0157f4c40 [2020-09-11 20:25:46,624 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 20:25:46,632 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 20:25:46,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 20:25:46,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 20:25:46,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 20:25:46,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:25:46" (1/1) ... [2020-09-11 20:25:46,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f50883f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:46, skipping insertion in model container [2020-09-11 20:25:46,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:25:46" (1/1) ... [2020-09-11 20:25:46,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 20:25:46,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 20:25:47,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 20:25:47,352 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 20:25:47,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 20:25:47,481 INFO L208 MainTranslator]: Completed translation [2020-09-11 20:25:47,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:47 WrapperNode [2020-09-11 20:25:47,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 20:25:47,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 20:25:47,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 20:25:47,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 20:25:47,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:47" (1/1) ... [2020-09-11 20:25:47,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:47" (1/1) ... [2020-09-11 20:25:47,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 20:25:47,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 20:25:47,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 20:25:47,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 20:25:47,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:47" (1/1) ... [2020-09-11 20:25:47,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:47" (1/1) ... [2020-09-11 20:25:47,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:47" (1/1) ... [2020-09-11 20:25:47,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:47" (1/1) ... [2020-09-11 20:25:47,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:47" (1/1) ... [2020-09-11 20:25:47,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:47" (1/1) ... [2020-09-11 20:25:47,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:47" (1/1) ... [2020-09-11 20:25:47,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 20:25:47,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 20:25:47,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 20:25:47,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 20:25:47,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:47" (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 20:25:47,676 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 20:25:47,677 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 20:25:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 20:25:47,677 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 20:25:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 20:25:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 20:25:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 20:25:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 20:25:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 20:25:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 20:25:47,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 20:25:47,682 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 20:25:48,137 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 20:25:48,137 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 20:25:48,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:25:48 BoogieIcfgContainer [2020-09-11 20:25:48,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 20:25:48,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 20:25:48,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 20:25:48,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 20:25:48,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:25:46" (1/3) ... [2020-09-11 20:25:48,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5027e7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:25:48, skipping insertion in model container [2020-09-11 20:25:48,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:47" (2/3) ... [2020-09-11 20:25:48,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5027e7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:25:48, skipping insertion in model container [2020-09-11 20:25:48,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:25:48" (3/3) ... [2020-09-11 20:25:48,155 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-09-11 20:25:48,169 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 20:25:48,169 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 20:25:48,182 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 20:25:48,184 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 20:25:48,216 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,217 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,217 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,217 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,218 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,218 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,219 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,219 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,219 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,220 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,220 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,220 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,220 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,221 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,221 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,221 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,222 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,222 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,222 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,223 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,223 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,223 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,223 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,224 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,224 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,224 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,224 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,225 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,230 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,230 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,231 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,231 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,231 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,231 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,239 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,239 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,239 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,240 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:48,263 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 20:25:48,288 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 20:25:48,288 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 20:25:48,288 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 20:25:48,289 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-11 20:25:48,289 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 20:25:48,289 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 20:25:48,289 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 20:25:48,289 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 20:25:48,308 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-11 20:25:48,311 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 20:25:48,358 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 20:25:48,359 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 20:25:48,366 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 20:25:48,370 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 20:25:48,389 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 20:25:48,389 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 20:25:48,390 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 20:25:48,393 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-11 20:25:48,395 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 20:25:49,448 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-11 20:25:49,688 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-11 20:25:49,689 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-11 20:25:49,696 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 20:25:49,712 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 20:25:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 20:25:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 20:25:49,725 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:49,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 20:25:49,727 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:49,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-11 20:25:49,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:49,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213041489] [2020-09-11 20:25:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:50,088 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 20:25:50,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213041489] [2020-09-11 20:25:50,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:25:50,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 20:25:50,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1346100237] [2020-09-11 20:25:50,094 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:50,098 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:50,118 INFO L274 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-09-11 20:25:50,118 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:50,121 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 20:25:50,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 20:25:50,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:50,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 20:25:50,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 20:25:50,147 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 20:25:50,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:50,262 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-11 20:25:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 20:25:50,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 20:25:50,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:50,286 INFO L225 Difference]: With dead ends: 75 [2020-09-11 20:25:50,287 INFO L226 Difference]: Without dead ends: 42 [2020-09-11 20:25:50,289 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 20:25:50,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-11 20:25:50,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-11 20:25:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:50,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-11 20:25:50,360 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-11 20:25:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:50,361 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-11 20:25:50,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 20:25:50,361 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-11 20:25:50,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 20:25:50,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:50,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:50,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 20:25:50,364 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:50,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:50,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-11 20:25:50,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:50,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245553383] [2020-09-11 20:25:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:50,499 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 20:25:50,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245553383] [2020-09-11 20:25:50,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:25:50,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 20:25:50,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1562504700] [2020-09-11 20:25:50,500 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:50,501 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:50,505 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-09-11 20:25:50,505 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:50,537 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 20:25:50,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 20:25:50,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:50,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 20:25:50,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 20:25:50,540 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-11 20:25:50,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:50,575 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-11 20:25:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 20:25:50,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 20:25:50,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:50,577 INFO L225 Difference]: With dead ends: 56 [2020-09-11 20:25:50,578 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 20:25:50,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 20:25:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 20:25:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 20:25:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-11 20:25:50,587 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-11 20:25:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:50,589 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-11 20:25:50,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 20:25:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-11 20:25:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 20:25:50,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:50,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:50,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 20:25:50,591 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:50,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-11 20:25:50,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:50,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499203086] [2020-09-11 20:25:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:50,703 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 20:25:50,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499203086] [2020-09-11 20:25:50,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:25:50,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 20:25:50,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [103086808] [2020-09-11 20:25:50,705 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:50,706 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:50,710 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-09-11 20:25:50,710 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:50,754 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:50,755 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:50,775 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:25:50,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 20:25:50,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:50,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 20:25:50,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-11 20:25:50,776 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-09-11 20:25:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:50,937 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-09-11 20:25:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 20:25:50,939 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-09-11 20:25:50,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:50,940 INFO L225 Difference]: With dead ends: 62 [2020-09-11 20:25:50,941 INFO L226 Difference]: Without dead ends: 44 [2020-09-11 20:25:50,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:25:50,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-11 20:25:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-09-11 20:25:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 20:25:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-11 20:25:50,949 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-09-11 20:25:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:50,949 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-11 20:25:50,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 20:25:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-11 20:25:50,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 20:25:50,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:50,950 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:50,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 20:25:50,951 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:50,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:50,951 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-09-11 20:25:50,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:50,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975110890] [2020-09-11 20:25:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:51,102 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 20:25:51,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975110890] [2020-09-11 20:25:51,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16345148] [2020-09-11 20:25:51,104 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 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 20:25:51,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:25:51,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:51,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 20:25:51,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:51,243 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 20:25:51,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:51,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 20:25:51,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1287228556] [2020-09-11 20:25:51,245 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:51,246 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:51,249 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-09-11 20:25:51,250 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:51,270 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:51,271 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:51,297 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:51,297 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:51,314 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:51,315 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:51,328 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:51,328 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:51,354 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:51,354 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:51,358 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:51,358 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:51,377 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:51,377 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:51,389 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:51,390 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:51,398 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-11 20:25:51,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 20:25:51,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:51,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 20:25:51,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 20:25:51,400 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-09-11 20:25:51,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:51,569 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-09-11 20:25:51,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 20:25:51,569 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 20:25:51,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:51,571 INFO L225 Difference]: With dead ends: 56 [2020-09-11 20:25:51,571 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 20:25:51,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:25:51,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 20:25:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 20:25:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-09-11 20:25:51,589 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-09-11 20:25:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:51,589 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-09-11 20:25:51,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 20:25:51,590 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-09-11 20:25:51,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 20:25:51,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:51,592 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:51,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:51,807 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:51,807 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-09-11 20:25:51,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:51,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661058661] [2020-09-11 20:25:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:51,916 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 20:25:51,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661058661] [2020-09-11 20:25:51,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333823076] [2020-09-11 20:25:51,917 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 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 20:25:51,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 20:25:51,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:51,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 20:25:52,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:52,024 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 20:25:52,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:52,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 20:25:52,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [311015515] [2020-09-11 20:25:52,025 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:52,026 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:52,029 INFO L274 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-09-11 20:25:52,029 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:52,046 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:52,047 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:52,085 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:52,086 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:52,087 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-11 20:25:52,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 20:25:52,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:52,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 20:25:52,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-11 20:25:52,089 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-09-11 20:25:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:52,300 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-09-11 20:25:52,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 20:25:52,301 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 20:25:52,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:52,302 INFO L225 Difference]: With dead ends: 66 [2020-09-11 20:25:52,302 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 20:25:52,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:25:52,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 20:25:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-09-11 20:25:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 20:25:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-09-11 20:25:52,309 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-09-11 20:25:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:52,310 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-09-11 20:25:52,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 20:25:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-09-11 20:25:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 20:25:52,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:52,311 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:52,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:52,526 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:52,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:52,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-09-11 20:25:52,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:52,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943693276] [2020-09-11 20:25:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:52,672 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 20:25:52,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943693276] [2020-09-11 20:25:52,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597445138] [2020-09-11 20:25:52,674 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 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 20:25:52,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:25:52,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 20:25:52,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:52,754 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 20:25:52,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:52,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 20:25:52,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1233376285] [2020-09-11 20:25:52,755 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:52,757 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:52,760 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-09-11 20:25:52,761 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:52,768 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:52,768 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:52,816 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:52,816 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:52,835 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:25:52,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 20:25:52,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:52,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 20:25:52,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-11 20:25:52,837 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-09-11 20:25:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:53,006 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-09-11 20:25:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 20:25:53,007 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 20:25:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:53,008 INFO L225 Difference]: With dead ends: 64 [2020-09-11 20:25:53,008 INFO L226 Difference]: Without dead ends: 58 [2020-09-11 20:25:53,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-11 20:25:53,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-11 20:25:53,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-11 20:25:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 20:25:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-09-11 20:25:53,016 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-09-11 20:25:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:53,016 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-09-11 20:25:53,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 20:25:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-09-11 20:25:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 20:25:53,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:53,018 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:53,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:53,228 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:53,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:53,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-09-11 20:25:53,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:53,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595107058] [2020-09-11 20:25:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:53,313 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 20:25:53,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595107058] [2020-09-11 20:25:53,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522582231] [2020-09-11 20:25:53,314 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 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 20:25:53,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:25:53,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:53,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 20:25:53,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:53,434 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 20:25:53,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:53,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 20:25:53,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [860040924] [2020-09-11 20:25:53,435 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:53,438 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:53,441 INFO L274 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-09-11 20:25:53,441 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:53,490 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:53,490 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:53,543 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:53,544 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:53,548 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:25:53,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 20:25:53,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:53,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 20:25:53,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-11 20:25:53,550 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-09-11 20:25:53,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:53,780 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-09-11 20:25:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 20:25:53,781 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 20:25:53,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:53,782 INFO L225 Difference]: With dead ends: 63 [2020-09-11 20:25:53,782 INFO L226 Difference]: Without dead ends: 51 [2020-09-11 20:25:53,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-09-11 20:25:53,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-11 20:25:53,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-09-11 20:25:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 20:25:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-11 20:25:53,788 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-09-11 20:25:53,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:53,789 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-11 20:25:53,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 20:25:53,789 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-11 20:25:53,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 20:25:53,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:53,790 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:53,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:54,000 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-09-11 20:25:54,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:54,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537646119] [2020-09-11 20:25:54,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:54,117 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 20:25:54,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537646119] [2020-09-11 20:25:54,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222056713] [2020-09-11 20:25:54,118 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 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 20:25:54,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 20:25:54,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 20:25:54,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:54,189 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 20:25:54,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:54,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 20:25:54,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1466158640] [2020-09-11 20:25:54,191 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:54,192 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:54,196 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-09-11 20:25:54,196 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:54,215 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,215 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,240 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,240 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,257 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,257 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,266 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,267 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,288 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,288 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,291 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,292 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,308 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,308 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,319 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,320 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,330 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-11 20:25:54,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 20:25:54,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:54,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 20:25:54,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 20:25:54,332 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-09-11 20:25:54,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:54,535 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-09-11 20:25:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 20:25:54,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 20:25:54,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:54,538 INFO L225 Difference]: With dead ends: 60 [2020-09-11 20:25:54,538 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 20:25:54,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:25:54,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 20:25:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-11 20:25:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 20:25:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 20:25:54,544 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-09-11 20:25:54,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:54,545 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 20:25:54,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 20:25:54,545 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 20:25:54,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 20:25:54,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:54,546 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:54,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:54,760 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-09-11 20:25:54,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:54,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911398151] [2020-09-11 20:25:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:54,867 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 20:25:54,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911398151] [2020-09-11 20:25:54,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85531836] [2020-09-11 20:25:54,869 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 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 20:25:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:54,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 20:25:54,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:54,952 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 20:25:54,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:54,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 20:25:54,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1888599623] [2020-09-11 20:25:54,954 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:54,955 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:54,959 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-11 20:25:54,959 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:54,961 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,961 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,998 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,998 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:55,029 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-11 20:25:55,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 20:25:55,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:55,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 20:25:55,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-11 20:25:55,031 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-09-11 20:25:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:55,369 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-11 20:25:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:25:55,370 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 20:25:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:55,371 INFO L225 Difference]: With dead ends: 74 [2020-09-11 20:25:55,371 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 20:25:55,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:25:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 20:25:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-11 20:25:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 20:25:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-09-11 20:25:55,387 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-09-11 20:25:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:55,387 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-09-11 20:25:55,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 20:25:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-09-11 20:25:55,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 20:25:55,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:55,388 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:55,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:55,605 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:55,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:55,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-09-11 20:25:55,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:55,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336279212] [2020-09-11 20:25:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:55,698 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 20:25:55,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336279212] [2020-09-11 20:25:55,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737368560] [2020-09-11 20:25:55,700 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 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 20:25:55,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:25:55,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:55,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 20:25:55,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:55,790 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 20:25:55,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:55,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 20:25:55,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1628788797] [2020-09-11 20:25:55,791 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:55,797 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:55,801 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-11 20:25:55,801 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:55,804 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:55,805 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:55,840 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:55,841 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:55,886 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:25:55,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 20:25:55,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:55,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 20:25:55,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 20:25:55,888 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-09-11 20:25:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:56,213 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-09-11 20:25:56,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 20:25:56,214 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 20:25:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:56,216 INFO L225 Difference]: With dead ends: 74 [2020-09-11 20:25:56,216 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 20:25:56,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:25:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 20:25:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-09-11 20:25:56,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-11 20:25:56,222 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-09-11 20:25:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:56,222 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-11 20:25:56,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 20:25:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-11 20:25:56,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 20:25:56,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:56,223 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:56,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-11 20:25:56,437 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:56,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:56,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-09-11 20:25:56,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:56,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754620886] [2020-09-11 20:25:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:56,582 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 20:25:56,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754620886] [2020-09-11 20:25:56,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067100871] [2020-09-11 20:25:56,583 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 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 20:25:56,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 20:25:56,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:56,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 20:25:56,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:56,682 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 20:25:56,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:56,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 20:25:56,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1819995253] [2020-09-11 20:25:56,685 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:56,688 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:56,693 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-09-11 20:25:56,693 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:56,695 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:56,695 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:56,756 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:56,756 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:56,784 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:25:56,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 20:25:56,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:56,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 20:25:56,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 20:25:56,785 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-09-11 20:25:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:57,093 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-09-11 20:25:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 20:25:57,094 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 20:25:57,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:57,096 INFO L225 Difference]: With dead ends: 70 [2020-09-11 20:25:57,096 INFO L226 Difference]: Without dead ends: 64 [2020-09-11 20:25:57,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:25:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-11 20:25:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-09-11 20:25:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 20:25:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-09-11 20:25:57,113 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-09-11 20:25:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:57,116 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-09-11 20:25:57,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 20:25:57,116 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-09-11 20:25:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 20:25:57,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:57,117 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:57,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-11 20:25:57,318 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:57,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-09-11 20:25:57,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:57,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540175904] [2020-09-11 20:25:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:57,450 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 20:25:57,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540175904] [2020-09-11 20:25:57,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239536576] [2020-09-11 20:25:57,453 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 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 20:25:57,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:25:57,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:57,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 20:25:57,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:57,524 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 20:25:57,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:57,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 20:25:57,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [867461558] [2020-09-11 20:25:57,525 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:57,527 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:57,531 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-11 20:25:57,531 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:57,533 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:57,533 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:57,577 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:57,577 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:57,598 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:25:57,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 20:25:57,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:57,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 20:25:57,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-11 20:25:57,599 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-09-11 20:25:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:57,913 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-11 20:25:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:25:57,915 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 20:25:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:57,916 INFO L225 Difference]: With dead ends: 69 [2020-09-11 20:25:57,916 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 20:25:57,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-09-11 20:25:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 20:25:57,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-09-11 20:25:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 20:25:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-09-11 20:25:57,928 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-09-11 20:25:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:57,928 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-09-11 20:25:57,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 20:25:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-09-11 20:25:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 20:25:57,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:57,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:58,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:58,141 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:58,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:58,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-09-11 20:25:58,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:58,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479107559] [2020-09-11 20:25:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:58,228 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 20:25:58,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479107559] [2020-09-11 20:25:58,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128616498] [2020-09-11 20:25:58,229 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 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 20:25:58,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 20:25:58,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 20:25:58,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:58,307 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 20:25:58,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:58,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 20:25:58,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1540733552] [2020-09-11 20:25:58,308 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:58,310 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:58,312 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-11 20:25:58,312 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:58,313 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:58,313 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:58,345 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:58,346 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:58,360 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:25:58,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 20:25:58,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:58,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 20:25:58,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 20:25:58,362 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-09-11 20:25:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:58,690 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-09-11 20:25:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 20:25:58,691 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 20:25:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:58,692 INFO L225 Difference]: With dead ends: 69 [2020-09-11 20:25:58,692 INFO L226 Difference]: Without dead ends: 57 [2020-09-11 20:25:58,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:25:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-11 20:25:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-09-11 20:25:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-11 20:25:58,696 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-09-11 20:25:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:58,696 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-11 20:25:58,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 20:25:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-11 20:25:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:25:58,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:58,697 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:58,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:58,906 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:58,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:58,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-09-11 20:25:58,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:58,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542274753] [2020-09-11 20:25:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:59,032 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 20:25:59,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542274753] [2020-09-11 20:25:59,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835623138] [2020-09-11 20:25:59,033 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 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 20:25:59,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 20:25:59,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:59,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:25:59,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:59,127 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 20:25:59,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:59,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 20:25:59,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [196741597] [2020-09-11 20:25:59,128 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:59,129 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:59,132 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-09-11 20:25:59,133 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:59,143 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,144 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,162 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,162 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,176 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,176 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,183 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,183 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,199 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,199 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,201 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,202 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,217 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,217 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,223 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,223 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,231 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-11 20:25:59,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:25:59,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:59,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:25:59,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:25:59,232 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-09-11 20:25:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:59,483 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-09-11 20:25:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:25:59,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 20:25:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:59,486 INFO L225 Difference]: With dead ends: 66 [2020-09-11 20:25:59,486 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 20:25:59,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:25:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 20:25:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-11 20:25:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 20:25:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-11 20:25:59,490 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-09-11 20:25:59,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:59,490 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-11 20:25:59,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:25:59,490 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-11 20:25:59,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:25:59,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:59,491 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:59,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-11 20:25:59,702 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:59,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:59,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-09-11 20:25:59,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:59,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097470100] [2020-09-11 20:25:59,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:59,822 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 20:25:59,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097470100] [2020-09-11 20:25:59,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466168194] [2020-09-11 20:25:59,824 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 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 20:25:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:59,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:25:59,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:59,910 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 20:25:59,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:59,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 20:25:59,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [719467801] [2020-09-11 20:25:59,911 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:59,914 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:59,917 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-11 20:25:59,918 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:59,919 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,919 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,959 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,959 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,974 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-11 20:25:59,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:25:59,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:59,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:25:59,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:25:59,975 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-09-11 20:26:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:00,332 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-09-11 20:26:00,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:26:00,332 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 20:26:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:00,333 INFO L225 Difference]: With dead ends: 82 [2020-09-11 20:26:00,333 INFO L226 Difference]: Without dead ends: 76 [2020-09-11 20:26:00,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:26:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-11 20:26:00,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-11 20:26:00,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 20:26:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-09-11 20:26:00,345 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-09-11 20:26:00,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:00,346 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-09-11 20:26:00,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:26:00,346 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-09-11 20:26:00,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:26:00,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:00,347 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:00,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 20:26:00,548 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:00,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:00,549 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-09-11 20:26:00,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:00,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892835616] [2020-09-11 20:26:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:00,654 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 20:26:00,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892835616] [2020-09-11 20:26:00,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601508683] [2020-09-11 20:26:00,655 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 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 20:26:00,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:26:00,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:00,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:26:00,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:00,737 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 20:26:00,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:00,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 20:26:00,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1218641825] [2020-09-11 20:26:00,738 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:00,740 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:00,743 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-11 20:26:00,743 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:00,764 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:00,765 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:00,795 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:00,796 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:00,797 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:26:00,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:26:00,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:26:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:26:00,798 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-09-11 20:26:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:01,245 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-11 20:26:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:26:01,246 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 20:26:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:01,246 INFO L225 Difference]: With dead ends: 81 [2020-09-11 20:26:01,247 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 20:26:01,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-11 20:26:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 20:26:01,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-11 20:26:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 20:26:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-09-11 20:26:01,250 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-09-11 20:26:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:01,251 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-09-11 20:26:01,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:26:01,251 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-09-11 20:26:01,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:26:01,252 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:01,252 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:01,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 20:26:01,453 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:01,454 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-09-11 20:26:01,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:01,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379050866] [2020-09-11 20:26:01,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:01,554 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 20:26:01,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379050866] [2020-09-11 20:26:01,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707277296] [2020-09-11 20:26:01,555 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 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 20:26:01,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 20:26:01,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:01,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:26:01,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:01,631 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 20:26:01,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:01,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 20:26:01,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2060446941] [2020-09-11 20:26:01,632 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:01,633 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:01,635 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-11 20:26:01,635 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:01,636 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:01,636 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:01,670 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:01,670 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:01,681 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:26:01,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:26:01,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:01,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:26:01,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:26:01,682 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-09-11 20:26:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:02,144 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-09-11 20:26:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 20:26:02,145 