/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-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 12:30:35,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 12:30:35,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 12:30:35,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 12:30:35,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 12:30:35,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 12:30:35,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 12:30:36,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 12:30:36,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 12:30:36,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 12:30:36,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 12:30:36,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 12:30:36,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 12:30:36,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 12:30:36,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 12:30:36,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 12:30:36,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 12:30:36,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 12:30:36,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 12:30:36,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 12:30:36,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 12:30:36,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 12:30:36,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 12:30:36,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 12:30:36,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 12:30:36,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 12:30:36,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 12:30:36,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 12:30:36,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 12:30:36,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 12:30:36,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 12:30:36,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 12:30:36,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 12:30:36,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 12:30:36,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 12:30:36,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 12:30:36,044 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 [2020-10-16 12:30:36,099 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 12:30:36,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 12:30:36,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 12:30:36,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 12:30:36,103 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 12:30:36,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 12:30:36,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 12:30:36,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 12:30:36,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 12:30:36,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 12:30:36,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 12:30:36,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 12:30:36,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 12:30:36,105 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 12:30:36,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 12:30:36,106 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 12:30:36,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 12:30:36,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 12:30:36,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 12:30:36,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 12:30:36,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 12:30:36,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 12:30:36,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 12:30:36,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 12:30:36,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 12:30:36,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 12:30:36,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 12:30:36,109 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-16 12:30:36,109 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 12:30:36,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 12:30:36