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 20:26:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:02,146 INFO L225 Difference]: With dead ends: 82 [2020-09-11 20:26:02,146 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 20:26:02,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-11 20:26:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 20:26:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-09-11 20:26:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 20:26:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-11 20:26:02,150 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-09-11 20:26:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:02,150 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-11 20:26:02,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:26:02,151 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-11 20:26:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 20:26:02,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:02,151 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:02,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:02,360 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:02,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:02,361 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-09-11 20:26:02,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:02,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239039903] [2020-09-11 20:26:02,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:02,499 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 20:26:02,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239039903] [2020-09-11 20:26:02,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524391997] [2020-09-11 20:26:02,500 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 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 20:26:02,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:26:02,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:02,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:26:02,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:02,576 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 20:26:02,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:02,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 20:26:02,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [263785016] [2020-09-11 20:26:02,577 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:02,579 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:02,582 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-09-11 20:26:02,582 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:02,601 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:02,602 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:02,639 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:02,639 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:02,640 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:26:02,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:26:02,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:02,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:26:02,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:26:02,642 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-09-11 20:26:02,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:02,897 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-11 20:26:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:26:02,898 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 20:26:02,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:02,899 INFO L225 Difference]: With dead ends: 78 [2020-09-11 20:26:02,899 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 20:26:02,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:26:02,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 20:26:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-09-11 20:26:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 20:26:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-09-11 20:26:02,903 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-09-11 20:26:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:02,904 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-09-11 20:26:02,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:26:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-09-11 20:26:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 20:26:02,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:02,905 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:03,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 20:26:03,109 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:03,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-09-11 20:26:03,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:03,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056868893] [2020-09-11 20:26:03,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:03,280 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 20:26:03,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056868893] [2020-09-11 20:26:03,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190851622] [2020-09-11 20:26:03,280 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 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 20:26:03,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 20:26:03,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:03,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:26:03,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:03,361 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 20:26:03,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:03,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 20:26:03,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [752820710] [2020-09-11 20:26:03,362 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:03,364 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:03,367 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-11 20:26:03,368 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:03,369 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:03,370 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:03,411 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:03,411 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:03,432 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:26:03,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:26:03,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:03,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:26:03,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:26:03,434 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-09-11 20:26:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:03,782 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-09-11 20:26:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:26:03,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 20:26:03,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:03,783 INFO L225 Difference]: With dead ends: 75 [2020-09-11 20:26:03,783 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 20:26:03,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-11 20:26:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 20:26:03,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-11 20:26:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 20:26:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-11 20:26:03,788 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-09-11 20:26:03,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:03,788 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-11 20:26:03,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:26:03,788 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-11 20:26:03,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 20:26:03,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:03,789 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:03,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:03,999 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:04,000 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-09-11 20:26:04,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:04,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734857134] [2020-09-11 20:26:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:04,116 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 20:26:04,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734857134] [2020-09-11 20:26:04,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5130556] [2020-09-11 20:26:04,116 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 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 20:26:04,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 20:26:04,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:04,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:26:04,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:04,198 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 20:26:04,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:04,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 20:26:04,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [329332045] [2020-09-11 20:26:04,199 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:04,200 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:04,203 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-11 20:26:04,203 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:04,204 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:04,204 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:04,250 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:04,250 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:04,265 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:26:04,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:26:04,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:04,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:26:04,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:26:04,266 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-09-11 20:26:04,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:04,707 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-09-11 20:26:04,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:26:04,707 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 20:26:04,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:04,709 INFO L225 Difference]: With dead ends: 75 [2020-09-11 20:26:04,709 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 20:26:04,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-11 20:26:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 20:26:04,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-09-11 20:26:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 20:26:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-09-11 20:26:04,712 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-09-11 20:26:04,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:04,713 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-09-11 20:26:04,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:26:04,713 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-09-11 20:26:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 20:26:04,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:04,714 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:04,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:04,921 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:04,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:04,922 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-09-11 20:26:04,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:04,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548984984] [2020-09-11 20:26:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:05,033 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 20:26:05,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548984984] [2020-09-11 20:26:05,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68903999] [2020-09-11 20:26:05,034 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 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 20:26:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:05,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:26:05,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:05,120 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 20:26:05,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:05,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 20:26:05,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [911598337] [2020-09-11 20:26:05,121 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:05,123 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:05,125 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-11 20:26:05,126 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:05,143 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:05,144 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:05,210 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:05,210 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:05,211 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:26:05,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:26:05,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:05,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:26:05,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:26:05,212 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-09-11 20:26:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:05,722 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-09-11 20:26:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 20:26:05,723 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 20:26:05,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:05,724 INFO L225 Difference]: With dead ends: 75 [2020-09-11 20:26:05,725 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 20:26:05,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2020-09-11 20:26:05,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 20:26:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-11 20:26:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 20:26:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 20:26:05,730 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-09-11 20:26:05,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:05,730 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 20:26:05,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:26:05,730 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 20:26:05,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:26:05,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:05,731 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:05,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-11 20:26:05,932 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:05,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:05,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-09-11 20:26:05,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:05,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283991589] [2020-09-11 20:26:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:06,116 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 20:26:06,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283991589] [2020-09-11 20:26:06,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441741769] [2020-09-11 20:26:06,117 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 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 20:26:06,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:26:06,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:06,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:26:06,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:06,203 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 20:26:06,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:06,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:26:06,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1706410358] [2020-09-11 20:26:06,204 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:06,205 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:06,209 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-09-11 20:26:06,209 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:06,218 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:06,219 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:06,246 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:06,246 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:06,264 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:06,264 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:06,269 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:06,269 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:06,288 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:06,289 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:06,291 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:06,291 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:06,306 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:06,307 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:06,312 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:06,312 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:06,321 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-11 20:26:06,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:26:06,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:06,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:26:06,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:26:06,322 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-09-11 20:26:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:06,673 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-09-11 20:26:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:26:06,674 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:26:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:06,675 INFO L225 Difference]: With dead ends: 72 [2020-09-11 20:26:06,675 INFO L226 Difference]: Without dead ends: 66 [2020-09-11 20:26:06,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:26:06,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-11 20:26:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-11 20:26:06,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 20:26:06,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-11 20:26:06,681 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-09-11 20:26:06,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:06,682 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-11 20:26:06,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:26:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-11 20:26:06,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:26:06,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:06,683 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:06,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:06,895 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:06,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:06,896 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-09-11 20:26:06,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:06,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824067417] [2020-09-11 20:26:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:07,078 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 20:26:07,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824067417] [2020-09-11 20:26:07,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156843388] [2020-09-11 20:26:07,080 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 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 20:26:07,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 20:26:07,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:07,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:26:07,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:07,193 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 20:26:07,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:07,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:26:07,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1767125699] [2020-09-11 20:26:07,195 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:07,196 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:07,200 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-11 20:26:07,200 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:07,214 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:07,214 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:07,260 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:07,261 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:07,263 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-11 20:26:07,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:26:07,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:07,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:26:07,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:26:07,265 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-09-11 20:26:07,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:07,687 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-09-11 20:26:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:26:07,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:26:07,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:07,689 INFO L225 Difference]: With dead ends: 92 [2020-09-11 20:26:07,689 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 20:26:07,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2020-09-11 20:26:07,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 20:26:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-09-11 20:26:07,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 20:26:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-09-11 20:26:07,693 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-09-11 20:26:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:07,694 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-09-11 20:26:07,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:26:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-09-11 20:26:07,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:26:07,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:07,695 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:07,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 20:26:07,896 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:07,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-09-11 20:26:07,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:07,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390007131] [2020-09-11 20:26:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:08,034 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 20:26:08,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390007131] [2020-09-11 20:26:08,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643647202] [2020-09-11 20:26:08,035 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 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 20:26:08,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:26:08,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:08,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:26:08,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:08,121 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 20:26:08,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:08,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:26:08,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [116391362] [2020-09-11 20:26:08,122 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:08,123 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:08,126 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-11 20:26:08,126 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:08,127 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:08,127 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:08,157 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:08,157 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:08,167 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:26:08,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:26:08,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:08,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:26:08,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:26:08,169 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-09-11 20:26:08,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:08,639 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-09-11 20:26:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 20:26:08,639 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:26:08,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:08,640 INFO L225 Difference]: With dead ends: 89 [2020-09-11 20:26:08,640 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 20:26:08,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-11 20:26:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 20:26:08,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-09-11 20:26:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 20:26:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-09-11 20:26:08,644 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-09-11 20:26:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:08,644 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-09-11 20:26:08,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:26:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-09-11 20:26:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:26:08,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:08,645 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:08,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 20:26:08,855 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:08,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:08,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-09-11 20:26:08,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:08,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908993178] [2020-09-11 20:26:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:08,983 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 20:26:08,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908993178] [2020-09-11 20:26:08,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586927928] [2020-09-11 20:26:08,984 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 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 20:26:09,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 20:26:09,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:09,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:26:09,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:09,052 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 20:26:09,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:09,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:26:09,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [639195292] [2020-09-11 20:26:09,053 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:09,055 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:09,058 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-11 20:26:09,058 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:09,072 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:09,072 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:09,101 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:09,101 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:09,105 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:26:09,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:26:09,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:09,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:26:09,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:26:09,106 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-09-11 20:26:09,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:09,685 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-09-11 20:26:09,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 20:26:09,686 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:26:09,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:09,687 INFO L225 Difference]: With dead ends: 89 [2020-09-11 20:26:09,687 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 20:26:09,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 20:26:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 20:26:09,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-11 20:26:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 20:26:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-09-11 20:26:09,690 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-09-11 20:26:09,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:09,690 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-09-11 20:26:09,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:26:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-09-11 20:26:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:26:09,692 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:09,692 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:09,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:09,900 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:09,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-09-11 20:26:09,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:09,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576132270] [2020-09-11 20:26:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:10,039 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 20:26:10,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576132270] [2020-09-11 20:26:10,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196455502] [2020-09-11 20:26:10,040 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 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 20:26:10,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 20:26:10,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:10,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:26:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:10,130 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 20:26:10,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:10,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:26:10,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1074059919] [2020-09-11 20:26:10,131 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:10,161 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:10,164 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-11 20:26:10,165 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:10,181 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:10,181 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:10,227 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:10,228 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:10,229 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:26:10,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:26:10,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:10,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:26:10,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:26:10,230 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-09-11 20:26:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:10,839 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-09-11 20:26:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 20:26:10,840 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:26:10,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:10,841 INFO L225 Difference]: With dead ends: 90 [2020-09-11 20:26:10,841 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 20:26:10,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 20:26:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 20:26:10,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-09-11 20:26:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 20:26:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-11 20:26:10,844 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-09-11 20:26:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:10,845 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-11 20:26:10,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:26:10,845 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-11 20:26:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 20:26:10,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:10,845 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:11,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 20:26:11,054 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:11,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-09-11 20:26:11,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:11,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743011819] [2020-09-11 20:26:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:11,230 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 20:26:11,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743011819] [2020-09-11 20:26:11,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645028552] [2020-09-11 20:26:11,230 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 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 20:26:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:11,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 20:26:11,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:11,309 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 20:26:11,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:11,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 20:26:11,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1691461077] [2020-09-11 20:26:11,310 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:11,311 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:11,315 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-09-11 20:26:11,315 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:11,332 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:11,332 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:11,387 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:11,387 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:11,390 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6427#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:26:11,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 20:26:11,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:11,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 20:26:11,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 20:26:11,391 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 15 states. [2020-09-11 20:26:11,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:11,746 INFO L93 Difference]: Finished difference Result 86 states and 198 transitions. [2020-09-11 20:26:11,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:26:11,747 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 20:26:11,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:11,748 INFO L225 Difference]: With dead ends: 86 [2020-09-11 20:26:11,748 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 20:26:11,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2020-09-11 20:26:11,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 20:26:11,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-11 20:26:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 20:26:11,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 140 transitions. [2020-09-11 20:26:11,753 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 140 transitions. Word has length 18 [2020-09-11 20:26:11,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:11,754 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 140 transitions. [2020-09-11 20:26:11,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 20:26:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 140 transitions. [2020-09-11 20:26:11,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 20:26:11,755 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:11,755 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:11,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:11,956 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:11,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 26 times [2020-09-11 20:26:11,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:11,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356661796] [2020-09-11 20:26:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:12,158 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 20:26:12,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356661796] [2020-09-11 20:26:12,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748897936] [2020-09-11 20:26:12,159 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 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 20:26:12,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:26:12,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 20:26:12,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:12,252 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 20:26:12,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:12,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 20:26:12,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1817253590] [2020-09-11 20:26:12,254 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:12,257 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:12,263 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-11 20:26:12,263 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:12,265 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:12,265 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:12,314 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:12,315 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:12,333 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6719#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:26:12,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 20:26:12,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:12,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 20:26:12,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-11 20:26:12,335 INFO L87 Difference]: Start difference. First operand 57 states and 140 transitions. Second operand 15 states. [2020-09-11 20:26:12,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:12,894 INFO L93 Difference]: Finished difference Result 83 states and 194 transitions. [2020-09-11 20:26:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:26:12,895 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 20:26:12,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:12,896 INFO L225 Difference]: With dead ends: 83 [2020-09-11 20:26:12,897 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 20:26:12,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2020-09-11 20:26:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 20:26:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-09-11 20:26:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 20:26:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 146 transitions. [2020-09-11 20:26:12,902 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 146 transitions. Word has length 18 [2020-09-11 20:26:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:12,902 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 146 transitions. [2020-09-11 20:26:12,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 20:26:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 146 transitions. [2020-09-11 20:26:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 20:26:12,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:12,903 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:13,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 20:26:13,104 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:13,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 27 times [2020-09-11 20:26:13,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:13,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785881046] [2020-09-11 20:26:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:13,285 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 20:26:13,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785881046] [2020-09-11 20:26:13,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013787738] [2020-09-11 20:26:13,286 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 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 20:26:13,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 20:26:13,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:13,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 20:26:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:13,367 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 20:26:13,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:13,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 20:26:13,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1002441087] [2020-09-11 20:26:13,368 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:13,369 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:13,372 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-11 20:26:13,372 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:13,390 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:13,390 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:13,439 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:13,440 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:13,442 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7016#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:26:13,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 20:26:13,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:13,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 20:26:13,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-11 20:26:13,444 INFO L87 Difference]: Start difference. First operand 59 states and 146 transitions. Second operand 15 states. [2020-09-11 20:26:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:13,979 INFO L93 Difference]: Finished difference Result 81 states and 192 transitions. [2020-09-11 20:26:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 20:26:13,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 20:26:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:13,984 INFO L225 Difference]: With dead ends: 81 [2020-09-11 20:26:13,984 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 20:26:13,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2020-09-11 20:26:13,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 20:26:13,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-09-11 20:26:13,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 20:26:13,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 152 transitions. [2020-09-11 20:26:13,990 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 152 transitions. Word has length 18 [2020-09-11 20:26:13,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:13,990 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 152 transitions. [2020-09-11 20:26:13,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 20:26:13,990 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 152 transitions. [2020-09-11 20:26:13,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 20:26:13,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:13,991 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:14,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 20:26:14,201 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:14,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:14,202 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 28 times [2020-09-11 20:26:14,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:14,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580545646] [2020-09-11 20:26:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:14,342 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 20:26:14,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580545646] [2020-09-11 20:26:14,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338414238] [2020-09-11 20:26:14,342 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 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 20:26:14,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:26:14,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:14,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 20:26:14,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:14,452 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 20:26:14,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:14,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 20:26:14,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [891648597] [2020-09-11 20:26:14,456 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:14,460 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:14,466 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-11 20:26:14,466 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:14,485 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:14,486 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:14,530 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:14,531 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:14,532 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7319#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:26:14,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 20:26:14,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:14,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 20:26:14,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-11 20:26:14,533 INFO L87 Difference]: Start difference. First operand 61 states and 152 transitions. Second operand 15 states. [2020-09-11 20:26:15,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:15,179 INFO L93 Difference]: Finished difference Result 81 states and 195 transitions. [2020-09-11 20:26:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 20:26:15,180 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 20:26:15,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:15,181 INFO L225 Difference]: With dead ends: 81 [2020-09-11 20:26:15,182 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 20:26:15,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 20:26:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 20:26:15,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-09-11 20:26:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 20:26:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-09-11 20:26:15,193 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 18 [2020-09-11 20:26:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:15,193 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-09-11 20:26:15,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 20:26:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-09-11 20:26:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 20:26:15,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:15,194 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:15,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:15,409 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:15,410 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 29 times [2020-09-11 20:26:15,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:15,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154881755] [2020-09-11 20:26:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:15,561 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 20:26:15,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154881755] [2020-09-11 20:26:15,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123154934] [2020-09-11 20:26:15,562 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 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 20:26:15,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 20:26:15,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:15,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 20:26:15,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:15,636 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 20:26:15,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:15,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 20:26:15,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [316573641] [2020-09-11 20:26:15,637 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:15,639 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:15,642 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-11 20:26:15,643 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:15,654 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:15,655 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:15,686 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:15,686 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:15,687 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7630#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-11 20:26:15,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 20:26:15,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:15,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 20:26:15,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 20:26:15,688 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 15 states. [2020-09-11 20:26:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:16,366 INFO L93 Difference]: Finished difference Result 81 states and 203 transitions. [2020-09-11 20:26:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 20:26:16,370 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 20:26:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:16,372 INFO L225 Difference]: With dead ends: 81 [2020-09-11 20:26:16,372 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 20:26:16,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 20:26:16,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 20:26:16,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2020-09-11 20:26:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 20:26:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-11 20:26:16,375 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 18 [2020-09-11 20:26:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:16,375 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-11 20:26:16,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 20:26:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-11 20:26:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 20:26:16,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:16,376 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:16,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:16,586 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:16,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:16,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 30 times [2020-09-11 20:26:16,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:16,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402184218] [2020-09-11 20:26:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:16,797 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 20:26:16,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402184218] [2020-09-11 20:26:16,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845603536] [2020-09-11 20:26:16,798 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 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 20:26:16,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 20:26:16,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:16,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 20:26:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:16,882 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 20:26:16,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:16,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 20:26:16,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1005671220] [2020-09-11 20:26:16,883 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:16,885 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:16,890 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2020-09-11 20:26:16,890 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:16,901 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:16,902 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:16,923 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:16,923 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:16,935 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:16,936 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:16,949 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:16,950 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:16,965 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:16,965 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:16,967 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:16,967 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:16,983 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:16,983 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:16,990 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:16,990 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:16,999 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7923#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-11 20:26:16,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 20:26:16,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:16,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 20:26:17,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-11 20:26:17,000 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 16 states. [2020-09-11 20:26:17,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:17,362 INFO L93 Difference]: Finished difference Result 78 states and 182 transitions. [2020-09-11 20:26:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:26:17,363 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 20:26:17,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:17,364 INFO L225 Difference]: With dead ends: 78 [2020-09-11 20:26:17,364 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 20:26:17,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2020-09-11 20:26:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 20:26:17,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-11 20:26:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 20:26:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-11 20:26:17,372 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 19 [2020-09-11 20:26:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:17,372 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-11 20:26:17,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 20:26:17,375 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-11 20:26:17,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 20:26:17,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:17,376 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:17,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 20:26:17,588 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:17,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 31 times [2020-09-11 20:26:17,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:17,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305274418] [2020-09-11 20:26:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:17,765 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 20:26:17,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305274418] [2020-09-11 20:26:17,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798198001] [2020-09-11 20:26:17,765 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 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 20:26:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:17,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 20:26:17,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:17,835 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 20:26:17,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:17,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 20:26:17,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1002250300] [2020-09-11 20:26:17,836 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:17,838 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:17,842 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-11 20:26:17,842 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:17,863 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:17,863 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:17,900 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:17,900 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:17,901 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8213#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-11 20:26:17,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 20:26:17,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:17,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 20:26:17,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-11 20:26:17,902 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 16 states. [2020-09-11 20:26:18,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:18,404 INFO L93 Difference]: Finished difference Result 102 states and 232 transitions. [2020-09-11 20:26:18,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 20:26:18,405 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 20:26:18,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:18,406 INFO L225 Difference]: With dead ends: 102 [2020-09-11 20:26:18,407 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 20:26:18,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 20:26:18,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 20:26:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2020-09-11 20:26:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 20:26:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 148 transitions. [2020-09-11 20:26:18,411 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 148 transitions. Word has length 19 [2020-09-11 20:26:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:18,412 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 148 transitions. [2020-09-11 20:26:18,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 20:26:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 148 transitions. [2020-09-11 20:26:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 20:26:18,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:18,413 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:18,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:18,623 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:18,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:18,623 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 32 times [2020-09-11 20:26:18,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:18,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66271833] [2020-09-11 20:26:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:18,837 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 20:26:18,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66271833] [2020-09-11 20:26:18,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641146642] [2020-09-11 20:26:18,838 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 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 20:26:18,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:26:18,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:18,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 20:26:18,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:18,927 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 20:26:18,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:18,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 20:26:18,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [323369593] [2020-09-11 20:26:18,929 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:18,932 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:18,937 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-11 20:26:18,938 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:18,950 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:18,950 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:18,989 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:18,990 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:18,991 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8539#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:26:18,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 20:26:18,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:18,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 20:26:18,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-09-11 20:26:18,993 INFO L87 Difference]: Start difference. First operand 60 states and 148 transitions. Second operand 16 states. [2020-09-11 20:26:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:19,482 INFO L93 Difference]: Finished difference Result 99 states and 228 transitions. [2020-09-11 20:26:19,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 20:26:19,483 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 20:26:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:19,484 INFO L225 Difference]: With dead ends: 99 [2020-09-11 20:26:19,484 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 20:26:19,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 20:26:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 20:26:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2020-09-11 20:26:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 20:26:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 154 transitions. [2020-09-11 20:26:19,489 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 154 transitions. Word has length 19 [2020-09-11 20:26:19,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:19,489 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 154 transitions. [2020-09-11 20:26:19,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 20:26:19,489 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 154 transitions. [2020-09-11 20:26:19,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 20:26:19,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:19,490 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:19,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 20:26:19,695 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:19,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:19,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 33 times [2020-09-11 20:26:19,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:19,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349426550] [2020-09-11 20:26:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:19,872 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 20:26:19,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349426550] [2020-09-11 20:26:19,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235237803] [2020-09-11 20:26:19,873 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 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 20:26:19,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 20:26:19,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:19,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 20:26:19,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:19,950 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 20:26:19,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:19,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 20:26:19,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1302131372] [2020-09-11 20:26:19,951 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:19,953 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:19,957 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-11 20:26:19,957 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:19,958 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:19,958 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:19,994 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:19,994 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:20,004 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8870#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:26:20,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 20:26:20,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:20,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 20:26:20,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-11 20:26:20,005 INFO L87 Difference]: Start difference. First operand 62 states and 154 transitions. Second operand 16 states. [2020-09-11 20:26:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:20,624 INFO L93 Difference]: Finished difference Result 97 states and 226 transitions. [2020-09-11 20:26:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 20:26:20,625 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 20:26:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:20,626 INFO L225 Difference]: With dead ends: 97 [2020-09-11 20:26:20,626 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 20:26:20,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 20:26:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 20:26:20,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2020-09-11 20:26:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 20:26:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 160 transitions. [2020-09-11 20:26:20,631 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 160 transitions. Word has length 19 [2020-09-11 20:26:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:20,631 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 160 transitions. [2020-09-11 20:26:20,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 20:26:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 160 transitions. [2020-09-11 20:26:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 20:26:20,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:20,632 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:20,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-11 20:26:20,840 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:20,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:20,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 34 times [2020-09-11 20:26:20,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:20,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713503781] [2020-09-11 20:26:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:21,000 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 20:26:21,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713503781] [2020-09-11 20:26:21,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864113667] [2020-09-11 20:26:21,001 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 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 20:26:21,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:26:21,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:21,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 20:26:21,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:21,105 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 20:26:21,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:21,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 20:26:21,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [557411362] [2020-09-11 20:26:21,110 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:21,111 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:21,114 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-11 20:26:21,114 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:21,115 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:21,116 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:21,165 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:21,166 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:21,177 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9207#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:26:21,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 20:26:21,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:21,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 20:26:21,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-11 20:26:21,178 INFO L87 Difference]: Start difference. First operand 64 states and 160 transitions. Second operand 16 states. [2020-09-11 20:26:21,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:21,900 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-11 20:26:21,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 20:26:21,901 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 20:26:21,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:21,902 INFO L225 Difference]: With dead ends: 97 [2020-09-11 20:26:21,902 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 20:26:21,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=443, Invalid=1039, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 20:26:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 20:26:21,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-11 20:26:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 20:26:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 168 transitions. [2020-09-11 20:26:21,906 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 168 transitions. Word has length 19 [2020-09-11 20:26:21,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:21,906 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 168 transitions. [2020-09-11 20:26:21,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 20:26:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 168 transitions. [2020-09-11 20:26:21,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 20:26:21,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:21,907 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:22,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 20:26:22,119 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:22,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:22,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 35 times [2020-09-11 20:26:22,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:22,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698323991] [2020-09-11 20:26:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:22,254 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 20:26:22,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698323991] [2020-09-11 20:26:22,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97821100] [2020-09-11 20:26:22,255 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 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 20:26:22,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 20:26:22,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:22,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 20:26:22,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:22,333 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 20:26:22,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:22,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 20:26:22,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [183644110] [2020-09-11 20:26:22,334 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:22,336 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:22,338 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-11 20:26:22,338 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:22,348 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:22,349 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:22,386 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:22,387 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:22,391 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9552#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:26:22,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 20:26:22,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:22,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 20:26:22,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-09-11 20:26:22,392 INFO L87 Difference]: Start difference. First operand 66 states and 168 transitions. Second operand 16 states. [2020-09-11 20:26:23,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:23,161 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-11 20:26:23,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 20:26:23,162 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 20:26:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:23,163 INFO L225 Difference]: With dead ends: 98 [2020-09-11 20:26:23,163 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 20:26:23,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=526, Invalid=1114, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 20:26:23,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 20:26:23,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2020-09-11 20:26:23,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 20:26:23,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-11 20:26:23,167 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 19 [2020-09-11 20:26:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:23,168 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-11 20:26:23,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 20:26:23,168 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-11 20:26:23,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 20:26:23,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:23,169 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:23,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-11 20:26:23,371 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:23,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:23,372 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 36 times [2020-09-11 20:26:23,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:23,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902695559] [2020-09-11 20:26:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:23,591 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 20:26:23,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902695559] [2020-09-11 20:26:23,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751998741] [2020-09-11 20:26:23,592 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 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 20:26:23,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 20:26:23,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:23,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 20:26:23,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:23,668 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 20:26:23,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:23,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 20:26:23,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2065569989] [2020-09-11 20:26:23,669 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:23,671 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:23,674 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2020-09-11 20:26:23,675 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:23,684 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:23,684 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:23,728 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:23,728 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:23,741 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9882#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:26:23,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 20:26:23,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:23,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 20:26:23,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:26:23,742 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 17 states. [2020-09-11 20:26:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:24,149 INFO L93 Difference]: Finished difference Result 94 states and 216 transitions. [2020-09-11 20:26:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:26:24,149 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 20:26:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:24,151 INFO L225 Difference]: With dead ends: 94 [2020-09-11 20:26:24,151 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 20:26:24,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2020-09-11 20:26:24,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 20:26:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2020-09-11 20:26:24,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 20:26:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2020-09-11 20:26:24,156 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 20 [2020-09-11 20:26:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:24,156 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2020-09-11 20:26:24,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 20:26:24,157 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2020-09-11 20:26:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 20:26:24,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:24,157 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:24,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-11 20:26:24,367 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:24,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:24,368 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 37 times [2020-09-11 20:26:24,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:24,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286279450] [2020-09-11 20:26:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:24,566 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 20:26:24,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286279450] [2020-09-11 20:26:24,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954498535] [2020-09-11 20:26:24,567 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 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 20:26:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:24,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 20:26:24,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:24,651 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 20:26:24,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:24,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 20:26:24,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1772378814] [2020-09-11 20:26:24,652 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:24,654 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:24,658 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-11 20:26:24,658 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:24,665 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:24,666 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:24,716 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:24,716 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:24,736 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10202#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:26:24,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 20:26:24,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:24,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 20:26:24,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:26:24,737 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand 17 states. [2020-09-11 20:26:25,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:25,248 INFO L93 Difference]: Finished difference Result 91 states and 212 transitions. [2020-09-11 20:26:25,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 20:26:25,250 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 20:26:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:25,251 INFO L225 Difference]: With dead ends: 91 [2020-09-11 20:26:25,251 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 20:26:25,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 20:26:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 20:26:25,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2020-09-11 20:26:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 20:26:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 156 transitions. [2020-09-11 20:26:25,255 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 156 transitions. Word has length 20 [2020-09-11 20:26:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:25,255 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 156 transitions. [2020-09-11 20:26:25,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 20:26:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 156 transitions. [2020-09-11 20:26:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 20:26:25,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:25,256 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:25,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 20:26:25,465 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:25,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:25,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 38 times [2020-09-11 20:26:25,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:25,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193797281] [2020-09-11 20:26:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:25,661 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 20:26:25,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193797281] [2020-09-11 20:26:25,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798099167] [2020-09-11 20:26:25,662 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 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 20:26:25,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:26:25,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:25,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 20:26:25,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:25,753 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 20:26:25,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:25,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 20:26:25,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1842137221] [2020-09-11 20:26:25,754 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:25,756 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:25,760 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-11 20:26:25,760 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:25,761 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:25,761 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:25,793 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:25,793 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:25,806 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10527#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:26:25,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 20:26:25,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:25,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 20:26:25,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:26:25,807 INFO L87 Difference]: Start difference. First operand 63 states and 156 transitions. Second operand 17 states. [2020-09-11 20:26:26,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:26,382 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2020-09-11 20:26:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 20:26:26,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 20:26:26,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:26,384 INFO L225 Difference]: With dead ends: 89 [2020-09-11 20:26:26,384 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 20:26:26,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 20:26:26,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 20:26:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-09-11 20:26:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 20:26:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 162 transitions. [2020-09-11 20:26:26,388 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 162 transitions. Word has length 20 [2020-09-11 20:26:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:26,389 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 162 transitions. [2020-09-11 20:26:26,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 20:26:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 162 transitions. [2020-09-11 20:26:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 20:26:26,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:26,390 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:26,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 20:26:26,597 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:26,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:26,598 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 39 times [2020-09-11 20:26:26,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:26,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898763311] [2020-09-11 20:26:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:26,763 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 20:26:26,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898763311] [2020-09-11 20:26:26,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544744830] [2020-09-11 20:26:26,764 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 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 20:26:26,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 20:26:26,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:26,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 20:26:26,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:26,841 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 20:26:26,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:26,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 20:26:26,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [631801636] [2020-09-11 20:26:26,842 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:26,844 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:26,848 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-11 20:26:26,848 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:26,849 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:26,850 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:26,883 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:26,884 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:26,898 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10858#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:26:26,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 20:26:26,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:26,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 20:26:26,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:26:26,899 INFO L87 Difference]: Start difference. First operand 65 states and 162 transitions. Second operand 17 states. [2020-09-11 20:26:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:27,591 INFO L93 Difference]: Finished difference Result 87 states and 208 transitions. [2020-09-11 20:26:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 20:26:27,592 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 20:26:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:27,593 INFO L225 Difference]: With dead ends: 87 [2020-09-11 20:26:27,593 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 20:26:27,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 20:26:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 20:26:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-09-11 20:26:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 20:26:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 168 transitions. [2020-09-11 20:26:27,596 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 168 transitions. Word has length 20 [2020-09-11 20:26:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:27,597 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 168 transitions. [2020-09-11 20:26:27,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 20:26:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 168 transitions. [2020-09-11 20:26:27,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 20:26:27,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:27,597 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:27,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:27,805 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:27,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:27,806 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 40 times [2020-09-11 20:26:27,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:27,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363698950] [2020-09-11 20:26:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:28,012 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 20:26:28,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363698950] [2020-09-11 20:26:28,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798225844] [2020-09-11 20:26:28,013 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 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 20:26:28,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:26:28,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:28,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 20:26:28,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:28,112 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 20:26:28,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:28,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 20:26:28,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1317808639] [2020-09-11 20:26:28,113 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:28,115 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:28,119 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-11 20:26:28,120 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:28,120 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:28,121 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:28,168 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:28,168 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:28,182 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11195#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-11 20:26:28,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 20:26:28,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:28,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 20:26:28,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:26:28,183 INFO L87 Difference]: Start difference. First operand 67 states and 168 transitions. Second operand 17 states. [2020-09-11 20:26:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:28,988 INFO L93 Difference]: Finished difference Result 87 states and 211 transitions. [2020-09-11 20:26:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 20:26:28,989 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 20:26:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:28,990 INFO L225 Difference]: With dead ends: 87 [2020-09-11 20:26:28,990 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 20:26:28,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=456, Invalid=1104, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 20:26:28,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 20:26:28,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-09-11 20:26:28,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 20:26:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 176 transitions. [2020-09-11 20:26:28,994 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 176 transitions. Word has length 20 [2020-09-11 20:26:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:28,994 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 176 transitions. [2020-09-11 20:26:28,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 20:26:28,995 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 176 transitions. [2020-09-11 20:26:28,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 20:26:28,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:28,995 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:29,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:29,199 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:29,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:29,199 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 41 times [2020-09-11 20:26:29,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:29,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635622982] [2020-09-11 20:26:29,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:29,363 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 20:26:29,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635622982] [2020-09-11 20:26:29,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433354298] [2020-09-11 20:26:29,364 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 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 20:26:29,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 20:26:29,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:29,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 20:26:29,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:29,447 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 20:26:29,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:29,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 20:26:29,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [295381877] [2020-09-11 20:26:29,448 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:29,450 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:29,453 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-11 20:26:29,454 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:29,454 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:29,454 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:29,501 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:29,501 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:29,514 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11540#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-11 20:26:29,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 20:26:29,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:29,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 20:26:29,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:26:29,515 INFO L87 Difference]: Start difference. First operand 69 states and 176 transitions. Second operand 17 states. [2020-09-11 20:26:30,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:30,373 INFO L93 Difference]: Finished difference Result 87 states and 219 transitions. [2020-09-11 20:26:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 20:26:30,374 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 20:26:30,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:30,375 INFO L225 Difference]: With dead ends: 87 [2020-09-11 20:26:30,375 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 20:26:30,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=540, Invalid=1182, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 20:26:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 20:26:30,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-11 20:26:30,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 20:26:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-11 20:26:30,379 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 20 [2020-09-11 20:26:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:30,379 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-11 20:26:30,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 20:26:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-11 20:26:30,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 20:26:30,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:30,380 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:30,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:30,581 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:30,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 42 times [2020-09-11 20:26:30,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:30,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438048241] [2020-09-11 20:26:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:30,866 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 20:26:30,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438048241] [2020-09-11 20:26:30,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114502911] [2020-09-11 20:26:30,867 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 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 20:26:30,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 20:26:30,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 20:26:30,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:30,999 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 20:26:31,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:31,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 20:26:31,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [209342214] [2020-09-11 20:26:31,001 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:31,004 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:31,011 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2020-09-11 20:26:31,012 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:31,028 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:31,028 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:31,055 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:31,056 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:31,079 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:31,079 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:31,089 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:31,090 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:31,109 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:31,110 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:31,112 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:31,112 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:31,135 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:31,135 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:31,143 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:31,144 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:31,156 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11863#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-11 20:26:31,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 20:26:31,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:31,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 20:26:31,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-11 20:26:31,158 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 18 states. [2020-09-11 20:26:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:31,694 INFO L93 Difference]: Finished difference Result 84 states and 196 transitions. [2020-09-11 20:26:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 20:26:31,695 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 20:26:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:31,696 INFO L225 Difference]: With dead ends: 84 [2020-09-11 20:26:31,696 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 20:26:31,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=304, Invalid=752, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 20:26:31,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 20:26:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-11 20:26:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 20:26:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-11 20:26:31,703 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 21 [2020-09-11 20:26:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:31,703 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-11 20:26:31,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 20:26:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-11 20:26:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 20:26:31,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:31,705 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:31,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 20:26:31,917 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:31,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:31,918 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 43 times [2020-09-11 20:26:31,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:31,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958688176] [2020-09-11 20:26:31,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:32,143 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 20:26:32,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958688176] [2020-09-11 20:26:32,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628056555] [2020-09-11 20:26:32,144 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 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 20:26:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:32,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 20:26:32,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:32,209 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 20:26:32,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:32,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 20:26:32,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [187789550] [2020-09-11 20:26:32,210 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:32,213 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:32,217 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-11 20:26:32,217 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:32,218 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:32,218 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:32,252 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:32,252 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:32,262 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12179#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-11 20:26:32,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 20:26:32,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 20:26:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-09-11 20:26:32,263 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 18 states. [2020-09-11 20:26:32,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:32,814 INFO L93 Difference]: Finished difference Result 112 states and 254 transitions. [2020-09-11 20:26:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 20:26:32,814 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 20:26:32,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:32,815 INFO L225 Difference]: With dead ends: 112 [2020-09-11 20:26:32,816 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 20:26:32,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 20:26:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 20:26:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2020-09-11 20:26:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 20:26:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 158 transitions. [2020-09-11 20:26:32,820 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 158 transitions. Word has length 21 [2020-09-11 20:26:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:32,820 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 158 transitions. [2020-09-11 20:26:32,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 20:26:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 158 transitions. [2020-09-11 20:26:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 20:26:32,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:32,820 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:33,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:33,022 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:33,023 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 44 times [2020-09-11 20:26:33,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:33,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340115564] [2020-09-11 20:26:33,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:33,205 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 20:26:33,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340115564] [2020-09-11 20:26:33,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606237963] [2020-09-11 20:26:33,205 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 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 20:26:33,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:26:33,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:33,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 20:26:33,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:33,285 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 20:26:33,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:33,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 20:26:33,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1004575140] [2020-09-11 20:26:33,286 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:33,287 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:33,290 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-11 20:26:33,290 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:33,291 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:33,291 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:33,329 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:33,330 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:33,340 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12535#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:26:33,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 20:26:33,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:33,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 20:26:33,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-11 20:26:33,341 INFO L87 Difference]: Start difference. First operand 64 states and 158 transitions. Second operand 18 states. [2020-09-11 20:26:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:33,949 INFO L93 Difference]: Finished difference Result 109 states and 250 transitions. [2020-09-11 20:26:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 20:26:33,950 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 20:26:33,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:33,951 INFO L225 Difference]: With dead ends: 109 [2020-09-11 20:26:33,951 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 20:26:33,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 20:26:33,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 20:26:33,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 66. [2020-09-11 20:26:33,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 20:26:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 164 transitions. [2020-09-11 20:26:33,954 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 164 transitions. Word has length 21 [2020-09-11 20:26:33,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:33,955 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 164 transitions. [2020-09-11 20:26:33,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 20:26:33,955 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 164 transitions. [2020-09-11 20:26:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 20:26:33,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:33,956 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:34,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:34,165 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:34,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:34,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 45 times [2020-09-11 20:26:34,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:34,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667800462] [2020-09-11 20:26:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:34,360 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 20:26:34,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667800462] [2020-09-11 20:26:34,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346883274] [2020-09-11 20:26:34,361 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 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 20:26:34,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 20:26:34,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:34,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 20:26:34,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:34,456 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 20:26:34,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:34,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 20:26:34,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1035825622] [2020-09-11 20:26:34,457 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:34,459 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:34,463 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-11 20:26:34,463 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:34,464 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:34,464 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:34,503 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:34,503 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:34,514 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12896#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:26:34,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 20:26:34,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:34,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 20:26:34,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-11 20:26:34,516 INFO L87 Difference]: Start difference. First operand 66 states and 164 transitions. Second operand 18 states. [2020-09-11 20:26:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:35,261 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-09-11 20:26:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 20:26:35,262 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 20:26:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:35,263 INFO L225 Difference]: With dead ends: 107 [2020-09-11 20:26:35,263 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 20:26:35,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 20:26:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 20:26:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-09-11 20:26:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 20:26:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 170 transitions. [2020-09-11 20:26:35,267 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 170 transitions. Word has length 21 [2020-09-11 20:26:35,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:35,267 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 170 transitions. [2020-09-11 20:26:35,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 20:26:35,268 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 170 transitions. [2020-09-11 20:26:35,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 20:26:35,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:35,268 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:35,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-09-11 20:26:35,479 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:35,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:35,480 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 46 times [2020-09-11 20:26:35,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:35,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423591245] [2020-09-11 20:26:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:35,686 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 20:26:35,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423591245] [2020-09-11 20:26:35,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91918432] [2020-09-11 20:26:35,687 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 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 20:26:35,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:26:35,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:35,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 20:26:35,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:35,770 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 20:26:35,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:35,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 20:26:35,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [109675464] [2020-09-11 20:26:35,771 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:35,773 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:35,777 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-11 20:26:35,777 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:35,778 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:35,778 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:35,817 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:35,817 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:35,826 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13263#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:26:35,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 20:26:35,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:35,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 20:26:35,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-11 20:26:35,828 INFO L87 Difference]: Start difference. First operand 68 states and 170 transitions. Second operand 18 states. [2020-09-11 20:26:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:36,639 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-11 20:26:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 20:26:36,640 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 20:26:36,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:36,640 INFO L225 Difference]: With dead ends: 105 [2020-09-11 20:26:36,640 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 20:26:36,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=510, Invalid=1296, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 20:26:36,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 20:26:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-09-11 20:26:36,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 20:26:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 176 transitions. [2020-09-11 20:26:36,643 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 176 transitions. Word has length 21 [2020-09-11 20:26:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:36,644 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 176 transitions. [2020-09-11 20:26:36,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 20:26:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 176 transitions. [2020-09-11 20:26:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 20:26:36,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:36,645 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:36,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-11 20:26:36,855 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:36,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:36,856 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 47 times [2020-09-11 20:26:36,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:36,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680063378] [2020-09-11 20:26:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:37,025 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 20:26:37,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680063378] [2020-09-11 20:26:37,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961264629] [2020-09-11 20:26:37,026 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 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 20:26:37,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 20:26:37,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:37,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 20:26:37,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:37,114 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 20:26:37,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:37,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 20:26:37,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [616856337] [2020-09-11 20:26:37,115 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:37,116 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:37,120 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-11 20:26:37,120 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:37,121 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:37,121 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:37,165 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:37,165 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:37,175 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13636#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:26:37,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 20:26:37,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:37,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 20:26:37,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-09-11 20:26:37,177 INFO L87 Difference]: Start difference. First operand 70 states and 176 transitions. Second operand 18 states. [2020-09-11 20:26:38,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:38,078 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2020-09-11 20:26:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 20:26:38,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 20:26:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:38,079 INFO L225 Difference]: With dead ends: 105 [2020-09-11 20:26:38,080 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 20:26:38,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=593, Invalid=1387, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 20:26:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 20:26:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2020-09-11 20:26:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 20:26:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 184 transitions. [2020-09-11 20:26:38,084 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 184 transitions. Word has length 21 [2020-09-11 20:26:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:38,084 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 184 transitions. [2020-09-11 20:26:38,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 20:26:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 184 transitions. [2020-09-11 20:26:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 20:26:38,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:38,085 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:38,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 20:26:38,286 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:38,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:38,286 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 48 times [2020-09-11 20:26:38,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:38,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373842688] [2020-09-11 20:26:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:38,479 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 20:26:38,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373842688] [2020-09-11 20:26:38,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161722395] [2020-09-11 20:26:38,480 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 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 20:26:38,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 20:26:38,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:38,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 20:26:38,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:38,569 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 20:26:38,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:38,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 20:26:38,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1605389193] [2020-09-11 20:26:38,571 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:38,572 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:38,576 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-11 20:26:38,576 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:38,576 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:38,577 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:38,617 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:38,618 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:38,628 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14017#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-11 20:26:38,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 20:26:38,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 20:26:38,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-09-11 20:26:38,629 INFO L87 Difference]: Start difference. First operand 72 states and 184 transitions. Second operand 18 states. [2020-09-11 20:26:39,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:39,588 INFO L93 Difference]: Finished difference Result 106 states and 259 transitions. [2020-09-11 20:26:39,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 20:26:39,589 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 20:26:39,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:39,590 INFO L225 Difference]: With dead ends: 106 [2020-09-11 20:26:39,590 INFO L226 Difference]: Without dead ends: 94 [2020-09-11 20:26:39,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=690, Invalid=1472, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 20:26:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-11 20:26:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2020-09-11 20:26:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 20:26:39,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-11 20:26:39,595 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 21 [2020-09-11 20:26:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:39,595 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-11 20:26:39,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 20:26:39,595 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-11 20:26:39,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 20:26:39,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:39,596 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:39,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:39,797 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:39,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 49 times [2020-09-11 20:26:39,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:39,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098404519] [2020-09-11 20:26:39,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:40,027 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 20:26:40,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098404519] [2020-09-11 20:26:40,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986029616] [2020-09-11 20:26:40,028 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 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 20:26:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:40,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 20:26:40,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:40,106 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 20:26:40,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:40,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 20:26:40,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [698949841] [2020-09-11 20:26:40,107 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:40,109 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:40,114 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 38 transitions. [2020-09-11 20:26:40,114 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:40,115 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:40,115 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:40,162 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:40,163 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:40,181 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14379#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:26:40,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 20:26:40,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:40,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 20:26:40,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-11 20:26:40,183 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 19 states. [2020-09-11 20:26:40,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:40,691 INFO L93 Difference]: Finished difference Result 102 states and 234 transitions. [2020-09-11 20:26:40,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 20:26:40,692 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 20:26:40,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:40,693 INFO L225 Difference]: With dead ends: 102 [2020-09-11 20:26:40,693 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 20:26:40,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 20:26:40,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 20:26:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2020-09-11 20:26:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 20:26:40,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 160 transitions. [2020-09-11 20:26:40,695 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 160 transitions. Word has length 22 [2020-09-11 20:26:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:40,696 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 160 transitions. [2020-09-11 20:26:40,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 20:26:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 160 transitions. [2020-09-11 20:26:40,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 20:26:40,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:40,697 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:40,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:40,897 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:40,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:40,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 50 times [2020-09-11 20:26:40,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:40,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153092005] [2020-09-11 20:26:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:41,160 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 20:26:41,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153092005] [2020-09-11 20:26:41,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700636312] [2020-09-11 20:26:41,161 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 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 20:26:41,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:26:41,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:41,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 20:26:41,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:41,243 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 20:26:41,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:41,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 20:26:41,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1362381354] [2020-09-11 20:26:41,244 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:41,246 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:41,250 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-11 20:26:41,250 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:41,265 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:41,266 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:41,314 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:41,314 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:41,315 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14727#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:26:41,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 20:26:41,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:41,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 20:26:41,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-11 20:26:41,316 INFO L87 Difference]: Start difference. First operand 65 states and 160 transitions. Second operand 19 states. [2020-09-11 20:26:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:41,823 INFO L93 Difference]: Finished difference Result 99 states and 230 transitions. [2020-09-11 20:26:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 20:26:41,823 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 20:26:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:41,825 INFO L225 Difference]: With dead ends: 99 [2020-09-11 20:26:41,825 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 20:26:41,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=367, Invalid=1039, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 20:26:41,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 20:26:41,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2020-09-11 20:26:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 20:26:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2020-09-11 20:26:41,829 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 22 [2020-09-11 20:26:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:41,829 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2020-09-11 20:26:41,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 20:26:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2020-09-11 20:26:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 20:26:41,830 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:41,831 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:42,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:42,041 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:42,042 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 51 times [2020-09-11 20:26:42,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:42,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305634730] [2020-09-11 20:26:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:42,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305634730] [2020-09-11 20:26:42,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643643966] [2020-09-11 20:26:42,272 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 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 20:26:42,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 20:26:42,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:42,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 20:26:42,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:42,358 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 20:26:42,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:42,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 20:26:42,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [886479917] [2020-09-11 20:26:42,360 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:42,362 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:42,367 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-11 20:26:42,367 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:42,369 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:42,369 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:42,404 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:42,404 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:42,417 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15080#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:26:42,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 20:26:42,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:42,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 20:26:42,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-11 20:26:42,419 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand 19 states. [2020-09-11 20:26:43,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:43,143 INFO L93 Difference]: Finished difference Result 97 states and 228 transitions. [2020-09-11 20:26:43,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 20:26:43,144 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 20:26:43,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:43,145 INFO L225 Difference]: With dead ends: 97 [2020-09-11 20:26:43,146 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 20:26:43,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 20:26:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 20:26:43,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2020-09-11 20:26:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 20:26:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2020-09-11 20:26:43,149 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 22 [2020-09-11 20:26:43,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:43,149 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2020-09-11 20:26:43,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 20:26:43,149 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2020-09-11 20:26:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 20:26:43,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:43,150 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:43,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:43,351 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:43,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 52 times [2020-09-11 20:26:43,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:43,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140827516] [2020-09-11 20:26:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:43,585 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 20:26:43,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140827516] [2020-09-11 20:26:43,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144834575] [2020-09-11 20:26:43,586 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 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 20:26:43,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:26:43,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 20:26:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:43,665 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 20:26:43,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:43,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 20:26:43,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1879389387] [2020-09-11 20:26:43,666 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:43,667 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:43,671 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-11 20:26:43,671 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:43,672 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:43,672 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:43,715 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:43,715 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:43,739 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15439#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:26:43,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 20:26:43,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:43,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 20:26:43,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-11 20:26:43,740 INFO L87 Difference]: Start difference. First operand 69 states and 172 transitions. Second operand 19 states. [2020-09-11 20:26:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:44,508 INFO L93 Difference]: Finished difference Result 95 states and 226 transitions. [2020-09-11 20:26:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 20:26:44,509 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 20:26:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:44,510 INFO L225 Difference]: With dead ends: 95 [2020-09-11 20:26:44,510 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 20:26:44,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 20:26:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 20:26:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2020-09-11 20:26:44,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 20:26:44,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 178 transitions. [2020-09-11 20:26:44,512 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 178 transitions. Word has length 22 [2020-09-11 20:26:44,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:44,512 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 178 transitions. [2020-09-11 20:26:44,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 20:26:44,512 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 178 transitions. [2020-09-11 20:26:44,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 20:26:44,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:44,513 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:44,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-11 20:26:44,716 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:44,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:44,717 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 53 times [2020-09-11 20:26:44,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:44,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123137891] [2020-09-11 20:26:44,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:44,928 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 20:26:44,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123137891] [2020-09-11 20:26:44,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178234823] [2020-09-11 20:26:44,928 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 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 20:26:44,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 20:26:44,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:44,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 20:26:44,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:45,021 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 20:26:45,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:45,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 20:26:45,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [877551109] [2020-09-11 20:26:45,022 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:45,026 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:45,030 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-11 20:26:45,031 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:45,032 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:45,033 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:45,080 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:45,080 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:45,093 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15804#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-11 20:26:45,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 20:26:45,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:45,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 20:26:45,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-11 20:26:45,095 INFO L87 Difference]: Start difference. First operand 71 states and 178 transitions. Second operand 19 states. [2020-09-11 20:26:45,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:45,952 INFO L93 Difference]: Finished difference Result 93 states and 224 transitions. [2020-09-11 20:26:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 20:26:45,953 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 20:26:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:45,954 INFO L225 Difference]: With dead ends: 93 [2020-09-11 20:26:45,954 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 20:26:45,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=523, Invalid=1369, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 20:26:45,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 20:26:45,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-09-11 20:26:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 20:26:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 184 transitions. [2020-09-11 20:26:45,958 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 184 transitions. Word has length 22 [2020-09-11 20:26:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:45,958 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 184 transitions. [2020-09-11 20:26:45,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 20:26:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 184 transitions. [2020-09-11 20:26:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 20:26:45,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:45,959 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:46,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:46,169 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:46,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:46,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 54 times [2020-09-11 20:26:46,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:46,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660358550] [2020-09-11 20:26:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:46,386 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 20:26:46,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660358550] [2020-09-11 20:26:46,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857728099] [2020-09-11 20:26:46,387 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 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 20:26:46,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 20:26:46,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:46,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 20:26:46,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:46,476 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 20:26:46,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:46,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 20:26:46,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [926682645] [2020-09-11 20:26:46,477 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:46,480 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:46,484 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-11 20:26:46,485 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:46,497 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:46,497 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:46,541 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:46,542 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:46,543 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16175#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-11 20:26:46,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 20:26:46,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:46,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 20:26:46,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-11 20:26:46,544 INFO L87 Difference]: Start difference. First operand 73 states and 184 transitions. Second operand 19 states. [2020-09-11 20:26:47,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:47,491 INFO L93 Difference]: Finished difference Result 93 states and 227 transitions. [2020-09-11 20:26:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 20:26:47,492 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 20:26:47,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:47,493 INFO L225 Difference]: With dead ends: 93 [2020-09-11 20:26:47,493 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 20:26:47,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=607, Invalid=1463, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 20:26:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 20:26:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2020-09-11 20:26:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 20:26:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2020-09-11 20:26:47,497 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 22 [2020-09-11 20:26:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:47,497 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2020-09-11 20:26:47,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 20:26:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2020-09-11 20:26:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 20:26:47,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:47,498 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:47,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 20:26:47,708 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 55 times [2020-09-11 20:26:47,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:47,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468702664] [2020-09-11 20:26:47,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:47,932 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 20:26:47,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468702664] [2020-09-11 20:26:47,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579197791] [2020-09-11 20:26:47,932 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 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 20:26:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:47,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 20:26:47,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:48,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:48,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 20:26:48,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1017174834] [2020-09-11 20:26:48,016 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:48,018 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:48,021 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-11 20:26:48,021 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:48,034 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:48,035 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:48,075 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:48,075 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:48,076 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16554#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-11 20:26:48,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 20:26:48,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:48,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 20:26:48,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-11 20:26:48,077 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand 19 states. [2020-09-11 20:26:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:49,118 INFO L93 Difference]: Finished difference Result 93 states and 235 transitions. [2020-09-11 20:26:49,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 20:26:49,120 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 20:26:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:49,121 INFO L225 Difference]: With dead ends: 93 [2020-09-11 20:26:49,121 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 20:26:49,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=1551, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 20:26:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 20:26:49,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2020-09-11 20:26:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 20:26:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-11 20:26:49,123 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 22 [2020-09-11 20:26:49,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:49,124 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-11 20:26:49,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 20:26:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-11 20:26:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 20:26:49,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:49,124 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:49,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-11 20:26:49,331 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:49,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:49,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 56 times [2020-09-11 20:26:49,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:49,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271060180] [2020-09-11 20:26:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:49,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271060180] [2020-09-11 20:26:49,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410582082] [2020-09-11 20:26:49,617 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 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 20:26:49,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:26:49,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:49,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 20:26:49,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:49,691 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 20:26:49,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:49,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 20:26:49,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [11978320] [2020-09-11 20:26:49,692 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:49,694 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:49,701 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 43 transitions. [2020-09-11 20:26:49,701 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:49,718 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:49,718 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:49,749 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:49,749 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:49,769 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:49,769 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:49,779 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:49,779 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:49,789 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:49,789 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:49,791 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:49,791 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:49,808 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:49,808 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:49,817 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:49,817 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:49,824 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16907#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-11 20:26:49,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 20:26:49,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:49,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 20:26:49,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:26:49,825 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 20 states. [2020-09-11 20:26:50,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:50,325 INFO L93 Difference]: Finished difference Result 90 states and 210 transitions. [2020-09-11 20:26:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 20:26:50,326 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 20:26:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:50,327 INFO L225 Difference]: With dead ends: 90 [2020-09-11 20:26:50,327 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 20:26:50,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=947, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 20:26:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 20:26:50,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-11 20:26:50,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 20:26:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-11 20:26:50,331 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 23 [2020-09-11 20:26:50,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:50,331 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-11 20:26:50,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 20:26:50,331 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-11 20:26:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 20:26:50,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:50,332 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:50,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:50,541 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:50,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 57 times [2020-09-11 20:26:50,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:50,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454092853] [2020-09-11 20:26:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:50,797 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 20:26:50,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454092853] [2020-09-11 20:26:50,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300496015] [2020-09-11 20:26:50,797 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 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 20:26:50,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 20:26:50,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:50,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 20:26:50,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:50,876 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 20:26:50,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:50,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 20:26:50,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1644150222] [2020-09-11 20:26:50,877 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:50,880 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:50,884 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-11 20:26:50,884 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:50,894 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:50,894 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:50,934 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:50,934 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:50,935 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17249#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-11 20:26:50,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 20:26:50,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:50,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 20:26:50,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:26:50,936 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 20 states. [2020-09-11 20:26:51,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:51,596 INFO L93 Difference]: Finished difference Result 122 states and 276 transitions. [2020-09-11 20:26:51,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 20:26:51,597 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 20:26:51,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:51,598 INFO L225 Difference]: With dead ends: 122 [2020-09-11 20:26:51,598 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 20:26:51,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 20:26:51,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 20:26:51,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 68. [2020-09-11 20:26:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 20:26:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 168 transitions. [2020-09-11 20:26:51,601 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 168 transitions. Word has length 23 [2020-09-11 20:26:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:51,601 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 168 transitions. [2020-09-11 20:26:51,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 20:26:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 168 transitions. [2020-09-11 20:26:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 20:26:51,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:51,602 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:51,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-11 20:26:51,803 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:51,804 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 58 times [2020-09-11 20:26:51,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:51,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720421594] [2020-09-11 20:26:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:52,045 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 20:26:52,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720421594] [2020-09-11 20:26:52,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689814657] [2020-09-11 20:26:52,047 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 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 20:26:52,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:26:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 20:26:52,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:52,154 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 20:26:52,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:52,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 20:26:52,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1363750487] [2020-09-11 20:26:52,156 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:52,160 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:52,168 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-11 20:26:52,168 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:52,169 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:52,170 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:52,220 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:52,220 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:52,231 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17635#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:26:52,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 20:26:52,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:52,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 20:26:52,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:26:52,232 INFO L87 Difference]: Start difference. First operand 68 states and 168 transitions. Second operand 20 states. [2020-09-11 20:26:52,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:52,980 INFO L93 Difference]: Finished difference Result 119 states and 272 transitions. [2020-09-11 20:26:52,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 20:26:52,981 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 20:26:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:52,982 INFO L225 Difference]: With dead ends: 119 [2020-09-11 20:26:52,982 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 20:26:52,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=473, Invalid=1333, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 20:26:52,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 20:26:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 70. [2020-09-11 20:26:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 20:26:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 174 transitions. [2020-09-11 20:26:52,986 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 174 transitions. Word has length 23 [2020-09-11 20:26:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:52,986 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 174 transitions. [2020-09-11 20:26:52,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 20:26:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 174 transitions. [2020-09-11 20:26:52,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 20:26:52,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:52,987 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:53,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:53,196 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:53,197 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 59 times [2020-09-11 20:26:53,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:53,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031216619] [2020-09-11 20:26:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:53,452 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 20:26:53,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031216619] [2020-09-11 20:26:53,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108292752] [2020-09-11 20:26:53,453 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 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 20:26:53,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 20:26:53,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:53,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 20:26:53,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:53,540 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 20:26:53,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:53,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 20:26:53,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [249726087] [2020-09-11 20:26:53,541 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:53,543 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:53,547 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-11 20:26:53,547 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:53,548 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:53,548 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:53,593 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:53,593 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:53,607 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18026#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:26:53,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 20:26:53,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:53,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 20:26:53,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:26:53,609 INFO L87 Difference]: Start difference. First operand 70 states and 174 transitions. Second operand 20 states. [2020-09-11 20:26:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:54,430 INFO L93 Difference]: Finished difference Result 117 states and 270 transitions. [2020-09-11 20:26:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 20:26:54,431 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 20:26:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:54,432 INFO L225 Difference]: With dead ends: 117 [2020-09-11 20:26:54,432 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 20:26:54,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=522, Invalid=1458, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 20:26:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 20:26:54,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2020-09-11 20:26:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 20:26:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 180 transitions. [2020-09-11 20:26:54,436 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 180 transitions. Word has length 23 [2020-09-11 20:26:54,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:54,436 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 180 transitions. [2020-09-11 20:26:54,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 20:26:54,436 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 180 transitions. [2020-09-11 20:26:54,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 20:26:54,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:54,436 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:54,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-09-11 20:26:54,637 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:54,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:54,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 60 times [2020-09-11 20:26:54,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:54,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640983483] [2020-09-11 20:26:54,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:54,874 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 20:26:54,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640983483] [2020-09-11 20:26:54,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612713657] [2020-09-11 20:26:54,875 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 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 20:26:54,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 20:26:54,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:54,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 20:26:54,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:54,958 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 20:26:54,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:54,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 20:26:54,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1354313981] [2020-09-11 20:26:54,959 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:54,962 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:54,965 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-11 20:26:54,966 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:54,976 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:54,976 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:55,022 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:55,022 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:55,023 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18423#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:26:55,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 20:26:55,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:55,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 20:26:55,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:26:55,024 INFO L87 Difference]: Start difference. First operand 72 states and 180 transitions. Second operand 20 states. [2020-09-11 20:26:55,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:55,845 INFO L93 Difference]: Finished difference Result 115 states and 268 transitions. [2020-09-11 20:26:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 20:26:55,848 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 20:26:55,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:55,849 INFO L225 Difference]: With dead ends: 115 [2020-09-11 20:26:55,849 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 20:26:55,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=587, Invalid=1575, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 20:26:55,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 20:26:55,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2020-09-11 20:26:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 20:26:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 186 transitions. [2020-09-11 20:26:55,852 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 186 transitions. Word has length 23 [2020-09-11 20:26:55,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:55,852 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 186 transitions. [2020-09-11 20:26:55,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 20:26:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 186 transitions. [2020-09-11 20:26:55,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 20:26:55,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:55,853 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:56,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:56,053 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:56,054 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 61 times [2020-09-11 20:26:56,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:56,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266644476] [2020-09-11 20:26:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:56,254 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 20:26:56,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266644476] [2020-09-11 20:26:56,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419568606] [2020-09-11 20:26:56,254 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 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 20:26:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:56,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 20:26:56,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:56,354 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 20:26:56,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:56,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 20:26:56,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [592297021] [2020-09-11 20:26:56,355 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:56,358 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:56,365 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-11 20:26:56,365 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:56,367 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:56,367 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:56,409 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:56,409 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:56,419 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18826#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:26:56,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 20:26:56,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:56,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 20:26:56,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:26:56,421 INFO L87 Difference]: Start difference. First operand 74 states and 186 transitions. Second operand 20 states. [2020-09-11 20:26:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:57,343 INFO L93 Difference]: Finished difference Result 113 states and 266 transitions. [2020-09-11 20:26:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 20:26:57,344 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 20:26:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:57,345 INFO L225 Difference]: With dead ends: 113 [2020-09-11 20:26:57,345 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 20:26:57,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=1684, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 20:26:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 20:26:57,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 76. [2020-09-11 20:26:57,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 20:26:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 192 transitions. [2020-09-11 20:26:57,348 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 192 transitions. Word has length 23 [2020-09-11 20:26:57,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:57,349 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 192 transitions. [2020-09-11 20:26:57,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 20:26:57,349 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 192 transitions. [2020-09-11 20:26:57,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 20:26:57,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:57,350 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:57,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-11 20:26:57,551 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:57,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:57,551 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 62 times [2020-09-11 20:26:57,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:57,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213030540] [2020-09-11 20:26:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:57,797 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 20:26:57,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213030540] [2020-09-11 20:26:57,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262270747] [2020-09-11 20:26:57,798 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 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 20:26:57,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:26:57,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:57,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 20:26:57,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:57,881 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 20:26:57,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:57,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 20:26:57,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [702585215] [2020-09-11 20:26:57,882 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:57,884 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:57,887 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-11 20:26:57,888 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:57,888 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:57,888 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:57,933 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:57,934 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:57,943 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19235#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-11 20:26:57,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 20:26:57,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:57,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 20:26:57,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:26:57,944 INFO L87 Difference]: Start difference. First operand 76 states and 192 transitions. Second operand 20 states. [2020-09-11 20:26:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:59,048 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-11 20:26:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 20:26:59,049 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 20:26:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:59,050 INFO L225 Difference]: With dead ends: 113 [2020-09-11 20:26:59,051 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 20:26:59,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=765, Invalid=1785, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 20:26:59,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 20:26:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2020-09-11 20:26:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 20:26:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 200 transitions. [2020-09-11 20:26:59,054 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 200 transitions. Word has length 23 [2020-09-11 20:26:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:59,054 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 200 transitions. [2020-09-11 20:26:59,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 20:26:59,055 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 200 transitions. [2020-09-11 20:26:59,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 20:26:59,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:59,055 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:59,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:59,258 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:59,259 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 63 times [2020-09-11 20:26:59,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:59,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572213265] [2020-09-11 20:26:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:59,459 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 20:26:59,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572213265] [2020-09-11 20:26:59,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311968990] [2020-09-11 20:26:59,460 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 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 20:26:59,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 20:26:59,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:59,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 20:26:59,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:59,548 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 20:26:59,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:59,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 20:26:59,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1123547883] [2020-09-11 20:26:59,549 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:59,551 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:59,555 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-11 20:26:59,555 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:59,555 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:59,556 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:59,597 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:59,597 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:59,610 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19652#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-11 20:26:59,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 20:26:59,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:59,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 20:26:59,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:26:59,611 INFO L87 Difference]: Start difference. First operand 78 states and 200 transitions. Second operand 20 states. [2020-09-11 20:27:00,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:00,770 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-09-11 20:27:00,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 20:27:00,771 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 20:27:00,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:00,772 INFO L225 Difference]: With dead ends: 114 [2020-09-11 20:27:00,772 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 20:27:00,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=876, Invalid=1880, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 20:27:00,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 20:27:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2020-09-11 20:27:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 20:27:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-11 20:27:00,775 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 23 [2020-09-11 20:27:00,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:00,776 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-11 20:27:00,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 20:27:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-11 20:27:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 20:27:00,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:00,776 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:00,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-11 20:27:00,977 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:00,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:00,978 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 64 times [2020-09-11 20:27:00,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:00,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675652744] [2020-09-11 20:27:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:01,322 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 20:27:01,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675652744] [2020-09-11 20:27:01,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060672273] [2020-09-11 20:27:01,323 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 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 20:27:01,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:27:01,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 20:27:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:01,437 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 20:27:01,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:01,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 20:27:01,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1327334804] [2020-09-11 20:27:01,439 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:01,443 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:01,453 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 40 transitions. [2020-09-11 20:27:01,453 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:01,454 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:01,454 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:01,510 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:01,511 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:01,528 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20046#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:27:01,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 20:27:01,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:01,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 20:27:01,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:27:01,529 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 21 states. [2020-09-11 20:27:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:02,074 INFO L93 Difference]: Finished difference Result 110 states and 252 transitions. [2020-09-11 20:27:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 20:27:02,075 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 20:27:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:02,076 INFO L225 Difference]: With dead ends: 110 [2020-09-11 20:27:02,077 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 20:27:02,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 20:27:02,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 20:27:02,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 69. [2020-09-11 20:27:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 20:27:02,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 170 transitions. [2020-09-11 20:27:02,081 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 170 transitions. Word has length 24 [2020-09-11 20:27:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:02,081 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 170 transitions. [2020-09-11 20:27:02,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 20:27:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 170 transitions. [2020-09-11 20:27:02,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 20:27:02,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:02,082 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:02,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:02,293 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:02,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 65 times [2020-09-11 20:27:02,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:02,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721062762] [2020-09-11 20:27:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:02,610 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 20:27:02,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721062762] [2020-09-11 20:27:02,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882993132] [2020-09-11 20:27:02,611 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 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 20:27:02,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 20:27:02,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:02,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 20:27:02,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:02,694 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 20:27:02,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:02,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 20:27:02,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [650705583] [2020-09-11 20:27:02,695 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:02,698 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:02,703 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-11 20:27:02,703 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:02,704 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:02,704 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:02,754 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:02,754 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:02,768 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20422#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:27:02,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 20:27:02,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:02,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 20:27:02,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:27:02,769 INFO L87 Difference]: Start difference. First operand 69 states and 170 transitions. Second operand 21 states. [2020-09-11 20:27:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:03,487 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-09-11 20:27:03,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 20:27:03,488 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 20:27:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:03,489 INFO L225 Difference]: With dead ends: 107 [2020-09-11 20:27:03,490 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 20:27:03,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=450, Invalid=1272, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 20:27:03,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 20:27:03,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2020-09-11 20:27:03,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 20:27:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 176 transitions. [2020-09-11 20:27:03,493 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 176 transitions. Word has length 24 [2020-09-11 20:27:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:03,493 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 176 transitions. [2020-09-11 20:27:03,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 20:27:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 176 transitions. [2020-09-11 20:27:03,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 20:27:03,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:03,494 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:03,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-11 20:27:03,702 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:03,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:03,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 66 times [2020-09-11 20:27:03,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:03,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605263663] [2020-09-11 20:27:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:04,011 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 20:27:04,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605263663] [2020-09-11 20:27:04,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427348136] [2020-09-11 20:27:04,012 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 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 20:27:04,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 20:27:04,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:04,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 20:27:04,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:04,097 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 20:27:04,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:04,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 20:27:04,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [506356682] [2020-09-11 20:27:04,098 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:04,100 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:04,106 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-11 20:27:04,106 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:04,107 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:04,107 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:04,157 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:04,158 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:04,171 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20803#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:27:04,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 20:27:04,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:04,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 20:27:04,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:27:04,172 INFO L87 Difference]: Start difference. First operand 71 states and 176 transitions. Second operand 21 states. [2020-09-11 20:27:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:04,993 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-11 20:27:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 20:27:04,994 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 20:27:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:04,995 INFO L225 Difference]: With dead ends: 105 [2020-09-11 20:27:04,995 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 20:27:04,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 20:27:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 20:27:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 73. [2020-09-11 20:27:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 20:27:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2020-09-11 20:27:04,999 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 24 [2020-09-11 20:27:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:04,999 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2020-09-11 20:27:04,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 20:27:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2020-09-11 20:27:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 20:27:05,000 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:05,000 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:05,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-09-11 20:27:05,201 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:05,201 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 67 times [2020-09-11 20:27:05,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:05,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525775964] [2020-09-11 20:27:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:05,470 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 20:27:05,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525775964] [2020-09-11 20:27:05,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287213968] [2020-09-11 20:27:05,471 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 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 20:27:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:05,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 20:27:05,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:05,586 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 20:27:05,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:05,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 20:27:05,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [636315356] [2020-09-11 20:27:05,587 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:05,608 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:05,654 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-11 20:27:05,654 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:05,656 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:05,656 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:05,717 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:05,717 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:05,735 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21190#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:27:05,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 20:27:05,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:05,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 20:27:05,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:27:05,736 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand 21 states. [2020-09-11 20:27:06,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:06,597 INFO L93 Difference]: Finished difference Result 103 states and 244 transitions. [2020-09-11 20:27:06,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 20:27:06,598 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 20:27:06,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:06,598 INFO L225 Difference]: With dead ends: 103 [2020-09-11 20:27:06,599 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 20:27:06,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=534, Invalid=1536, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 20:27:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 20:27:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2020-09-11 20:27:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 20:27:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 188 transitions. [2020-09-11 20:27:06,602 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 188 transitions. Word has length 24 [2020-09-11 20:27:06,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:06,603 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 188 transitions. [2020-09-11 20:27:06,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 20:27:06,603 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 188 transitions. [2020-09-11 20:27:06,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 20:27:06,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:06,604 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:06,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-11 20:27:06,812 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:06,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 68 times [2020-09-11 20:27:06,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:06,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611832956] [2020-09-11 20:27:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:07,066 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 20:27:07,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611832956] [2020-09-11 20:27:07,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91048410] [2020-09-11 20:27:07,067 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 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 20:27:07,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:27:07,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:07,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 20:27:07,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:07,149 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 20:27:07,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:07,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 20:27:07,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [904171349] [2020-09-11 20:27:07,150 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:07,152 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:07,156 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-11 20:27:07,156 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:07,157 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:07,157 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:07,202 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:07,202 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:07,222 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21583#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-11 20:27:07,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 20:27:07,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:07,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 20:27:07,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:27:07,223 INFO L87 Difference]: Start difference. First operand 75 states and 188 transitions. Second operand 21 states. [2020-09-11 20:27:08,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:08,236 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2020-09-11 20:27:08,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 20:27:08,236 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 20:27:08,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:08,237 INFO L225 Difference]: With dead ends: 101 [2020-09-11 20:27:08,237 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 20:27:08,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 20:27:08,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 20:27:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2020-09-11 20:27:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 20:27:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 194 transitions. [2020-09-11 20:27:08,240 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 194 transitions. Word has length 24 [2020-09-11 20:27:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:08,240 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 194 transitions. [2020-09-11 20:27:08,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 20:27:08,240 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 194 transitions. [2020-09-11 20:27:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 20:27:08,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:08,241 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:08,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:08,442 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:08,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 69 times [2020-09-11 20:27:08,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:08,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516311341] [2020-09-11 20:27:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:08,700 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 20:27:08,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516311341] [2020-09-11 20:27:08,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486294737] [2020-09-11 20:27:08,701 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 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 20:27:08,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 20:27:08,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:08,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 20:27:08,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:08,788 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 20:27:08,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:08,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 20:27:08,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1932770815] [2020-09-11 20:27:08,789 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:08,790 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:08,795 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-11 20:27:08,795 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:08,795 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:08,796 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:08,844 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:08,844 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:08,857 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21982#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-11 20:27:08,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 20:27:08,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:08,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 20:27:08,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:27:08,859 INFO L87 Difference]: Start difference. First operand 77 states and 194 transitions. Second operand 21 states. [2020-09-11 20:27:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:09,977 INFO L93 Difference]: Finished difference Result 99 states and 240 transitions. [2020-09-11 20:27:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 20:27:09,978 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 20:27:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:09,979 INFO L225 Difference]: With dead ends: 99 [2020-09-11 20:27:09,979 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 20:27:09,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=682, Invalid=1768, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 20:27:09,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 20:27:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2020-09-11 20:27:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 20:27:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 200 transitions. [2020-09-11 20:27:09,983 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 200 transitions. Word has length 24 [2020-09-11 20:27:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:09,983 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 200 transitions. [2020-09-11 20:27:09,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 20:27:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 200 transitions. [2020-09-11 20:27:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 20:27:09,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:09,984 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:10,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:10,189 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 70 times [2020-09-11 20:27:10,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:10,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481994974] [2020-09-11 20:27:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:10,458 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 20:27:10,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481994974] [2020-09-11 20:27:10,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339408582] [2020-09-11 20:27:10,459 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 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 20:27:10,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:27:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:10,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 20:27:10,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:10,574 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 20:27:10,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:10,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 20:27:10,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [306444497] [2020-09-11 20:27:10,575 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:10,580 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:10,589 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-11 20:27:10,589 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:10,591 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:10,591 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:10,645 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:10,645 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:10,660 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22387#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-11 20:27:10,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 20:27:10,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:10,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 20:27:10,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:27:10,661 INFO L87 Difference]: Start difference. First operand 79 states and 200 transitions. Second operand 21 states. [2020-09-11 20:27:12,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:12,077 INFO L93 Difference]: Finished difference Result 99 states and 243 transitions. [2020-09-11 20:27:12,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 20:27:12,078 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 20:27:12,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:12,080 INFO L225 Difference]: With dead ends: 99 [2020-09-11 20:27:12,080 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 20:27:12,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=780, Invalid=1872, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 20:27:12,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 20:27:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2020-09-11 20:27:12,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 20:27:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 208 transitions. [2020-09-11 20:27:12,085 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 208 transitions. Word has length 24 [2020-09-11 20:27:12,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:12,086 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 208 transitions. [2020-09-11 20:27:12,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 20:27:12,086 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 208 transitions. [2020-09-11 20:27:12,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 20:27:12,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:12,087 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:12,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:12,300 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:12,301 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 71 times [2020-09-11 20:27:12,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:12,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024637189] [2020-09-11 20:27:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:12,607 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 20:27:12,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024637189] [2020-09-11 20:27:12,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426747564] [2020-09-11 20:27:12,608 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 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 20:27:12,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 20:27:12,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:12,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 20:27:12,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:12,711 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 20:27:12,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:12,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 20:27:12,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1332814766] [2020-09-11 20:27:12,712 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:12,715 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:12,723 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-11 20:27:12,723 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:12,724 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:12,724 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:12,763 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:12,763 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:12,776 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22800#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-11 20:27:12,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 20:27:12,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:12,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 20:27:12,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:27:12,777 INFO L87 Difference]: Start difference. First operand 81 states and 208 transitions. Second operand 21 states. [2020-09-11 20:27:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:13,971 INFO L93 Difference]: Finished difference Result 99 states and 251 transitions. [2020-09-11 20:27:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 20:27:13,972 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 20:27:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:13,973 INFO L225 Difference]: With dead ends: 99 [2020-09-11 20:27:13,973 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 20:27:13,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=892, Invalid=1970, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 20:27:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 20:27:13,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2020-09-11 20:27:13,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 20:27:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-11 20:27:13,976 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 24 [2020-09-11 20:27:13,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:13,976 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-11 20:27:13,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 20:27:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-11 20:27:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 20:27:13,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:13,977 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:14,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-09-11 20:27:14,179 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:14,180 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 72 times [2020-09-11 20:27:14,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:14,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120471343] [2020-09-11 20:27:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:14,498 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 20:27:14,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120471343] [2020-09-11 20:27:14,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611838268] [2020-09-11 20:27:14,499 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 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 20:27:14,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 20:27:14,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:14,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 20:27:14,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:27:14,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:14,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 20:27:14,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [334148366] [2020-09-11 20:27:14,593 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:14,598 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:14,608 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 45 transitions. [2020-09-11 20:27:14,609 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:14,620 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:14,620 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:14,649 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:14,650 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:14,670 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:14,670 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:14,679 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:14,679 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:14,700 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:14,700 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:14,704 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:14,704 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:14,728 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:14,729 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:14,735 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:14,735 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:14,744 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23183#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-11 20:27:14,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 20:27:14,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:14,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 20:27:14,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-11 20:27:14,745 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 22 states. [2020-09-11 20:27:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:15,316 INFO L93 Difference]: Finished difference Result 96 states and 224 transitions. [2020-09-11 20:27:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 20:27:15,317 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 20:27:15,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:15,318 INFO L225 Difference]: With dead ends: 96 [2020-09-11 20:27:15,318 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 20:27:15,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=476, Invalid=1164, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 20:27:15,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 20:27:15,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-11 20:27:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 20:27:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-09-11 20:27:15,321 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 25 [2020-09-11 20:27:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:15,321 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-09-11 20:27:15,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 20:27:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-09-11 20:27:15,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 20:27:15,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:15,322 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:15,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:15,523 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:15,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:15,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 73 times [2020-09-11 20:27:15,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:15,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903634547] [2020-09-11 20:27:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:15,878 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 20:27:15,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903634547] [2020-09-11 20:27:15,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917613489] [2020-09-11 20:27:15,879 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 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 20:27:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:15,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 20:27:15,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:27:15,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:15,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 20:27:15,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [250343913] [2020-09-11 20:27:15,954 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:15,956 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:15,960 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-11 20:27:15,961 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:15,961 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:15,961 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:16,005 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:16,005 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:16,015 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23551#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-11 20:27:16,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 20:27:16,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:16,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 20:27:16,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-09-11 20:27:16,016 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 22 states. [2020-09-11 20:27:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:16,784 INFO L93 Difference]: Finished difference Result 132 states and 298 transitions. [2020-09-11 20:27:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 20:27:16,785 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 20:27:16,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:16,786 INFO L225 Difference]: With dead ends: 132 [2020-09-11 20:27:16,786 INFO L226 Difference]: Without dead ends: 126 [2020-09-11 20:27:16,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=533, Invalid=1447, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 20:27:16,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-11 20:27:16,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2020-09-11 20:27:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 20:27:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 178 transitions. [2020-09-11 20:27:16,789 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 178 transitions. Word has length 25 [2020-09-11 20:27:16,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:16,790 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 178 transitions. [2020-09-11 20:27:16,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 20:27:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 178 transitions. [2020-09-11 20:27:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 20:27:16,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:16,790 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:16,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:16,991 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:16,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 74 times [2020-09-11 20:27:16,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:16,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607242720] [2020-09-11 20:27:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:17,301 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 20:27:17,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607242720] [2020-09-11 20:27:17,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434219289] [2020-09-11 20:27:17,301 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 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 20:27:17,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:27:17,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:17,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 20:27:17,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:17,389 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 20:27:17,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:17,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 20:27:17,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1619546664] [2020-09-11 20:27:17,390 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:17,392 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:17,396 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-11 20:27:17,396 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:17,406 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:17,406 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:17,447 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:17,448 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:17,448 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23967#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:27:17,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 20:27:17,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:17,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 20:27:17,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-09-11 20:27:17,450 INFO L87 Difference]: Start difference. First operand 72 states and 178 transitions. Second operand 22 states. [2020-09-11 20:27:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:18,295 INFO L93 Difference]: Finished difference Result 129 states and 294 transitions. [2020-09-11 20:27:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 20:27:18,296 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 20:27:18,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:18,297 INFO L225 Difference]: With dead ends: 129 [2020-09-11 20:27:18,297 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 20:27:18,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=564, Invalid=1598, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 20:27:18,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 20:27:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2020-09-11 20:27:18,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 20:27:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2020-09-11 20:27:18,301 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 25 [2020-09-11 20:27:18,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:18,301 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2020-09-11 20:27:18,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 20:27:18,301 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2020-09-11 20:27:18,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 20:27:18,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:18,301 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:18,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:18,502 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:18,503 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 75 times [2020-09-11 20:27:18,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:18,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107181188] [2020-09-11 20:27:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:18,818 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 20:27:18,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107181188] [2020-09-11 20:27:18,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056742671] [2020-09-11 20:27:18,819 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 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 20:27:18,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 20:27:18,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:18,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 20:27:18,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:18,902 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 20:27:18,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:18,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 20:27:18,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1234602909] [2020-09-11 20:27:18,903 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:18,904 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:18,909 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-11 20:27:18,909 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:18,919 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:18,920 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:18,967 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:18,968 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:18,969 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24388#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:27:18,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 20:27:18,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:18,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 20:27:18,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-09-11 20:27:18,970 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand 22 states. [2020-09-11 20:27:19,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:19,898 INFO L93 Difference]: Finished difference Result 127 states and 292 transitions. [2020-09-11 20:27:19,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 20:27:19,899 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 20:27:19,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:19,900 INFO L225 Difference]: With dead ends: 127 [2020-09-11 20:27:19,901 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 20:27:19,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=611, Invalid=1741, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 20:27:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 20:27:19,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2020-09-11 20:27:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 20:27:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 190 transitions. [2020-09-11 20:27:19,907 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 190 transitions. Word has length 25 [2020-09-11 20:27:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:19,907 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 190 transitions. [2020-09-11 20:27:19,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 20:27:19,907 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 190 transitions. [2020-09-11 20:27:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 20:27:19,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:19,909 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:20,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-11 20:27:20,118 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:20,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 76 times [2020-09-11 20:27:20,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:20,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464270680] [2020-09-11 20:27:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:20,427 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 20:27:20,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464270680] [2020-09-11 20:27:20,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464491840] [2020-09-11 20:27:20,427 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 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 20:27:20,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:27:20,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:20,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 20:27:20,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:20,511 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 20:27:20,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:20,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 20:27:20,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1386299193] [2020-09-11 20:27:20,512 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:20,514 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:20,518 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-11 20:27:20,519 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:20,528 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:20,529 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:20,572 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:20,572 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:20,573 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24815#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:27:20,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 20:27:20,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:20,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 20:27:20,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-11 20:27:20,574 INFO L87 Difference]: Start difference. First operand 76 states and 190 transitions. Second operand 22 states. [2020-09-11 20:27:21,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:21,635 INFO L93 Difference]: Finished difference Result 125 states and 290 transitions. [2020-09-11 20:27:21,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 20:27:21,636 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 20:27:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:21,637 INFO L225 Difference]: With dead ends: 125 [2020-09-11 20:27:21,637 INFO L226 Difference]: Without dead ends: 119 [2020-09-11 20:27:21,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 20:27:21,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-11 20:27:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2020-09-11 20:27:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 20:27:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 196 transitions. [2020-09-11 20:27:21,641 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 196 transitions. Word has length 25 [2020-09-11 20:27:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:21,641 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 196 transitions. [2020-09-11 20:27:21,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 20:27:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 196 transitions. [2020-09-11 20:27:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 20:27:21,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:21,642 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:21,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:21,851 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:21,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 77 times [2020-09-11 20:27:21,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:21,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115338807] [2020-09-11 20:27:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:22,156 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 20:27:22,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115338807] [2020-09-11 20:27:22,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111098289] [2020-09-11 20:27:22,156 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 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 20:27:22,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 20:27:22,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:22,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 20:27:22,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:22,244 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 20:27:22,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:22,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 20:27:22,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [212924913] [2020-09-11 20:27:22,245 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:22,247 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:22,253 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-11 20:27:22,253 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:22,254 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:22,254 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:22,299 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:22,299 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:22,310 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25248#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:27:22,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 20:27:22,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:22,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 20:27:22,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-09-11 20:27:22,311 INFO L87 Difference]: Start difference. First operand 78 states and 196 transitions. Second operand 22 states. [2020-09-11 20:27:23,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:23,459 INFO L93 Difference]: Finished difference Result 123 states and 288 transitions. [2020-09-11 20:27:23,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 20:27:23,460 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 20:27:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:23,461 INFO L225 Difference]: With dead ends: 123 [2020-09-11 20:27:23,461 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 20:27:23,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=753, Invalid=2003, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 20:27:23,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 20:27:23,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2020-09-11 20:27:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 20:27:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 202 transitions. [2020-09-11 20:27:23,465 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 202 transitions. Word has length 25 [2020-09-11 20:27:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:23,465 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 202 transitions. [2020-09-11 20:27:23,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 20:27:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 202 transitions. [2020-09-11 20:27:23,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 20:27:23,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:23,466 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:23,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:23,674 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:23,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:23,675 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 78 times [2020-09-11 20:27:23,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:23,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449468641] [2020-09-11 20:27:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:23,970 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 20:27:23,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449468641] [2020-09-11 20:27:23,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941844928] [2020-09-11 20:27:23,971 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 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 20:27:24,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 20:27:24,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:24,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 20:27:24,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:24,062 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 20:27:24,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:24,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 20:27:24,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1035897708] [2020-09-11 20:27:24,062 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:24,064 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:24,069 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-11 20:27:24,069 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:24,070 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:24,070 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:24,112 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:24,112 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:24,123 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25687#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-11 20:27:24,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 20:27:24,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:24,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 20:27:24,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 20:27:24,124 INFO L87 Difference]: Start difference. First operand 80 states and 202 transitions. Second operand 22 states. [2020-09-11 20:27:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:25,384 INFO L93 Difference]: Finished difference Result 121 states and 286 transitions. [2020-09-11 20:27:25,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 20:27:25,385 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 20:27:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:25,387 INFO L225 Difference]: With dead ends: 121 [2020-09-11 20:27:25,387 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 20:27:25,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=848, Invalid=2122, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 20:27:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 20:27:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2020-09-11 20:27:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 20:27:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 208 transitions. [2020-09-11 20:27:25,390 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 208 transitions. Word has length 25 [2020-09-11 20:27:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:25,390 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 208 transitions. [2020-09-11 20:27:25,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 20:27:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 208 transitions. [2020-09-11 20:27:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 20:27:25,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:25,391 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:25,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-09-11 20:27:25,597 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:25,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 79 times [2020-09-11 20:27:25,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:25,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815749835] [2020-09-11 20:27:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:25,860 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 20:27:25,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815749835] [2020-09-11 20:27:25,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724866445] [2020-09-11 20:27:25,861 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 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 20:27:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:25,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 20:27:25,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:25,987 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 20:27:25,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:25,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 20:27:25,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1119498454] [2020-09-11 20:27:25,988 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:25,993 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:26,002 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-11 20:27:26,002 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:26,019 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:26,020 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:26,062 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:26,063 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:26,064 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26132#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-11 20:27:26,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 20:27:26,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:26,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 20:27:26,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-09-11 20:27:26,066 INFO L87 Difference]: Start difference. First operand 82 states and 208 transitions. Second operand 22 states. [2020-09-11 20:27:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:27,596 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-09-11 20:27:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 20:27:27,596 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 20:27:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:27,598 INFO L225 Difference]: With dead ends: 121 [2020-09-11 20:27:27,598 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 20:27:27,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=959, Invalid=2233, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 20:27:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 20:27:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2020-09-11 20:27:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-11 20:27:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 216 transitions. [2020-09-11 20:27:27,602 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 216 transitions. Word has length 25 [2020-09-11 20:27:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:27,602 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 216 transitions. [2020-09-11 20:27:27,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 20:27:27,602 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 216 transitions. [2020-09-11 20:27:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 20:27:27,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:27,609 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:27,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:27,818 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:27,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:27,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 80 times [2020-09-11 20:27:27,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:27,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161592811] [2020-09-11 20:27:27,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:28,106 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 20:27:28,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161592811] [2020-09-11 20:27:28,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262945776] [2020-09-11 20:27:28,107 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 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 20:27:28,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:27:28,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:28,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 20:27:28,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:28,195 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 20:27:28,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:28,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 20:27:28,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1348273115] [2020-09-11 20:27:28,196 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:28,198 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:28,204 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-11 20:27:28,204 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:28,205 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:28,205 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:28,249 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:28,250 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:28,259 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26585#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-11 20:27:28,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 20:27:28,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 20:27:28,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-09-11 20:27:28,261 INFO L87 Difference]: Start difference. First operand 84 states and 216 transitions. Second operand 22 states. [2020-09-11 20:27:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:29,647 INFO L93 Difference]: Finished difference Result 122 states and 299 transitions. [2020-09-11 20:27:29,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 20:27:29,648 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 20:27:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:29,650 INFO L225 Difference]: With dead ends: 122 [2020-09-11 20:27:29,650 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 20:27:29,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1084, Invalid=2338, Unknown=0, NotChecked=0, Total=3422 [2020-09-11 20:27:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 20:27:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2020-09-11 20:27:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 20:27:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-11 20:27:29,654 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 25 [2020-09-11 20:27:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:29,662 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-11 20:27:29,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 20:27:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-11 20:27:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 20:27:29,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:29,662 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:29,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:29,863 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:29,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:29,864 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 81 times [2020-09-11 20:27:29,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:29,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106070244] [2020-09-11 20:27:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:30,272 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 20:27:30,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106070244] [2020-09-11 20:27:30,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751523079] [2020-09-11 20:27:30,273 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 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 20:27:30,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 20:27:30,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:30,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 20:27:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:30,365 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 20:27:30,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:30,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 20:27:30,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [748336827] [2020-09-11 20:27:30,367 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:30,370 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:30,378 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 42 transitions. [2020-09-11 20:27:30,378 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:30,393 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:30,393 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:30,441 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:30,442 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:30,443 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27011#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:27:30,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 20:27:30,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:30,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 20:27:30,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:27:30,444 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 23 states. [2020-09-11 20:27:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:31,140 INFO L93 Difference]: Finished difference Result 118 states and 270 transitions. [2020-09-11 20:27:31,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 20:27:31,141 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 20:27:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:31,142 INFO L225 Difference]: With dead ends: 118 [2020-09-11 20:27:31,142 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 20:27:31,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=527, Invalid=1365, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 20:27:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 20:27:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2020-09-11 20:27:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 20:27:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 180 transitions. [2020-09-11 20:27:31,145 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 180 transitions. Word has length 26 [2020-09-11 20:27:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:31,145 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 180 transitions. [2020-09-11 20:27:31,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 20:27:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 180 transitions. [2020-09-11 20:27:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 20:27:31,146 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:31,146 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:31,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:31,347 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:31,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 82 times [2020-09-11 20:27:31,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:31,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563623757] [2020-09-11 20:27:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:31,679 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 20:27:31,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563623757] [2020-09-11 20:27:31,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910575717] [2020-09-11 20:27:31,680 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 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 20:27:31,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:27:31,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:31,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 20:27:31,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:31,764 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 20:27:31,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:31,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 20:27:31,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [58851511] [2020-09-11 20:27:31,764 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:31,766 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:31,772 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-11 20:27:31,772 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:31,773 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:31,773 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:31,822 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:31,823 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:31,837 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27415#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:27:31,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 20:27:31,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:31,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 20:27:31,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:27:31,838 INFO L87 Difference]: Start difference. First operand 73 states and 180 transitions. Second operand 23 states. [2020-09-11 20:27:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:32,688 INFO L93 Difference]: Finished difference Result 115 states and 266 transitions. [2020-09-11 20:27:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 20:27:32,688 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 20:27:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:32,690 INFO L225 Difference]: With dead ends: 115 [2020-09-11 20:27:32,690 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 20:27:32,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 20:27:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 20:27:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2020-09-11 20:27:32,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 20:27:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 186 transitions. [2020-09-11 20:27:32,693 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 186 transitions. Word has length 26 [2020-09-11 20:27:32,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:32,693 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 186 transitions. [2020-09-11 20:27:32,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 20:27:32,694 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 186 transitions. [2020-09-11 20:27:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 20:27:32,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:32,694 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:32,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:32,903 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:32,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 83 times [2020-09-11 20:27:32,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:32,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838772164] [2020-09-11 20:27:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:33,265 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 20:27:33,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838772164] [2020-09-11 20:27:33,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785290644] [2020-09-11 20:27:33,266 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 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 20:27:33,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 20:27:33,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:33,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 20:27:33,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:33,350 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 20:27:33,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:33,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 20:27:33,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [277946911] [2020-09-11 20:27:33,351 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:33,353 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:33,357 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-11 20:27:33,357 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:33,372 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:33,372 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:33,418 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:33,418 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:33,419 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27824#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:27:33,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 20:27:33,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:33,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 20:27:33,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:27:33,420 INFO L87 Difference]: Start difference. First operand 75 states and 186 transitions. Second operand 23 states. [2020-09-11 20:27:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:34,362 INFO L93 Difference]: Finished difference Result 113 states and 264 transitions. [2020-09-11 20:27:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 20:27:34,363 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 20:27:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:34,365 INFO L225 Difference]: With dead ends: 113 [2020-09-11 20:27:34,365 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 20:27:34,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 20:27:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 20:27:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2020-09-11 20:27:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 20:27:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 192 transitions. [2020-09-11 20:27:34,369 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 192 transitions. Word has length 26 [2020-09-11 20:27:34,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:34,369 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 192 transitions. [2020-09-11 20:27:34,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 20:27:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 192 transitions. [2020-09-11 20:27:34,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 20:27:34,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:34,370 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:34,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:34,571 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 84 times [2020-09-11 20:27:34,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:34,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30510397] [2020-09-11 20:27:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:34,932 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 20:27:34,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30510397] [2020-09-11 20:27:34,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064977925] [2020-09-11 20:27:34,933 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 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 20:27:35,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 20:27:35,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:35,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 20:27:35,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:35,021 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 20:27:35,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:35,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 20:27:35,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1714652778] [2020-09-11 20:27:35,022 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:35,024 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:35,030 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-11 20:27:35,030 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:35,031 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:35,031 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:35,078 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:35,079 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:35,092 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28239#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:27:35,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 20:27:35,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:35,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 20:27:35,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:27:35,093 INFO L87 Difference]: Start difference. First operand 77 states and 192 transitions. Second operand 23 states. [2020-09-11 20:27:36,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:36,143 INFO L93 Difference]: Finished difference Result 111 states and 262 transitions. [2020-09-11 20:27:36,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 20:27:36,144 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 20:27:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:36,145 INFO L225 Difference]: With dead ends: 111 [2020-09-11 20:27:36,145 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 20:27:36,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1827, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 20:27:36,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 20:27:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2020-09-11 20:27:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 20:27:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 198 transitions. [2020-09-11 20:27:36,149 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 198 transitions. Word has length 26 [2020-09-11 20:27:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:36,149 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 198 transitions. [2020-09-11 20:27:36,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 20:27:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 198 transitions. [2020-09-11 20:27:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 20:27:36,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:36,150 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:36,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:36,361 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:36,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 85 times [2020-09-11 20:27:36,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:36,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943405876] [2020-09-11 20:27:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:36,701 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 20:27:36,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943405876] [2020-09-11 20:27:36,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185980102] [2020-09-11 20:27:36,702 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 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 20:27:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:36,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 20:27:36,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:27:36,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:36,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 20:27:36,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [692314292] [2020-09-11 20:27:36,786 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:36,788 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:36,793 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-11 20:27:36,793 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:36,794 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:36,794 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:36,843 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:36,843 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:36,858 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28660#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-11 20:27:36,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 20:27:36,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:36,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 20:27:36,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:27:36,859 INFO L87 Difference]: Start difference. First operand 79 states and 198 transitions. Second operand 23 states. [2020-09-11 20:27:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:38,013 INFO L93 Difference]: Finished difference Result 109 states and 260 transitions. [2020-09-11 20:27:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 20:27:38,014 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 20:27:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:38,015 INFO L225 Difference]: With dead ends: 109 [2020-09-11 20:27:38,015 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 20:27:38,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=687, Invalid=1965, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 20:27:38,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 20:27:38,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2020-09-11 20:27:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 20:27:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 204 transitions. [2020-09-11 20:27:38,018 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 204 transitions. Word has length 26 [2020-09-11 20:27:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:38,018 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 204 transitions. [2020-09-11 20:27:38,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 20:27:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 204 transitions. [2020-09-11 20:27:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 20:27:38,019 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:38,019 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:38,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-11 20:27:38,220 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:38,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 86 times [2020-09-11 20:27:38,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:38,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676742898] [2020-09-11 20:27:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:38,538 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 20:27:38,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676742898] [2020-09-11 20:27:38,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806771646] [2020-09-11 20:27:38,539 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 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 20:27:38,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:27:38,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:38,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 20:27:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:38,641 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 20:27:38,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:38,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 20:27:38,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1026910265] [2020-09-11 20:27:38,642 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:38,645 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:38,652 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-11 20:27:38,652 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:38,653 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:38,653 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:38,693 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:38,693 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:38,709 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29087#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-11 20:27:38,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 20:27:38,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:38,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 20:27:38,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:27:38,710 INFO L87 Difference]: Start difference. First operand 81 states and 204 transitions. Second operand 23 states. [2020-09-11 20:27:39,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:39,976 INFO L93 Difference]: Finished difference Result 107 states and 258 transitions. [2020-09-11 20:27:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 20:27:39,977 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 20:27:39,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:39,978 INFO L225 Difference]: With dead ends: 107 [2020-09-11 20:27:39,978 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 20:27:39,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=767, Invalid=2095, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 20:27:39,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 20:27:39,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-09-11 20:27:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 20:27:39,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 210 transitions. [2020-09-11 20:27:39,981 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 210 transitions. Word has length 26 [2020-09-11 20:27:39,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:39,981 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 210 transitions. [2020-09-11 20:27:39,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 20:27:39,982 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 210 transitions. [2020-09-11 20:27:39,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 20:27:39,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:39,982 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:40,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:40,186 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:40,187 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 87 times [2020-09-11 20:27:40,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:40,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233944570] [2020-09-11 20:27:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:40,462 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 20:27:40,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233944570] [2020-09-11 20:27:40,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104223702] [2020-09-11 20:27:40,463 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 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 20:27:40,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 20:27:40,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:40,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 20:27:40,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:40,594 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 20:27:40,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:40,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 20:27:40,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [592998923] [2020-09-11 20:27:40,595 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:40,599 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:40,606 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-11 20:27:40,606 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:40,607 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:40,608 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:40,663 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:40,663 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:40,681 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29520#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-11 20:27:40,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 20:27:40,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:40,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 20:27:40,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:27:40,682 INFO L87 Difference]: Start difference. First operand 83 states and 210 transitions. Second operand 23 states. [2020-09-11 20:27:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:41,967 INFO L93 Difference]: Finished difference Result 105 states and 256 transitions. [2020-09-11 20:27:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 20:27:41,967 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 20:27:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:41,969 INFO L225 Difference]: With dead ends: 105 [2020-09-11 20:27:41,969 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 20:27:41,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=2217, Unknown=0, NotChecked=0, Total=3080 [2020-09-11 20:27:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 20:27:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2020-09-11 20:27:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-11 20:27:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 216 transitions. [2020-09-11 20:27:41,972 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 216 transitions. Word has length 26 [2020-09-11 20:27:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:41,973 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 216 transitions. [2020-09-11 20:27:41,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 20:27:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 216 transitions. [2020-09-11 20:27:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 20:27:41,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:41,973 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:42,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-11 20:27:42,182 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:42,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:42,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 88 times [2020-09-11 20:27:42,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:42,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597806159] [2020-09-11 20:27:42,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:27:42,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597806159] [2020-09-11 20:27:42,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193990658] [2020-09-11 20:27:42,496 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 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 20:27:42,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:27:42,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 20:27:42,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:42,588 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 20:27:42,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:42,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 20:27:42,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1342457940] [2020-09-11 20:27:42,589 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:42,591 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:42,596 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-11 20:27:42,596 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:42,597 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:42,597 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:42,643 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:42,643 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:42,657 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29959#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-11 20:27:42,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 20:27:42,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:42,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 20:27:42,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:27:42,658 INFO L87 Difference]: Start difference. First operand 85 states and 216 transitions. Second operand 23 states. [2020-09-11 20:27:44,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:44,106 INFO L93 Difference]: Finished difference Result 105 states and 259 transitions. [2020-09-11 20:27:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 20:27:44,107 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 20:27:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:44,108 INFO L225 Difference]: With dead ends: 105 [2020-09-11 20:27:44,108 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 20:27:44,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=975, Invalid=2331, Unknown=0, NotChecked=0, Total=3306 [2020-09-11 20:27:44,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 20:27:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-09-11 20:27:44,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 20:27:44,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 224 transitions. [2020-09-11 20:27:44,111 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 224 transitions. Word has length 26 [2020-09-11 20:27:44,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:44,112 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 224 transitions. [2020-09-11 20:27:44,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 20:27:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 224 transitions. [2020-09-11 20:27:44,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 20:27:44,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:44,113 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:44,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-11 20:27:44,321 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:44,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 89 times [2020-09-11 20:27:44,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:44,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107654189] [2020-09-11 20:27:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:44,610 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 20:27:44,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107654189] [2020-09-11 20:27:44,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966246923] [2020-09-11 20:27:44,611 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 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 20:27:44,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 20:27:44,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:44,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 20:27:44,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:44,703 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 20:27:44,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:44,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 20:27:44,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [528702821] [2020-09-11 20:27:44,704 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:44,706 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:44,711 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-11 20:27:44,711 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:44,712 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:44,712 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:44,768 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:44,769 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:44,784 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30406#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-11 20:27:44,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 20:27:44,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:44,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 20:27:44,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:27:44,785 INFO L87 Difference]: Start difference. First operand 87 states and 224 transitions. Second operand 23 states. [2020-09-11 20:27:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:46,315 INFO L93 Difference]: Finished difference Result 105 states and 267 transitions. [2020-09-11 20:27:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 20:27:46,316 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 20:27:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:46,317 INFO L225 Difference]: With dead ends: 105 [2020-09-11 20:27:46,317 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 20:27:46,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1101, Invalid=2439, Unknown=0, NotChecked=0, Total=3540 [2020-09-11 20:27:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 20:27:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-09-11 20:27:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 20:27:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-11 20:27:46,321 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 26 [2020-09-11 20:27:46,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:46,321 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-11 20:27:46,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 20:27:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-11 20:27:46,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 20:27:46,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:46,322 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:46,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:46,533 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:46,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:46,534 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 90 times [2020-09-11 20:27:46,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:46,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536561860] [2020-09-11 20:27:46,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:46,965 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 20:27:46,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536561860] [2020-09-11 20:27:46,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582480826] [2020-09-11 20:27:46,966 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 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 20:27:47,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-11 20:27:47,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:47,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 20:27:47,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:47,067 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 20:27:47,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:47,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 20:27:47,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1174775104] [2020-09-11 20:27:47,067 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:47,070 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:47,078 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2020-09-11 20:27:47,078 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:47,086 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:47,086 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:47,114 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:47,114 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:47,137 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:47,137 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:47,146 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:47,146 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:47,159 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:47,160 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:47,164 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:47,164 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:47,187 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:47,187 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:47,195 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:47,196 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:47,207 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30819#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-11 20:27:47,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 20:27:47,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:47,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 20:27:47,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:27:47,208 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 24 states. [2020-09-11 20:27:48,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:48,098 INFO L93 Difference]: Finished difference Result 102 states and 238 transitions. [2020-09-11 20:27:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 20:27:48,099 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 20:27:48,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:48,100 INFO L225 Difference]: With dead ends: 102 [2020-09-11 20:27:48,100 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 20:27:48,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=577, Invalid=1403, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 20:27:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 20:27:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-11 20:27:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 20:27:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-09-11 20:27:48,103 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 27 [2020-09-11 20:27:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:48,104 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-09-11 20:27:48,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 20:27:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-09-11 20:27:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 20:27:48,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:48,105 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:48,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:48,305 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:48,306 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 91 times [2020-09-11 20:27:48,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:48,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654789569] [2020-09-11 20:27:48,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:48,770 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 20:27:48,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654789569] [2020-09-11 20:27:48,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611368045] [2020-09-11 20:27:48,771 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 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 20:27:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 20:27:48,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:48,867 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 20:27:48,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:48,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 20:27:48,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1134090946] [2020-09-11 20:27:48,868 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:48,875 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:48,886 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-11 20:27:48,886 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:48,887 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:48,888 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:48,945 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:48,945 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:48,960 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31213#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-11 20:27:48,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 20:27:48,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:48,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 20:27:48,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:27:48,961 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 24 states. [2020-09-11 20:27:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:49,845 INFO L93 Difference]: Finished difference Result 142 states and 320 transitions. [2020-09-11 20:27:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 20:27:49,845 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 20:27:49,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:49,847 INFO L225 Difference]: With dead ends: 142 [2020-09-11 20:27:49,847 INFO L226 Difference]: Without dead ends: 136 [2020-09-11 20:27:49,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1716, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 20:27:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-11 20:27:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 76. [2020-09-11 20:27:49,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 20:27:49,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 188 transitions. [2020-09-11 20:27:49,851 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 188 transitions. Word has length 27 [2020-09-11 20:27:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:49,851 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 188 transitions. [2020-09-11 20:27:49,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 20:27:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 188 transitions. [2020-09-11 20:27:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 20:27:49,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:49,852 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:50,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:50,063 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:50,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 92 times [2020-09-11 20:27:50,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:50,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129880499] [2020-09-11 20:27:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:50,472 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 20:27:50,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129880499] [2020-09-11 20:27:50,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596075419] [2020-09-11 20:27:50,473 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 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 20:27:50,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:27:50,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:50,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 20:27:50,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:50,560 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 20:27:50,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:50,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 20:27:50,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [245557595] [2020-09-11 20:27:50,561 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:50,564 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:50,576 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-11 20:27:50,577 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:50,578 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:50,578 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:50,617 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:50,617 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:50,633 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31659#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:27:50,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 20:27:50,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:50,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 20:27:50,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:27:50,634 INFO L87 Difference]: Start difference. First operand 76 states and 188 transitions. Second operand 24 states. [2020-09-11 20:27:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:51,643 INFO L93 Difference]: Finished difference Result 139 states and 316 transitions. [2020-09-11 20:27:51,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 20:27:51,645 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 20:27:51,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:51,645 INFO L225 Difference]: With dead ends: 139 [2020-09-11 20:27:51,646 INFO L226 Difference]: Without dead ends: 133 [2020-09-11 20:27:51,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=665, Invalid=1885, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 20:27:51,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-11 20:27:51,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 78. [2020-09-11 20:27:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 20:27:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 194 transitions. [2020-09-11 20:27:51,648 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 194 transitions. Word has length 27 [2020-09-11 20:27:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:51,648 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 194 transitions. [2020-09-11 20:27:51,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 20:27:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 194 transitions. [2020-09-11 20:27:51,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 20:27:51,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:51,649 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:51,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-09-11 20:27:51,857 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:51,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 93 times [2020-09-11 20:27:51,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:51,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771226567] [2020-09-11 20:27:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:52,259 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 20:27:52,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771226567] [2020-09-11 20:27:52,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812692971] [2020-09-11 20:27:52,260 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 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 20:27:52,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-11 20:27:52,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 20:27:52,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:52,353 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 20:27:52,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:52,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 20:27:52,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1064311828] [2020-09-11 20:27:52,354 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:52,357 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:52,363 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-11 20:27:52,364 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:52,365 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:52,365 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:52,408 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:52,408 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:52,419 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32110#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:27:52,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 20:27:52,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:52,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 20:27:52,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:27:52,420 INFO L87 Difference]: Start difference. First operand 78 states and 194 transitions. Second operand 24 states. [2020-09-11 20:27:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:53,529 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2020-09-11 20:27:53,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 20:27:53,530 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 20:27:53,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:53,531 INFO L225 Difference]: With dead ends: 137 [2020-09-11 20:27:53,531 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 20:27:53,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=710, Invalid=2046, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 20:27:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 20:27:53,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 80. [2020-09-11 20:27:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 20:27:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 200 transitions. [2020-09-11 20:27:53,535 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 200 transitions. Word has length 27 [2020-09-11 20:27:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:53,535 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 200 transitions. [2020-09-11 20:27:53,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 20:27:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 200 transitions. [2020-09-11 20:27:53,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 20:27:53,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:53,536 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:53,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:53,737 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:53,737 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 94 times [2020-09-11 20:27:53,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:53,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178396417] [2020-09-11 20:27:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:54,114 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 20:27:54,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178396417] [2020-09-11 20:27:54,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508887503] [2020-09-11 20:27:54,115 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 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 20:27:54,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:27:54,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:54,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 20:27:54,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:54,202 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 20:27:54,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:54,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 20:27:54,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [380208588] [2020-09-11 20:27:54,203 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:54,205 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:54,210 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-11 20:27:54,210 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:54,211 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:54,211 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:54,256 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:54,256 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:54,269 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32567#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:27:54,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 20:27:54,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:54,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 20:27:54,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:27:54,270 INFO L87 Difference]: Start difference. First operand 80 states and 200 transitions. Second operand 24 states. [2020-09-11 20:27:55,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:55,490 INFO L93 Difference]: Finished difference Result 135 states and 312 transitions. [2020-09-11 20:27:55,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 20:27:55,491 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 20:27:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:55,493 INFO L225 Difference]: With dead ends: 135 [2020-09-11 20:27:55,493 INFO L226 Difference]: Without dead ends: 129 [2020-09-11 20:27:55,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=771, Invalid=2199, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 20:27:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-11 20:27:55,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2020-09-11 20:27:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 20:27:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2020-09-11 20:27:55,497 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 27 [2020-09-11 20:27:55,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:55,497 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2020-09-11 20:27:55,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 20:27:55,497 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2020-09-11 20:27:55,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 20:27:55,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:55,498 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:55,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-11 20:27:55,699 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:55,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:55,699 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 95 times [2020-09-11 20:27:55,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:55,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007183167] [2020-09-11 20:27:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:56,067 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 20:27:56,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007183167] [2020-09-11 20:27:56,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18806721] [2020-09-11 20:27:56,068 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 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 20:27:56,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-11 20:27:56,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 20:27:56,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:56,159 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 20:27:56,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:56,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 20:27:56,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [857155350] [2020-09-11 20:27:56,160 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:56,163 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:56,170 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-11 20:27:56,170 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:56,171 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:56,171 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:56,213 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:56,213 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:56,223 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33030#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:27:56,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 20:27:56,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:56,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 20:27:56,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:27:56,225 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 24 states. [2020-09-11 20:27:57,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:57,480 INFO L93 Difference]: Finished difference Result 133 states and 310 transitions. [2020-09-11 20:27:57,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 20:27:57,481 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 20:27:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:57,482 INFO L225 Difference]: With dead ends: 133 [2020-09-11 20:27:57,482 INFO L226 Difference]: Without dead ends: 127 [2020-09-11 20:27:57,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=848, Invalid=2344, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 20:27:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-11 20:27:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2020-09-11 20:27:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-11 20:27:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 212 transitions. [2020-09-11 20:27:57,487 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 212 transitions. Word has length 27 [2020-09-11 20:27:57,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:57,487 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 212 transitions. [2020-09-11 20:27:57,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 20:27:57,487 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 212 transitions. [2020-09-11 20:27:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 20:27:57,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:57,488 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:57,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:57,699 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:57,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:57,700 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 96 times [2020-09-11 20:27:57,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:57,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344095485] [2020-09-11 20:27:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:27:58,062 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 20:27:58,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344095485] [2020-09-11 20:27:58,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945377229] [2020-09-11 20:27:58,063 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 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 20:27:58,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-11 20:27:58,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:27:58,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 20:27:58,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:27:58,165 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 20:27:58,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:27:58,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 20:27:58,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1268806377] [2020-09-11 20:27:58,166 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:27:58,168 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:27:58,174 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-11 20:27:58,174 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:27:58,189 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:58,189 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:58,234 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:27:58,234 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:27:58,235 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33499#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-11 20:27:58,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 20:27:58,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:27:58,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 20:27:58,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:27:58,235 INFO L87 Difference]: Start difference. First operand 84 states and 212 transitions. Second operand 24 states. [2020-09-11 20:27:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:27:59,651 INFO L93 Difference]: Finished difference Result 131 states and 308 transitions. [2020-09-11 20:27:59,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 20:27:59,652 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 20:27:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:27:59,653 INFO L225 Difference]: With dead ends: 131 [2020-09-11 20:27:59,653 INFO L226 Difference]: Without dead ends: 125 [2020-09-11 20:27:59,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=941, Invalid=2481, Unknown=0, NotChecked=0, Total=3422 [2020-09-11 20:27:59,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-11 20:27:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-11 20:27:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 20:27:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 218 transitions. [2020-09-11 20:27:59,657 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 218 transitions. Word has length 27 [2020-09-11 20:27:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:27:59,657 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 218 transitions. [2020-09-11 20:27:59,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 20:27:59,657 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 218 transitions. [2020-09-11 20:27:59,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 20:27:59,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:27:59,658 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:27:59,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:27:59,867 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:27:59,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:27:59,868 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 97 times [2020-09-11 20:27:59,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:27:59,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731447622] [2020-09-11 20:27:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:27:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:00,220 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 20:28:00,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731447622] [2020-09-11 20:28:00,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077222476] [2020-09-11 20:28:00,220 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 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 20:28:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:00,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 20:28:00,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:00,299 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 20:28:00,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:00,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 20:28:00,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1117336551] [2020-09-11 20:28:00,301 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:00,304 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:00,309 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-11 20:28:00,309 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:00,310 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:00,310 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:00,355 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:00,356 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:00,367 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33974#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-11 20:28:00,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 20:28:00,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:00,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 20:28:00,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:28:00,368 INFO L87 Difference]: Start difference. First operand 86 states and 218 transitions. Second operand 24 states. [2020-09-11 20:28:01,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:01,886 INFO L93 Difference]: Finished difference Result 129 states and 306 transitions. [2020-09-11 20:28:01,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-11 20:28:01,887 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 20:28:01,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:01,888 INFO L225 Difference]: With dead ends: 129 [2020-09-11 20:28:01,888 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 20:28:01,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1050, Invalid=2610, Unknown=0, NotChecked=0, Total=3660 [2020-09-11 20:28:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 20:28:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2020-09-11 20:28:01,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 20:28:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 224 transitions. [2020-09-11 20:28:01,891 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 224 transitions. Word has length 27 [2020-09-11 20:28:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:01,891 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 224 transitions. [2020-09-11 20:28:01,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 20:28:01,892 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 224 transitions. [2020-09-11 20:28:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 20:28:01,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:01,892 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:02,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-09-11 20:28:02,094 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:02,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:02,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 98 times [2020-09-11 20:28:02,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:02,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209801631] [2020-09-11 20:28:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:02,446 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 20:28:02,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209801631] [2020-09-11 20:28:02,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428489326] [2020-09-11 20:28:02,447 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 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 20:28:02,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:28:02,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:02,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 20:28:02,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:02,539 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 20:28:02,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:02,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 20:28:02,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1797029008] [2020-09-11 20:28:02,540 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:02,542 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:02,548 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-11 20:28:02,548 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:02,559 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:02,560 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:02,606 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:02,606 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:02,607 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34455#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-11 20:28:02,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 20:28:02,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:02,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 20:28:02,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:28:02,608 INFO L87 Difference]: Start difference. First operand 88 states and 224 transitions. Second operand 24 states. [2020-09-11 20:28:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:04,222 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-09-11 20:28:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-11 20:28:04,223 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 20:28:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:04,225 INFO L225 Difference]: With dead ends: 129 [2020-09-11 20:28:04,225 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 20:28:04,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1175, Invalid=2731, Unknown=0, NotChecked=0, Total=3906 [2020-09-11 20:28:04,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 20:28:04,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 90. [2020-09-11 20:28:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-11 20:28:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 232 transitions. [2020-09-11 20:28:04,228 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 232 transitions. Word has length 27 [2020-09-11 20:28:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:04,228 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 232 transitions. [2020-09-11 20:28:04,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 20:28:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 232 transitions. [2020-09-11 20:28:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 20:28:04,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:04,229 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:04,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-09-11 20:28:04,432 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:04,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:04,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 99 times [2020-09-11 20:28:04,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:04,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832714151] [2020-09-11 20:28:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:04,751 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 20:28:04,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832714151] [2020-09-11 20:28:04,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185006170] [2020-09-11 20:28:04,752 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 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 20:28:04,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-11 20:28:04,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:04,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 20:28:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:04,866 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 20:28:04,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:04,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 20:28:04,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [166742450] [2020-09-11 20:28:04,867 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:04,874 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:04,882 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-11 20:28:04,882 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:04,883 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:04,884 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:04,923 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:04,923 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:04,935 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34944#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-11 20:28:04,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 20:28:04,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:04,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 20:28:04,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:28:04,936 INFO L87 Difference]: Start difference. First operand 90 states and 232 transitions. Second operand 24 states. [2020-09-11 20:28:06,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:06,658 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-09-11 20:28:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-11 20:28:06,659 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 20:28:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:06,660 INFO L225 Difference]: With dead ends: 130 [2020-09-11 20:28:06,660 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 20:28:06,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1314, Invalid=2846, Unknown=0, NotChecked=0, Total=4160 [2020-09-11 20:28:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 20:28:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 70. [2020-09-11 20:28:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 20:28:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-11 20:28:06,668 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 27 [2020-09-11 20:28:06,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:06,668 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-11 20:28:06,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 20:28:06,668 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-11 20:28:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-11 20:28:06,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:06,669 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:06,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:28:06,870 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 100 times [2020-09-11 20:28:06,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:06,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093675724] [2020-09-11 20:28:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:07,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093675724] [2020-09-11 20:28:07,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291458676] [2020-09-11 20:28:07,351 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 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 20:28:07,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:28:07,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:07,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-11 20:28:07,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:07,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:07,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-11 20:28:07,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [703248129] [2020-09-11 20:28:07,432 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:07,434 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:07,440 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 44 transitions. [2020-09-11 20:28:07,440 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:07,457 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:07,457 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:07,508 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:07,508 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:07,509 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35402#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:28:07,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-11 20:28:07,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:07,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-11 20:28:07,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:28:07,510 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 25 states. [2020-09-11 20:28:08,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:08,391 INFO L93 Difference]: Finished difference Result 126 states and 288 transitions. [2020-09-11 20:28:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 20:28:08,392 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-11 20:28:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:08,393 INFO L225 Difference]: With dead ends: 126 [2020-09-11 20:28:08,393 INFO L226 Difference]: Without dead ends: 120 [2020-09-11 20:28:08,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=632, Invalid=1624, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 20:28:08,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-11 20:28:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 77. [2020-09-11 20:28:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 20:28:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-09-11 20:28:08,396 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 28 [2020-09-11 20:28:08,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:08,397 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-09-11 20:28:08,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-11 20:28:08,397 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-09-11 20:28:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-11 20:28:08,397 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:08,398 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:08,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-11 20:28:08,602 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 101 times [2020-09-11 20:28:08,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:08,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195103361] [2020-09-11 20:28:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:09,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195103361] [2020-09-11 20:28:09,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414458584] [2020-09-11 20:28:09,066 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 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 20:28:09,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-11 20:28:09,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:09,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-11 20:28:09,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:09,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:09,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-11 20:28:09,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [537048950] [2020-09-11 20:28:09,152 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:09,153 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:09,159 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-11 20:28:09,159 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:09,179 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:09,179 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:09,229 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:09,229 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:09,230 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35834#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:28:09,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-11 20:28:09,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:09,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-11 20:28:09,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:28:09,231 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 25 states. [2020-09-11 20:28:10,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:10,199 INFO L93 Difference]: Finished difference Result 123 states and 284 transitions. [2020-09-11 20:28:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 20:28:10,200 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-11 20:28:10,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:10,200 INFO L225 Difference]: With dead ends: 123 [2020-09-11 20:28:10,200 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 20:28:10,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 20:28:10,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 20:28:10,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-11 20:28:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 20:28:10,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 196 transitions. [2020-09-11 20:28:10,203 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 196 transitions. Word has length 28 [2020-09-11 20:28:10,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:10,204 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 196 transitions. [2020-09-11 20:28:10,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-11 20:28:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 196 transitions. [2020-09-11 20:28:10,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-11 20:28:10,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:10,205 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:10,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-11 20:28:10,413 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:10,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:10,414 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 102 times [2020-09-11 20:28:10,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:10,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41313603] [2020-09-11 20:28:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:10,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41313603] [2020-09-11 20:28:10,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642634412] [2020-09-11 20:28:10,830 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 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 20:28:10,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-11 20:28:10,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:10,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-11 20:28:10,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:10,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:10,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-11 20:28:10,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [416779720] [2020-09-11 20:28:10,920 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:10,922 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:10,930 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-11 20:28:10,931 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:10,932 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:10,932 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:10,981 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:10,981 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:11,001 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36271#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:28:11,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-11 20:28:11,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-11 20:28:11,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:28:11,002 INFO L87 Difference]: Start difference. First operand 79 states and 196 transitions. Second operand 25 states. [2020-09-11 20:28:12,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:12,101 INFO L93 Difference]: Finished difference Result 121 states and 282 transitions. [2020-09-11 20:28:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 20:28:12,102 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-11 20:28:12,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:12,103 INFO L225 Difference]: With dead ends: 121 [2020-09-11 20:28:12,103 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 20:28:12,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=676, Invalid=1976, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 20:28:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 20:28:12,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-11 20:28:12,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 20:28:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2020-09-11 20:28:12,106 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 28 [2020-09-11 20:28:12,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:12,106 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2020-09-11 20:28:12,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-11 20:28:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2020-09-11 20:28:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-11 20:28:12,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:12,107 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:12,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-11 20:28:12,308 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:12,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 103 times [2020-09-11 20:28:12,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:12,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452918187] [2020-09-11 20:28:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:12,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452918187] [2020-09-11 20:28:12,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372986795] [2020-09-11 20:28:12,721 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 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 20:28:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:12,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-11 20:28:12,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:12,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:12,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-11 20:28:12,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [453443880] [2020-09-11 20:28:12,808 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:12,809 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:12,815 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-11 20:28:12,816 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:12,830 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:12,831 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:12,882 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:12,882 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:12,883 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36714#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:28:12,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-11 20:28:12,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:12,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-11 20:28:12,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:28:12,884 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 25 states. [2020-09-11 20:28:14,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:14,078 INFO L93 Difference]: Finished difference Result 119 states and 280 transitions. [2020-09-11 20:28:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 20:28:14,080 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-11 20:28:14,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:14,080 INFO L225 Difference]: With dead ends: 119 [2020-09-11 20:28:14,080 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 20:28:14,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=722, Invalid=2140, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 20:28:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 20:28:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-11 20:28:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 20:28:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 208 transitions. [2020-09-11 20:28:14,083 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 208 transitions. Word has length 28 [2020-09-11 20:28:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:14,083 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 208 transitions. [2020-09-11 20:28:14,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-11 20:28:14,083 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 208 transitions. [2020-09-11 20:28:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-11 20:28:14,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:14,084 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:14,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:28:14,286 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:14,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 104 times [2020-09-11 20:28:14,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:14,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349110516] [2020-09-11 20:28:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:14,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349110516] [2020-09-11 20:28:14,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681463568] [2020-09-11 20:28:14,693 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 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 20:28:14,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:28:14,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:14,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-11 20:28:14,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:14,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:14,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-11 20:28:14,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [489600289] [2020-09-11 20:28:14,792 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:14,794 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:14,802 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-11 20:28:14,803 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:14,817 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:14,817 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:14,859 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:14,859 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:14,860 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37163#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-11 20:28:14,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-11 20:28:14,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:14,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-11 20:28:14,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:28:14,861 INFO L87 Difference]: Start difference. First operand 83 states and 208 transitions. Second operand 25 states. [2020-09-11 20:28:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:16,171 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-09-11 20:28:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 20:28:16,172 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-11 20:28:16,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:16,173 INFO L225 Difference]: With dead ends: 117 [2020-09-11 20:28:16,173 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 20:28:16,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=784, Invalid=2296, Unknown=0, NotChecked=0, Total=3080 [2020-09-11 20:28:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 20:28:16,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2020-09-11 20:28:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-11 20:28:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 214 transitions. [2020-09-11 20:28:16,178 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 214 transitions. Word has length 28 [2020-09-11 20:28:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:16,178 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 214 transitions. [2020-09-11 20:28:16,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-11 20:28:16,179 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 214 transitions. [2020-09-11 20:28:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-11 20:28:16,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:16,179 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:16,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-11 20:28:16,389 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:16,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 105 times [2020-09-11 20:28:16,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:16,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585834335] [2020-09-11 20:28:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:16,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585834335] [2020-09-11 20:28:16,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807761915] [2020-09-11 20:28:16,790 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 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 20:28:16,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-11 20:28:16,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:16,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-11 20:28:16,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:16,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:16,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-11 20:28:16,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1354096827] [2020-09-11 20:28:16,883 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:16,884 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:16,890 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-11 20:28:16,890 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:16,891 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:16,891 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:16,941 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:16,941 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:16,956 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37618#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-11 20:28:16,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-11 20:28:16,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-11 20:28:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:28:16,957 INFO L87 Difference]: Start difference. First operand 85 states and 214 transitions. Second operand 25 states. [2020-09-11 20:28:18,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:18,390 INFO L93 Difference]: Finished difference Result 115 states and 276 transitions. [2020-09-11 20:28:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 20:28:18,391 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-11 20:28:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:18,392 INFO L225 Difference]: With dead ends: 115 [2020-09-11 20:28:18,392 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 20:28:18,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=862, Invalid=2444, Unknown=0, NotChecked=0, Total=3306 [2020-09-11 20:28:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 20:28:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2020-09-11 20:28:18,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 20:28:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 220 transitions. [2020-09-11 20:28:18,396 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 220 transitions. Word has length 28 [2020-09-11 20:28:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:18,396 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 220 transitions. [2020-09-11 20:28:18,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-11 20:28:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 220 transitions. [2020-09-11 20:28:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-11 20:28:18,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:18,396 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:18,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-09-11 20:28:18,597 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:18,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:18,598 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 106 times [2020-09-11 20:28:18,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:18,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139025086] [2020-09-11 20:28:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:18,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139025086] [2020-09-11 20:28:18,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437961025] [2020-09-11 20:28:18,997 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 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 20:28:19,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:28:19,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:19,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-11 20:28:19,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:19,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:19,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-11 20:28:19,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1255427113] [2020-09-11 20:28:19,089 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:19,090 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:19,096 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-11 20:28:19,096 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:19,097 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:19,097 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:19,147 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:19,148 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:19,162 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38079#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-11 20:28:19,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-11 20:28:19,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:19,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-11 20:28:19,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:28:19,163 INFO L87 Difference]: Start difference. First operand 87 states and 220 transitions. Second operand 25 states. [2020-09-11 20:28:20,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:20,704 INFO L93 Difference]: Finished difference Result 113 states and 274 transitions. [2020-09-11 20:28:20,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 20:28:20,706 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-11 20:28:20,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:20,706 INFO L225 Difference]: With dead ends: 113 [2020-09-11 20:28:20,706 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 20:28:20,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=956, Invalid=2584, Unknown=0, NotChecked=0, Total=3540 [2020-09-11 20:28:20,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 20:28:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2020-09-11 20:28:20,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-11 20:28:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 226 transitions. [2020-09-11 20:28:20,709 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 226 transitions. Word has length 28 [2020-09-11 20:28:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:20,710 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 226 transitions. [2020-09-11 20:28:20,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-11 20:28:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 226 transitions. [2020-09-11 20:28:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-11 20:28:20,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:20,710 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:20,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-11 20:28:20,911 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:20,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 107 times [2020-09-11 20:28:20,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:20,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044139638] [2020-09-11 20:28:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:21,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044139638] [2020-09-11 20:28:21,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475109153] [2020-09-11 20:28:21,301 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 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 20:28:21,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-11 20:28:21,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:21,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-11 20:28:21,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:21,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:21,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-11 20:28:21,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1237318659] [2020-09-11 20:28:21,399 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:21,400 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:21,406 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-11 20:28:21,407 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:21,421 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:21,421 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:21,471 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:21,471 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:21,473 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38546#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-11 20:28:21,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-11 20:28:21,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:21,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-11 20:28:21,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:28:21,474 INFO L87 Difference]: Start difference. First operand 89 states and 226 transitions. Second operand 25 states. [2020-09-11 20:28:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:23,144 INFO L93 Difference]: Finished difference Result 111 states and 272 transitions. [2020-09-11 20:28:23,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-11 20:28:23,145 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-11 20:28:23,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:23,146 INFO L225 Difference]: With dead ends: 111 [2020-09-11 20:28:23,146 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 20:28:23,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1066, Invalid=2716, Unknown=0, NotChecked=0, Total=3782 [2020-09-11 20:28:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 20:28:23,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-11 20:28:23,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-11 20:28:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 232 transitions. [2020-09-11 20:28:23,149 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 232 transitions. Word has length 28 [2020-09-11 20:28:23,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:23,149 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 232 transitions. [2020-09-11 20:28:23,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-11 20:28:23,149 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 232 transitions. [2020-09-11 20:28:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-11 20:28:23,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:23,150 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:23,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:28:23,350 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:23,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:23,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 108 times [2020-09-11 20:28:23,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:23,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386627462] [2020-09-11 20:28:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:23,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386627462] [2020-09-11 20:28:23,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106279377] [2020-09-11 20:28:23,717 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 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 20:28:23,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-11 20:28:23,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:23,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-11 20:28:23,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:23,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:23,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-11 20:28:23,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1810633253] [2020-09-11 20:28:23,815 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:23,817 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:23,825 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-11 20:28:23,826 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:23,830 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:23,834 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:23,876 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:23,876 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:23,890 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39019#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-11 20:28:23,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-11 20:28:23,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:23,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-11 20:28:23,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:28:23,891 INFO L87 Difference]: Start difference. First operand 91 states and 232 transitions. Second operand 25 states. [2020-09-11 20:28:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:25,636 INFO L93 Difference]: Finished difference Result 111 states and 275 transitions. [2020-09-11 20:28:25,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-11 20:28:25,637 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-11 20:28:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:25,637 INFO L225 Difference]: With dead ends: 111 [2020-09-11 20:28:25,637 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 20:28:25,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1192, Invalid=2840, Unknown=0, NotChecked=0, Total=4032 [2020-09-11 20:28:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 20:28:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-09-11 20:28:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-11 20:28:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 240 transitions. [2020-09-11 20:28:25,640 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 240 transitions. Word has length 28 [2020-09-11 20:28:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:25,640 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 240 transitions. [2020-09-11 20:28:25,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-11 20:28:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 240 transitions. [2020-09-11 20:28:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-11 20:28:25,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:25,641 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:25,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:28:25,842 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:25,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:25,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 109 times [2020-09-11 20:28:25,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:25,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85658429] [2020-09-11 20:28:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:26,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85658429] [2020-09-11 20:28:26,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97570807] [2020-09-11 20:28:26,218 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 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 20:28:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-11 20:28:26,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:26,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:26,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-11 20:28:26,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1042619524] [2020-09-11 20:28:26,314 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:26,315 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:26,322 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-11 20:28:26,322 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:26,337 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:26,338 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:26,387 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:26,387 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:26,388 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39500#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-11 20:28:26,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-11 20:28:26,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:26,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-11 20:28:26,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:28:26,388 INFO L87 Difference]: Start difference. First operand 93 states and 240 transitions. Second operand 25 states. [2020-09-11 20:28:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:28,193 INFO L93 Difference]: Finished difference Result 111 states and 283 transitions. [2020-09-11 20:28:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-11 20:28:28,194 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-11 20:28:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:28,194 INFO L225 Difference]: With dead ends: 111 [2020-09-11 20:28:28,194 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 20:28:28,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1332, Invalid=2958, Unknown=0, NotChecked=0, Total=4290 [2020-09-11 20:28:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 20:28:28,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-09-11 20:28:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 20:28:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-09-11 20:28:28,197 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 28 [2020-09-11 20:28:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:28,198 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-09-11 20:28:28,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-11 20:28:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-09-11 20:28:28,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-11 20:28:28,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:28,198 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:28,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:28:28,406 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:28,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:28,407 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 110 times [2020-09-11 20:28:28,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:28,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094446764] [2020-09-11 20:28:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:28,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094446764] [2020-09-11 20:28:28,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392909893] [2020-09-11 20:28:28,933 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 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 20:28:29,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:28:29,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:29,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-11 20:28:29,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:29,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:29,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-11 20:28:29,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [709676095] [2020-09-11 20:28:29,023 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:29,025 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:29,034 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2020-09-11 20:28:29,034 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:29,039 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:29,039 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:29,074 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:29,075 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:29,104 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:29,104 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:29,116 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:29,116 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:29,131 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:29,132 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:29,134 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:29,134 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:29,158 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:29,159 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:29,174 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:29,174 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:29,182 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39943#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-11 20:28:29,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-11 20:28:29,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:29,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-11 20:28:29,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-09-11 20:28:29,183 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 26 states. [2020-09-11 20:28:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:30,147 INFO L93 Difference]: Finished difference Result 108 states and 252 transitions. [2020-09-11 20:28:30,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 20:28:30,148 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-11 20:28:30,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:30,149 INFO L225 Difference]: With dead ends: 108 [2020-09-11 20:28:30,149 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 20:28:30,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1664, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 20:28:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 20:28:30,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-09-11 20:28:30,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 20:28:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-09-11 20:28:30,151 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 29 [2020-09-11 20:28:30,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:30,151 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-09-11 20:28:30,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-11 20:28:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-09-11 20:28:30,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-11 20:28:30,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:30,151 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:30,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-11 20:28:30,352 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:30,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:30,353 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 111 times [2020-09-11 20:28:30,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:30,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086227708] [2020-09-11 20:28:30,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:30,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086227708] [2020-09-11 20:28:30,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500824757] [2020-09-11 20:28:30,868 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 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 20:28:30,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-11 20:28:30,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:30,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-11 20:28:30,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:30,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:30,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-11 20:28:30,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1892791921] [2020-09-11 20:28:30,958 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:30,959 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:30,966 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-11 20:28:30,966 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:30,966 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:30,967 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:31,017 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:31,017 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:31,028 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [40363#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-11 20:28:31,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-11 20:28:31,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:31,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-11 20:28:31,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-09-11 20:28:31,030 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 26 states. [2020-09-11 20:28:32,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:32,103 INFO L93 Difference]: Finished difference Result 152 states and 342 transitions. [2020-09-11 20:28:32,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 20:28:32,104 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-11 20:28:32,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:32,105 INFO L225 Difference]: With dead ends: 152 [2020-09-11 20:28:32,105 INFO L226 Difference]: Without dead ends: 146 [2020-09-11 20:28:32,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=749, Invalid=2007, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 20:28:32,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-11 20:28:32,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 80. [2020-09-11 20:28:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 20:28:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 198 transitions. [2020-09-11 20:28:32,108 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 198 transitions. Word has length 29 [2020-09-11 20:28:32,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:32,109 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 198 transitions. [2020-09-11 20:28:32,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-11 20:28:32,109 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 198 transitions. [2020-09-11 20:28:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-11 20:28:32,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:32,109 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:32,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-09-11 20:28:32,310 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:32,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:32,311 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 112 times [2020-09-11 20:28:32,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:32,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141167326] [2020-09-11 20:28:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:32,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141167326] [2020-09-11 20:28:32,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174573841] [2020-09-11 20:28:32,789 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 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 20:28:32,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:28:32,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:32,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-11 20:28:32,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:32,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:32,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-11 20:28:32,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [12257273] [2020-09-11 20:28:32,873 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:32,875 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:32,881 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-11 20:28:32,881 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:32,882 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:32,882 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:32,931 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:32,931 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:32,942 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [40839#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:28:32,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-11 20:28:32,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:32,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-11 20:28:32,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2020-09-11 20:28:32,944 INFO L87 Difference]: Start difference. First operand 80 states and 198 transitions. Second operand 26 states. [2020-09-11 20:28:34,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:34,136 INFO L93 Difference]: Finished difference Result 149 states and 338 transitions. [2020-09-11 20:28:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 20:28:34,137 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-11 20:28:34,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:34,138 INFO L225 Difference]: With dead ends: 149 [2020-09-11 20:28:34,138 INFO L226 Difference]: Without dead ends: 143 [2020-09-11 20:28:34,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=776, Invalid=2194, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 20:28:34,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-11 20:28:34,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 82. [2020-09-11 20:28:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 20:28:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 204 transitions. [2020-09-11 20:28:34,141 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 204 transitions. Word has length 29 [2020-09-11 20:28:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:34,141 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 204 transitions. [2020-09-11 20:28:34,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-11 20:28:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 204 transitions. [2020-09-11 20:28:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-11 20:28:34,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:34,142 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:34,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-11 20:28:34,343 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:34,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 113 times [2020-09-11 20:28:34,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:34,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323432636] [2020-09-11 20:28:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:34,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323432636] [2020-09-11 20:28:34,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344202793] [2020-09-11 20:28:34,812 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 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 20:28:34,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-11 20:28:34,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:34,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-11 20:28:34,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:34,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:34,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-11 20:28:34,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1039689949] [2020-09-11 20:28:34,895 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:34,898 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:34,905 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-11 20:28:34,906 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:34,906 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:34,907 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:34,947 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:34,948 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:34,959 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41320#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:28:34,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-11 20:28:34,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:34,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-11 20:28:34,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2020-09-11 20:28:34,960 INFO L87 Difference]: Start difference. First operand 82 states and 204 transitions. Second operand 26 states. [2020-09-11 20:28:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:36,224 INFO L93 Difference]: Finished difference Result 147 states and 336 transitions. [2020-09-11 20:28:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 20:28:36,225 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-11 20:28:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:36,226 INFO L225 Difference]: With dead ends: 147 [2020-09-11 20:28:36,226 INFO L226 Difference]: Without dead ends: 141 [2020-09-11 20:28:36,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=819, Invalid=2373, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 20:28:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-11 20:28:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 84. [2020-09-11 20:28:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-11 20:28:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 210 transitions. [2020-09-11 20:28:36,228 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 210 transitions. Word has length 29 [2020-09-11 20:28:36,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:36,229 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 210 transitions. [2020-09-11 20:28:36,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-11 20:28:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 210 transitions. [2020-09-11 20:28:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-11 20:28:36,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:36,230 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:36,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-11 20:28:36,437 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:36,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:36,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 114 times [2020-09-11 20:28:36,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:36,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526063022] [2020-09-11 20:28:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:36,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526063022] [2020-09-11 20:28:36,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144173637] [2020-09-11 20:28:36,885 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 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 20:28:36,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-11 20:28:36,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:36,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-11 20:28:36,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:36,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:36,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-11 20:28:36,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1188073131] [2020-09-11 20:28:36,978 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:36,980 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:36,986 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-11 20:28:36,986 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:36,987 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:36,987 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:37,043 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:37,043 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:37,068 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41807#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:28:37,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-11 20:28:37,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:37,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-11 20:28:37,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-09-11 20:28:37,069 INFO L87 Difference]: Start difference. First operand 84 states and 210 transitions. Second operand 26 states. [2020-09-11 20:28:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:38,429 INFO L93 Difference]: Finished difference Result 145 states and 334 transitions. [2020-09-11 20:28:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 20:28:38,430 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-11 20:28:38,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:38,431 INFO L225 Difference]: With dead ends: 145 [2020-09-11 20:28:38,431 INFO L226 Difference]: Without dead ends: 139 [2020-09-11 20:28:38,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2544, Unknown=0, NotChecked=0, Total=3422 [2020-09-11 20:28:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-11 20:28:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 86. [2020-09-11 20:28:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 20:28:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 216 transitions. [2020-09-11 20:28:38,434 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 216 transitions. Word has length 29 [2020-09-11 20:28:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:38,435 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 216 transitions. [2020-09-11 20:28:38,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-11 20:28:38,435 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 216 transitions. [2020-09-11 20:28:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-11 20:28:38,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:38,436 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:38,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-11 20:28:38,645 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 115 times [2020-09-11 20:28:38,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:38,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7983329] [2020-09-11 20:28:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:39,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7983329] [2020-09-11 20:28:39,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657971949] [2020-09-11 20:28:39,095 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 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 20:28:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:39,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-11 20:28:39,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:39,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:39,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-11 20:28:39,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2069651844] [2020-09-11 20:28:39,185 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:39,187 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:39,193 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-11 20:28:39,193 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:39,194 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:39,194 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:39,243 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:39,243 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:39,255 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [42300#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:28:39,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-11 20:28:39,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:39,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-11 20:28:39,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2020-09-11 20:28:39,256 INFO L87 Difference]: Start difference. First operand 86 states and 216 transitions. Second operand 26 states. [2020-09-11 20:28:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:40,748 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-09-11 20:28:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 20:28:40,749 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-11 20:28:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:40,750 INFO L225 Difference]: With dead ends: 143 [2020-09-11 20:28:40,750 INFO L226 Difference]: Without dead ends: 137 [2020-09-11 20:28:40,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=953, Invalid=2707, Unknown=0, NotChecked=0, Total=3660 [2020-09-11 20:28:40,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-11 20:28:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 88. [2020-09-11 20:28:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 20:28:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 222 transitions. [2020-09-11 20:28:40,753 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 222 transitions. Word has length 29 [2020-09-11 20:28:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:40,753 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 222 transitions. [2020-09-11 20:28:40,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-11 20:28:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 222 transitions. [2020-09-11 20:28:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-11 20:28:40,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:40,754 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:40,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:28:40,958 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:40,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:40,959 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 116 times [2020-09-11 20:28:40,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:40,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436183450] [2020-09-11 20:28:40,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:41,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436183450] [2020-09-11 20:28:41,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616824825] [2020-09-11 20:28:41,392 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 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 20:28:41,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:28:41,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:41,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-11 20:28:41,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:41,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:41,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-11 20:28:41,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [780764808] [2020-09-11 20:28:41,488 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:41,490 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:41,498 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-11 20:28:41,498 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:41,499 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:41,499 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:41,549 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:41,550 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:41,563 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [42799#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-11 20:28:41,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-11 20:28:41,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:41,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-11 20:28:41,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-09-11 20:28:41,564 INFO L87 Difference]: Start difference. First operand 88 states and 222 transitions. Second operand 26 states. [2020-09-11 20:28:43,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:43,169 INFO L93 Difference]: Finished difference Result 141 states and 330 transitions. [2020-09-11 20:28:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-11 20:28:43,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-11 20:28:43,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:43,171 INFO L225 Difference]: With dead ends: 141 [2020-09-11 20:28:43,171 INFO L226 Difference]: Without dead ends: 135 [2020-09-11 20:28:43,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1044, Invalid=2862, Unknown=0, NotChecked=0, Total=3906 [2020-09-11 20:28:43,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-11 20:28:43,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 90. [2020-09-11 20:28:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-11 20:28:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 228 transitions. [2020-09-11 20:28:43,175 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 228 transitions. Word has length 29 [2020-09-11 20:28:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:43,175 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 228 transitions. [2020-09-11 20:28:43,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-11 20:28:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 228 transitions. [2020-09-11 20:28:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-11 20:28:43,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:43,176 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:43,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-11 20:28:43,384 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:43,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:43,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 117 times [2020-09-11 20:28:43,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:43,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632161374] [2020-09-11 20:28:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:43,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632161374] [2020-09-11 20:28:43,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94617920] [2020-09-11 20:28:43,813 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 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 20:28:43,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-11 20:28:43,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:43,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-11 20:28:43,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:43,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:43,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-11 20:28:43,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [544455496] [2020-09-11 20:28:43,924 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:43,926 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:43,933 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-11 20:28:43,933 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:43,934 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:43,934 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:43,982 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:43,982 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:43,993 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43304#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-11 20:28:43,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-11 20:28:43,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:43,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-11 20:28:43,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2020-09-11 20:28:43,995 INFO L87 Difference]: Start difference. First operand 90 states and 228 transitions. Second operand 26 states. [2020-09-11 20:28:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:45,687 INFO L93 Difference]: Finished difference Result 139 states and 328 transitions. [2020-09-11 20:28:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-11 20:28:45,689 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-11 20:28:45,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:45,689 INFO L225 Difference]: With dead ends: 139 [2020-09-11 20:28:45,689 INFO L226 Difference]: Without dead ends: 133 [2020-09-11 20:28:45,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1151, Invalid=3009, Unknown=0, NotChecked=0, Total=4160 [2020-09-11 20:28:45,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-11 20:28:45,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 92. [2020-09-11 20:28:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-11 20:28:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 234 transitions. [2020-09-11 20:28:45,692 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 234 transitions. Word has length 29 [2020-09-11 20:28:45,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:45,693 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 234 transitions. [2020-09-11 20:28:45,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-11 20:28:45,693 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 234 transitions. [2020-09-11 20:28:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-11 20:28:45,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:45,693 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:45,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:28:45,894 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:45,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:45,895 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 118 times [2020-09-11 20:28:45,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:45,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896269482] [2020-09-11 20:28:45,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:46,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896269482] [2020-09-11 20:28:46,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956309326] [2020-09-11 20:28:46,307 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 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 20:28:46,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:28:46,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:46,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-11 20:28:46,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:46,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:46,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-11 20:28:46,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [460902174] [2020-09-11 20:28:46,403 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:46,405 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:46,411 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-11 20:28:46,411 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:46,412 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:46,412 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:46,461 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:46,462 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:46,474 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43815#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-11 20:28:46,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-11 20:28:46,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:46,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-11 20:28:46,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-09-11 20:28:46,475 INFO L87 Difference]: Start difference. First operand 92 states and 234 transitions. Second operand 26 states. [2020-09-11 20:28:48,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:48,304 INFO L93 Difference]: Finished difference Result 137 states and 326 transitions. [2020-09-11 20:28:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-11 20:28:48,305 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-11 20:28:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:48,306 INFO L225 Difference]: With dead ends: 137 [2020-09-11 20:28:48,306 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 20:28:48,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1274, Invalid=3148, Unknown=0, NotChecked=0, Total=4422 [2020-09-11 20:28:48,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 20:28:48,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2020-09-11 20:28:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-11 20:28:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 240 transitions. [2020-09-11 20:28:48,309 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 240 transitions. Word has length 29 [2020-09-11 20:28:48,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:48,309 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 240 transitions. [2020-09-11 20:28:48,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-11 20:28:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 240 transitions. [2020-09-11 20:28:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-11 20:28:48,309 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:48,309 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:48,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:28:48,510 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:48,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:48,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 119 times [2020-09-11 20:28:48,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:48,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504717641] [2020-09-11 20:28:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:48,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504717641] [2020-09-11 20:28:48,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797620263] [2020-09-11 20:28:48,935 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 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 20:28:49,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-11 20:28:49,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:49,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-11 20:28:49,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:49,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:49,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-11 20:28:49,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1021027937] [2020-09-11 20:28:49,039 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:49,040 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:49,047 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-11 20:28:49,048 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:49,048 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:49,048 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:49,095 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:49,095 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:49,106 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44332#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-11 20:28:49,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-11 20:28:49,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:49,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-11 20:28:49,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2020-09-11 20:28:49,107 INFO L87 Difference]: Start difference. First operand 94 states and 240 transitions. Second operand 26 states. [2020-09-11 20:28:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:51,009 INFO L93 Difference]: Finished difference Result 137 states and 329 transitions. [2020-09-11 20:28:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-11 20:28:51,009 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-11 20:28:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:51,010 INFO L225 Difference]: With dead ends: 137 [2020-09-11 20:28:51,010 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 20:28:51,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1413, Invalid=3279, Unknown=0, NotChecked=0, Total=4692 [2020-09-11 20:28:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 20:28:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2020-09-11 20:28:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-11 20:28:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 248 transitions. [2020-09-11 20:28:51,012 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 248 transitions. Word has length 29 [2020-09-11 20:28:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:51,012 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 248 transitions. [2020-09-11 20:28:51,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-11 20:28:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 248 transitions. [2020-09-11 20:28:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-11 20:28:51,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:51,013 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:51,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2020-09-11 20:28:51,214 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:51,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 120 times [2020-09-11 20:28:51,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:51,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769732286] [2020-09-11 20:28:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:51,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769732286] [2020-09-11 20:28:51,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375361640] [2020-09-11 20:28:51,633 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 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 20:28:51,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-11 20:28:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:51,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-11 20:28:51,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:51,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:51,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-11 20:28:51,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [156478515] [2020-09-11 20:28:51,737 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:51,739 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:51,746 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-11 20:28:51,746 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:51,746 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:51,747 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:51,791 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:51,792 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:51,813 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44857#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-11 20:28:51,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-11 20:28:51,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:51,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-11 20:28:51,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2020-09-11 20:28:51,814 INFO L87 Difference]: Start difference. First operand 96 states and 248 transitions. Second operand 26 states. [2020-09-11 20:28:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:53,789 INFO L93 Difference]: Finished difference Result 138 states and 339 transitions. [2020-09-11 20:28:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-11 20:28:53,791 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-11 20:28:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:53,791 INFO L225 Difference]: With dead ends: 138 [2020-09-11 20:28:53,791 INFO L226 Difference]: Without dead ends: 126 [2020-09-11 20:28:53,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1566, Invalid=3404, Unknown=0, NotChecked=0, Total=4970 [2020-09-11 20:28:53,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-11 20:28:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 74. [2020-09-11 20:28:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 20:28:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-11 20:28:53,795 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 29 [2020-09-11 20:28:53,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:53,795 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-11 20:28:53,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-11 20:28:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-11 20:28:53,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-11 20:28:53,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:53,795 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:53,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:28:53,996 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:53,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:53,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 121 times [2020-09-11 20:28:53,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:53,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074548078] [2020-09-11 20:28:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:54,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074548078] [2020-09-11 20:28:54,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543754499] [2020-09-11 20:28:54,563 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 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 20:28:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:54,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-11 20:28:54,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:54,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:54,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-11 20:28:54,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [435316916] [2020-09-11 20:28:54,647 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:54,650 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:54,660 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 46 transitions. [2020-09-11 20:28:54,661 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:54,662 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:54,662 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:54,727 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:54,728 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:54,746 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45347#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:28:54,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-11 20:28:54,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-11 20:28:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-09-11 20:28:54,747 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 27 states. [2020-09-11 20:28:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:55,753 INFO L93 Difference]: Finished difference Result 134 states and 306 transitions. [2020-09-11 20:28:55,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 20:28:55,754 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-11 20:28:55,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:55,754 INFO L225 Difference]: With dead ends: 134 [2020-09-11 20:28:55,754 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 20:28:55,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=747, Invalid=1905, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 20:28:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 20:28:55,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 81. [2020-09-11 20:28:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 20:28:55,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 200 transitions. [2020-09-11 20:28:55,761 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 200 transitions. Word has length 30 [2020-09-11 20:28:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:55,764 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 200 transitions. [2020-09-11 20:28:55,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-11 20:28:55,764 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 200 transitions. [2020-09-11 20:28:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-11 20:28:55,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:55,765 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:55,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:28:55,973 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:55,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 122 times [2020-09-11 20:28:55,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:55,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891197207] [2020-09-11 20:28:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:56,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891197207] [2020-09-11 20:28:56,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688807088] [2020-09-11 20:28:56,523 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 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 20:28:56,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:28:56,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:56,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-11 20:28:56,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:56,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:56,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-11 20:28:56,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [657475731] [2020-09-11 20:28:56,615 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:56,616 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:56,623 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-11 20:28:56,623 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:56,623 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:56,624 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:56,696 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:56,696 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:56,709 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45807#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:28:56,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-11 20:28:56,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:56,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-11 20:28:56,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-09-11 20:28:56,710 INFO L87 Difference]: Start difference. First operand 81 states and 200 transitions. Second operand 27 states. [2020-09-11 20:28:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:28:57,845 INFO L93 Difference]: Finished difference Result 131 states and 302 transitions. [2020-09-11 20:28:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 20:28:57,846 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-11 20:28:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:28:57,847 INFO L225 Difference]: With dead ends: 131 [2020-09-11 20:28:57,847 INFO L226 Difference]: Without dead ends: 125 [2020-09-11 20:28:57,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=759, Invalid=2103, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 20:28:57,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-11 20:28:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2020-09-11 20:28:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 20:28:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 206 transitions. [2020-09-11 20:28:57,850 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 206 transitions. Word has length 30 [2020-09-11 20:28:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:28:57,851 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 206 transitions. [2020-09-11 20:28:57,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-11 20:28:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 206 transitions. [2020-09-11 20:28:57,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-11 20:28:57,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:28:57,851 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:28:58,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-11 20:28:58,052 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:28:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:28:58,053 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 123 times [2020-09-11 20:28:58,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:28:58,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074141342] [2020-09-11 20:28:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:28:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:28:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:58,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074141342] [2020-09-11 20:28:58,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899561209] [2020-09-11 20:28:58,583 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 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 20:28:58,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-11 20:28:58,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:28:58,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-11 20:28:58,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:28:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:28:58,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:28:58,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-11 20:28:58,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [231689416] [2020-09-11 20:28:58,674 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:28:58,676 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:28:58,685 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-11 20:28:58,685 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:28:58,710 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:58,710 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:58,761 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:28:58,762 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:28:58,763 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [46272#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:28:58,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-11 20:28:58,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:28:58,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-11 20:28:58,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-09-11 20:28:58,764 INFO L87 Difference]: Start difference. First operand 83 states and 206 transitions. Second operand 27 states. [2020-09-11 20:29:00,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:00,028 INFO L93 Difference]: Finished difference Result 129 states and 300 transitions. [2020-09-11 20:29:00,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 20:29:00,029 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-11 20:29:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:00,029 INFO L225 Difference]: With dead ends: 129 [2020-09-11 20:29:00,030 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 20:29:00,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=787, Invalid=2293, Unknown=0, NotChecked=0, Total=3080 [2020-09-11 20:29:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 20:29:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 85. [2020-09-11 20:29:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-11 20:29:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 212 transitions. [2020-09-11 20:29:00,032 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 212 transitions. Word has length 30 [2020-09-11 20:29:00,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:00,032 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 212 transitions. [2020-09-11 20:29:00,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-11 20:29:00,033 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 212 transitions. [2020-09-11 20:29:00,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-11 20:29:00,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:00,033 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:00,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:29:00,234 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:00,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:00,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 124 times [2020-09-11 20:29:00,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:00,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382805521] [2020-09-11 20:29:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:00,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382805521] [2020-09-11 20:29:00,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387434713] [2020-09-11 20:29:00,739 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 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 20:29:00,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:29:00,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:29:00,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-11 20:29:00,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:00,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:00,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-11 20:29:00,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1937257288] [2020-09-11 20:29:00,829 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:00,831 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:00,838 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-11 20:29:00,838 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:00,853 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:00,853 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:00,908 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:00,909 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:00,910 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [46743#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:29:00,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-11 20:29:00,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:00,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-11 20:29:00,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-09-11 20:29:00,910 INFO L87 Difference]: Start difference. First operand 85 states and 212 transitions. Second operand 27 states. [2020-09-11 20:29:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:02,306 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-11 20:29:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 20:29:02,307 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-11 20:29:02,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:02,307 INFO L225 Difference]: With dead ends: 127 [2020-09-11 20:29:02,307 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 20:29:02,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=831, Invalid=2475, Unknown=0, NotChecked=0, Total=3306 [2020-09-11 20:29:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 20:29:02,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 87. [2020-09-11 20:29:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 20:29:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 218 transitions. [2020-09-11 20:29:02,310 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 218 transitions. Word has length 30 [2020-09-11 20:29:02,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:02,310 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 218 transitions. [2020-09-11 20:29:02,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-11 20:29:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 218 transitions. [2020-09-11 20:29:02,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-11 20:29:02,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:02,311 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:02,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-11 20:29:02,512 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:02,513 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 125 times [2020-09-11 20:29:02,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:02,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004925084] [2020-09-11 20:29:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:03,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004925084] [2020-09-11 20:29:03,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885448192] [2020-09-11 20:29:03,004 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 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 20:29:03,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-11 20:29:03,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:29:03,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-11 20:29:03,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:03,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:03,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-11 20:29:03,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1900963924] [2020-09-11 20:29:03,099 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:03,101 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:03,108 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-11 20:29:03,108 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:03,109 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:03,109 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:03,162 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:03,162 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:03,176 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [47220#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-11 20:29:03,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-11 20:29:03,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:03,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-11 20:29:03,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-09-11 20:29:03,177 INFO L87 Difference]: Start difference. First operand 87 states and 218 transitions. Second operand 27 states. [2020-09-11 20:29:04,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:04,646 INFO L93 Difference]: Finished difference Result 125 states and 296 transitions. [2020-09-11 20:29:04,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 20:29:04,647 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-11 20:29:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:04,648 INFO L225 Difference]: With dead ends: 125 [2020-09-11 20:29:04,648 INFO L226 Difference]: Without dead ends: 119 [2020-09-11 20:29:04,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=891, Invalid=2649, Unknown=0, NotChecked=0, Total=3540 [2020-09-11 20:29:04,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-11 20:29:04,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 89. [2020-09-11 20:29:04,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-11 20:29:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 224 transitions. [2020-09-11 20:29:04,650 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 224 transitions. Word has length 30 [2020-09-11 20:29:04,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:04,650 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 224 transitions. [2020-09-11 20:29:04,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-11 20:29:04,650 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 224 transitions. [2020-09-11 20:29:04,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-11 20:29:04,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:04,651 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:04,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:29:04,854 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:04,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 126 times [2020-09-11 20:29:04,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:04,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550086897] [2020-09-11 20:29:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:05,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550086897] [2020-09-11 20:29:05,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758152879] [2020-09-11 20:29:05,330 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 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 20:29:05,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-11 20:29:05,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:29:05,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-11 20:29:05,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:05,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:05,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-11 20:29:05,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [347286630] [2020-09-11 20:29:05,452 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:05,454 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:05,461 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-11 20:29:05,461 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:05,462 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:05,462 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:05,521 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:05,522 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:05,535 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [47703#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-11 20:29:05,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-11 20:29:05,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:05,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-11 20:29:05,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-09-11 20:29:05,536 INFO L87 Difference]: Start difference. First operand 89 states and 224 transitions. Second operand 27 states. [2020-09-11 20:29:07,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:07,178 INFO L93 Difference]: Finished difference Result 123 states and 294 transitions. [2020-09-11 20:29:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 20:29:07,179 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-11 20:29:07,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:07,179 INFO L225 Difference]: With dead ends: 123 [2020-09-11 20:29:07,179 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 20:29:07,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=967, Invalid=2815, Unknown=0, NotChecked=0, Total=3782 [2020-09-11 20:29:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 20:29:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-11 20:29:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-11 20:29:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 230 transitions. [2020-09-11 20:29:07,183 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 230 transitions. Word has length 30 [2020-09-11 20:29:07,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:07,183 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 230 transitions. [2020-09-11 20:29:07,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-11 20:29:07,183 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 230 transitions. [2020-09-11 20:29:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-11 20:29:07,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:07,184 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:07,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-11 20:29:07,387 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:07,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 127 times [2020-09-11 20:29:07,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:07,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347897103] [2020-09-11 20:29:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:07,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347897103] [2020-09-11 20:29:07,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130753027] [2020-09-11 20:29:07,831 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 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 20:29:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:07,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-11 20:29:07,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:07,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:07,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-11 20:29:07,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1802137747] [2020-09-11 20:29:07,929 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:07,931 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:07,938 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-11 20:29:07,938 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:07,939 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:07,939 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:07,994 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:07,994 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:08,009 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48192#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-11 20:29:08,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-11 20:29:08,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:08,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-11 20:29:08,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-09-11 20:29:08,010 INFO L87 Difference]: Start difference. First operand 91 states and 230 transitions. Second operand 27 states. [2020-09-11 20:29:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:09,756 INFO L93 Difference]: Finished difference Result 121 states and 292 transitions. [2020-09-11 20:29:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-11 20:29:09,758 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-11 20:29:09,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:09,758 INFO L225 Difference]: With dead ends: 121 [2020-09-11 20:29:09,758 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 20:29:09,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2020-09-11 20:29:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 20:29:09,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2020-09-11 20:29:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-11 20:29:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 236 transitions. [2020-09-11 20:29:09,762 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 236 transitions. Word has length 30 [2020-09-11 20:29:09,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:09,762 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 236 transitions. [2020-09-11 20:29:09,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-11 20:29:09,762 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 236 transitions. [2020-09-11 20:29:09,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-11 20:29:09,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:09,763 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:09,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:29:09,963 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:09,964 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 128 times [2020-09-11 20:29:09,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:09,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159981484] [2020-09-11 20:29:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:10,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159981484] [2020-09-11 20:29:10,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436290463] [2020-09-11 20:29:10,412 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 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 20:29:10,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:29:10,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:29:10,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-11 20:29:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:10,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:10,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-11 20:29:10,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1711974303] [2020-09-11 20:29:10,509 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:10,523 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:10,530 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-11 20:29:10,530 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:10,531 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:10,531 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:10,593 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:10,593 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:10,609 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48687#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-11 20:29:10,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-11 20:29:10,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:10,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-11 20:29:10,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-09-11 20:29:10,610 INFO L87 Difference]: Start difference. First operand 93 states and 236 transitions. Second operand 27 states. [2020-09-11 20:29:12,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:12,466 INFO L93 Difference]: Finished difference Result 119 states and 290 transitions. [2020-09-11 20:29:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-11 20:29:12,467 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-11 20:29:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:12,468 INFO L225 Difference]: With dead ends: 119 [2020-09-11 20:29:12,468 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 20:29:12,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1167, Invalid=3123, Unknown=0, NotChecked=0, Total=4290 [2020-09-11 20:29:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 20:29:12,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2020-09-11 20:29:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-11 20:29:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 242 transitions. [2020-09-11 20:29:12,471 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 242 transitions. Word has length 30 [2020-09-11 20:29:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:12,471 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 242 transitions. [2020-09-11 20:29:12,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-11 20:29:12,471 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 242 transitions. [2020-09-11 20:29:12,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-11 20:29:12,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:12,472 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:12,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-11 20:29:12,673 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:12,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 129 times [2020-09-11 20:29:12,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:12,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322405335] [2020-09-11 20:29:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:13,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322405335] [2020-09-11 20:29:13,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054682658] [2020-09-11 20:29:13,098 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 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 20:29:13,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-11 20:29:13,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:29:13,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-11 20:29:13,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:13,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:13,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-11 20:29:13,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1210958047] [2020-09-11 20:29:13,205 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:13,207 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:13,214 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-11 20:29:13,214 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:13,234 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:13,235 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:13,285 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:13,285 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:13,286 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49188#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-11 20:29:13,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-11 20:29:13,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:13,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-11 20:29:13,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-09-11 20:29:13,287 INFO L87 Difference]: Start difference. First operand 95 states and 242 transitions. Second operand 27 states. [2020-09-11 20:29:15,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:15,299 INFO L93 Difference]: Finished difference Result 117 states and 288 transitions. [2020-09-11 20:29:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-11 20:29:15,300 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-11 20:29:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:15,301 INFO L225 Difference]: With dead ends: 117 [2020-09-11 20:29:15,301 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 20:29:15,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1291, Invalid=3265, Unknown=0, NotChecked=0, Total=4556 [2020-09-11 20:29:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 20:29:15,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2020-09-11 20:29:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-11 20:29:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 248 transitions. [2020-09-11 20:29:15,304 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 248 transitions. Word has length 30 [2020-09-11 20:29:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:15,305 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 248 transitions. [2020-09-11 20:29:15,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-11 20:29:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 248 transitions. [2020-09-11 20:29:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-11 20:29:15,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:15,305 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:15,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:29:15,515 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:15,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:15,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 130 times [2020-09-11 20:29:15,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:15,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501409452] [2020-09-11 20:29:15,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:15,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501409452] [2020-09-11 20:29:15,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641917653] [2020-09-11 20:29:15,973 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 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 20:29:16,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:29:16,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:29:16,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-11 20:29:16,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:16,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:16,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-11 20:29:16,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [45089012] [2020-09-11 20:29:16,073 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:16,075 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:16,082 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-11 20:29:16,082 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:16,083 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:16,083 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:16,140 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:16,140 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:16,155 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49695#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-11 20:29:16,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-11 20:29:16,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:16,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-11 20:29:16,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-09-11 20:29:16,157 INFO L87 Difference]: Start difference. First operand 97 states and 248 transitions. Second operand 27 states. [2020-09-11 20:29:18,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:18,279 INFO L93 Difference]: Finished difference Result 117 states and 291 transitions. [2020-09-11 20:29:18,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-11 20:29:18,280 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-11 20:29:18,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:18,280 INFO L225 Difference]: With dead ends: 117 [2020-09-11 20:29:18,280 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 20:29:18,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1431, Invalid=3399, Unknown=0, NotChecked=0, Total=4830 [2020-09-11 20:29:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 20:29:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-09-11 20:29:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 20:29:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 256 transitions. [2020-09-11 20:29:18,283 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 256 transitions. Word has length 30 [2020-09-11 20:29:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:18,283 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 256 transitions. [2020-09-11 20:29:18,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-11 20:29:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 256 transitions. [2020-09-11 20:29:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-11 20:29:18,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:18,284 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:18,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:29:18,485 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:18,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 131 times [2020-09-11 20:29:18,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:18,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911815451] [2020-09-11 20:29:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:18,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911815451] [2020-09-11 20:29:18,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024448189] [2020-09-11 20:29:18,940 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 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 20:29:19,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-11 20:29:19,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:29:19,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-11 20:29:19,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:19,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:19,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-11 20:29:19,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1078658330] [2020-09-11 20:29:19,042 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:19,044 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:19,051 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-11 20:29:19,052 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:19,066 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:19,067 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:19,122 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:19,122 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:19,123 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [50210#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-11 20:29:19,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-11 20:29:19,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:19,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-11 20:29:19,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-09-11 20:29:19,124 INFO L87 Difference]: Start difference. First operand 99 states and 256 transitions. Second operand 27 states. [2020-09-11 20:29:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:21,322 INFO L93 Difference]: Finished difference Result 117 states and 299 transitions. [2020-09-11 20:29:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-11 20:29:21,323 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-11 20:29:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:21,323 INFO L225 Difference]: With dead ends: 117 [2020-09-11 20:29:21,323 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 20:29:21,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1585, Invalid=3527, Unknown=0, NotChecked=0, Total=5112 [2020-09-11 20:29:21,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 20:29:21,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-11 20:29:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 20:29:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-09-11 20:29:21,326 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 30 [2020-09-11 20:29:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:21,326 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-09-11 20:29:21,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-11 20:29:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-09-11 20:29:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-11 20:29:21,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:21,327 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:21,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:29:21,534 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 132 times [2020-09-11 20:29:21,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:21,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022424198] [2020-09-11 20:29:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:22,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022424198] [2020-09-11 20:29:22,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839165255] [2020-09-11 20:29:22,154 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 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 20:29:22,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-11 20:29:22,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:29:22,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-11 20:29:22,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:22,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:22,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-11 20:29:22,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [289001406] [2020-09-11 20:29:22,244 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:22,246 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:22,254 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 51 transitions. [2020-09-11 20:29:22,254 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:22,254 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:22,255 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:22,301 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:22,302 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:22,333 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:22,334 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:22,346 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:22,346 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:22,363 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:22,363 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:22,368 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:22,368 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:22,402 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:22,402 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:22,412 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:22,412 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:22,429 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [50683#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-11 20:29:22,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-11 20:29:22,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:22,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-11 20:29:22,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-09-11 20:29:22,430 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 28 states. [2020-09-11 20:29:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:23,581 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2020-09-11 20:29:23,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 20:29:23,584 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-11 20:29:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:23,585 INFO L225 Difference]: With dead ends: 114 [2020-09-11 20:29:23,585 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 20:29:23,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=809, Invalid=1947, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 20:29:23,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 20:29:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-09-11 20:29:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 20:29:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2020-09-11 20:29:23,588 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 31 [2020-09-11 20:29:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:23,588 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2020-09-11 20:29:23,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-11 20:29:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2020-09-11 20:29:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-11 20:29:23,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:23,588 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:23,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-11 20:29:23,791 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:23,792 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 133 times [2020-09-11 20:29:23,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:23,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960150246] [2020-09-11 20:29:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:24,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960150246] [2020-09-11 20:29:24,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123353184] [2020-09-11 20:29:24,400 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 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 20:29:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:24,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-11 20:29:24,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:24,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:24,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-11 20:29:24,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [764374533] [2020-09-11 20:29:24,491 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:24,493 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:24,501 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-11 20:29:24,501 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:24,514 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:24,514 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:24,567 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:24,567 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:24,568 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [51129#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-11 20:29:24,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-11 20:29:24,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:24,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-11 20:29:24,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2020-09-11 20:29:24,569 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand 28 states. [2020-09-11 20:29:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:25,819 INFO L93 Difference]: Finished difference Result 162 states and 364 transitions. [2020-09-11 20:29:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 20:29:25,820 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-11 20:29:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:25,821 INFO L225 Difference]: With dead ends: 162 [2020-09-11 20:29:25,821 INFO L226 Difference]: Without dead ends: 156 [2020-09-11 20:29:25,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=872, Invalid=2320, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 20:29:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-11 20:29:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 84. [2020-09-11 20:29:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-11 20:29:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 208 transitions. [2020-09-11 20:29:25,824 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 208 transitions. Word has length 31 [2020-09-11 20:29:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:25,825 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 208 transitions. [2020-09-11 20:29:25,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-11 20:29:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 208 transitions. [2020-09-11 20:29:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-11 20:29:25,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:25,825 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:26,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-11 20:29:26,026 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:26,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:26,027 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 134 times [2020-09-11 20:29:26,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:26,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225360418] [2020-09-11 20:29:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:26,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225360418] [2020-09-11 20:29:26,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233927290] [2020-09-11 20:29:26,608 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 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 20:29:26,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:29:26,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:29:26,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-11 20:29:26,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:26,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:26,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-11 20:29:26,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1091646203] [2020-09-11 20:29:26,699 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:26,700 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:26,722 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-11 20:29:26,722 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:26,723 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:26,723 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:26,775 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:26,775 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:26,786 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [51635#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-11 20:29:26,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-11 20:29:26,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:26,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-11 20:29:26,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2020-09-11 20:29:26,788 INFO L87 Difference]: Start difference. First operand 84 states and 208 transitions. Second operand 28 states. [2020-09-11 20:29:28,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:28,143 INFO L93 Difference]: Finished difference Result 159 states and 360 transitions. [2020-09-11 20:29:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 20:29:28,144 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-11 20:29:28,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:28,144 INFO L225 Difference]: With dead ends: 159 [2020-09-11 20:29:28,145 INFO L226 Difference]: Without dead ends: 153 [2020-09-11 20:29:28,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=897, Invalid=2525, Unknown=0, NotChecked=0, Total=3422 [2020-09-11 20:29:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-11 20:29:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 86. [2020-09-11 20:29:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 20:29:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 214 transitions. [2020-09-11 20:29:28,147 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 214 transitions. Word has length 31 [2020-09-11 20:29:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:28,147 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 214 transitions. [2020-09-11 20:29:28,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-11 20:29:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 214 transitions. [2020-09-11 20:29:28,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-11 20:29:28,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:28,148 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:28,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-11 20:29:28,349 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:28,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 135 times [2020-09-11 20:29:28,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:28,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943971797] [2020-09-11 20:29:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:28,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943971797] [2020-09-11 20:29:28,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862205153] [2020-09-11 20:29:28,901 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 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 20:29:28,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-11 20:29:28,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:29:28,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-11 20:29:28,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:28,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:28,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-11 20:29:28,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1604406981] [2020-09-11 20:29:28,999 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:29,001 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:29,008 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-11 20:29:29,008 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:29,009 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:29,009 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:29,063 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:29,063 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:29,076 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [52146#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-11 20:29:29,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-11 20:29:29,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:29,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-11 20:29:29,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2020-09-11 20:29:29,077 INFO L87 Difference]: Start difference. First operand 86 states and 214 transitions. Second operand 28 states. [2020-09-11 20:29:30,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:30,551 INFO L93 Difference]: Finished difference Result 157 states and 358 transitions. [2020-09-11 20:29:30,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 20:29:30,551 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-11 20:29:30,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:30,552 INFO L225 Difference]: With dead ends: 157 [2020-09-11 20:29:30,552 INFO L226 Difference]: Without dead ends: 151 [2020-09-11 20:29:30,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=938, Invalid=2722, Unknown=0, NotChecked=0, Total=3660 [2020-09-11 20:29:30,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-11 20:29:30,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 88. [2020-09-11 20:29:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 20:29:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 220 transitions. [2020-09-11 20:29:30,555 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 220 transitions. Word has length 31 [2020-09-11 20:29:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:30,555 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 220 transitions. [2020-09-11 20:29:30,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-11 20:29:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 220 transitions. [2020-09-11 20:29:30,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-11 20:29:30,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:30,556 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:30,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-11 20:29:30,760 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:30,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 136 times [2020-09-11 20:29:30,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:30,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536440942] [2020-09-11 20:29:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:31,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536440942] [2020-09-11 20:29:31,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346035742] [2020-09-11 20:29:31,313 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 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 20:29:31,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:29:31,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:29:31,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-11 20:29:31,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:31,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:31,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-11 20:29:31,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1354520178] [2020-09-11 20:29:31,404 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:31,406 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:31,413 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-11 20:29:31,414 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:31,414 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:31,414 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:31,466 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:31,467 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:31,477 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [52663#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-11 20:29:31,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-11 20:29:31,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:31,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-11 20:29:31,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-11 20:29:31,479 INFO L87 Difference]: Start difference. First operand 88 states and 220 transitions. Second operand 28 states. [2020-09-11 20:29:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:33,066 INFO L93 Difference]: Finished difference Result 155 states and 356 transitions. [2020-09-11 20:29:33,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 20:29:33,067 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-11 20:29:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:33,068 INFO L225 Difference]: With dead ends: 155 [2020-09-11 20:29:33,068 INFO L226 Difference]: Without dead ends: 149 [2020-09-11 20:29:33,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=995, Invalid=2911, Unknown=0, NotChecked=0, Total=3906 [2020-09-11 20:29:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-11 20:29:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 90. [2020-09-11 20:29:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-11 20:29:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 226 transitions. [2020-09-11 20:29:33,070 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 226 transitions. Word has length 31 [2020-09-11 20:29:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:33,070 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 226 transitions. [2020-09-11 20:29:33,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-11 20:29:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 226 transitions. [2020-09-11 20:29:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-11 20:29:33,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:33,071 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:33,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-11 20:29:33,271 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:33,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:33,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 137 times [2020-09-11 20:29:33,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:33,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086086564] [2020-09-11 20:29:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:33,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086086564] [2020-09-11 20:29:33,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884717236] [2020-09-11 20:29:33,808 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 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 20:29:33,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-11 20:29:33,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:29:33,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-11 20:29:33,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:33,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:33,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-11 20:29:33,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [893717769] [2020-09-11 20:29:33,908 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:33,910 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:33,917 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-11 20:29:33,917 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:33,918 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:33,918 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:33,970 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:33,970 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:33,983 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [53186#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-11 20:29:33,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-11 20:29:33,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:33,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-11 20:29:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-09-11 20:29:33,984 INFO L87 Difference]: Start difference. First operand 90 states and 226 transitions. Second operand 28 states. [2020-09-11 20:29:35,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:29:35,688 INFO L93 Difference]: Finished difference Result 153 states and 354 transitions. [2020-09-11 20:29:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-11 20:29:35,689 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-11 20:29:35,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:29:35,689 INFO L225 Difference]: With dead ends: 153 [2020-09-11 20:29:35,689 INFO L226 Difference]: Without dead ends: 147 [2020-09-11 20:29:35,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1068, Invalid=3092, Unknown=0, NotChecked=0, Total=4160 [2020-09-11 20:29:35,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-11 20:29:35,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 92. [2020-09-11 20:29:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-11 20:29:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 232 transitions. [2020-09-11 20:29:35,692 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 232 transitions. Word has length 31 [2020-09-11 20:29:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:29:35,692 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 232 transitions. [2020-09-11 20:29:35,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-11 20:29:35,692 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 232 transitions. [2020-09-11 20:29:35,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-11 20:29:35,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:29:35,693 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:29:35,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:29:35,895 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:29:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:29:35,895 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 138 times [2020-09-11 20:29:35,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:29:35,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851496651] [2020-09-11 20:29:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:29:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:29:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:36,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851496651] [2020-09-11 20:29:36,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298106259] [2020-09-11 20:29:36,416 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 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 20:29:36,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-11 20:29:36,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:29:36,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-11 20:29:36,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:29:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:29:36,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:29:36,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-11 20:29:36,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1803242915] [2020-09-11 20:29:36,532 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:29:36,536 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:29:36,566 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-11 20:29:36,566 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:29:36,567 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:36,567 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:36,618 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:29:36,619 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:29:36,630 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [53715#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-11 20:29:36,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-11 20:29:36,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:29:36,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-11 20:29:36,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2020-09-11 20:29:36,632 INFO L87 Difference]: Start difference. First operand 92 states and 232 transitions. Second operand 28 states. Received shutdown request... [2020-09-11 20:29:38,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-11 20:29:38,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-11 20:29:38,469 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 20:29:38,475 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 20:29:38,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 08:29:38 BasicIcfg [2020-09-11 20:29:38,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 20:29:38,478 INFO L168 Benchmark]: Toolchain (without parser) took 231851.97 ms. Allocated memory was 137.9 MB in the beginning and 304.6 MB in the end (delta: 166.7 MB). Free memory was 100.0 MB in the beginning and 230.8 MB in the end (delta: -130.8 MB). Peak memory consumption was 215.2 MB. Max. memory is 7.1 GB. [2020-09-11 20:29:38,479 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-09-11 20:29:38,479 INFO L168 Benchmark]: CACSL2BoogieTranslator took 848.43 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 99.4 MB in the beginning and 162.6 MB in the end (delta: -63.2 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-09-11 20:29:38,480 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.18 ms. Allocated memory is still 202.4 MB. Free memory was 161.9 MB in the beginning and 160.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-11 20:29:38,480 INFO L168 Benchmark]: Boogie Preprocessor took 36.05 ms. Allocated memory is still 202.4 MB. Free memory was 160.5 MB in the beginning and 158.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-09-11 20:29:38,480 INFO L168 Benchmark]: RCFGBuilder took 556.10 ms. Allocated memory is still 202.4 MB. Free memory was 158.4 MB in the beginning and 138.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-09-11 20:29:38,481 INFO L168 Benchmark]: TraceAbstraction took 230331.18 ms. Allocated memory was 202.4 MB in the beginning and 304.6 MB in the end (delta: 102.2 MB). Free memory was 137.8 MB in the beginning and 230.8 MB in the end (delta: -93.0 MB). Peak memory consumption was 188.5 MB. Max. memory is 7.1 GB. [2020-09-11 20:29:38,483 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 848.43 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 99.4 MB in the beginning and 162.6 MB in the end (delta: -63.2 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 67.18 ms. Allocated memory is still 202.4 MB. Free memory was 161.9 MB in the beginning and 160.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.05 ms. Allocated memory is still 202.4 MB. Free memory was 160.5 MB in the beginning and 158.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 556.10 ms. Allocated memory is still 202.4 MB. Free memory was 158.4 MB in the beginning and 138.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 230331.18 ms. Allocated memory was 202.4 MB in the beginning and 304.6 MB in the end (delta: 102.2 MB). Free memory was 137.8 MB in the beginning and 230.8 MB in the end (delta: -93.0 MB). Peak memory consumption was 188.5 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 constructing difference of abstraction (92states) and FLOYD_HOARE automaton (currently 38 states, 28 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 63 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 230.1s, OverallIterations: 140, TraceHistogramMax: 12, AutomataDifference: 134.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 1981 SDtfs, 8712 SDslu, 16277 SDs, 0 SdLazy, 18138 SolverSat, 12341 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10866 GetRequests, 4623 SyntacticMatches, 203 SemanticMatches, 6039 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72826 ImplicationChecksByTransitivity, 140.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=132, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 139 MinimizatonAttempts, 4064 StatesRemovedByMinimization, 138 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 4.7s SatisfiabilityAnalysisTime, 42.8s InterpolantComputationTime, 6448 NumberOfCodeBlocks, 6448 NumberOfCodeBlocksAsserted, 807 NumberOfCheckSat, 6171 ConstructedInterpolants, 0 QuantifiedInterpolants, 683311 SizeOfPredicates, 2116 NumberOfNonLiveVariables, 19348 ConjunctsInSsa, 2664 ConjunctsInUnsatCore, 277 InterpolantComputations, 3 PerfectInterpolantSequences, 0/16214 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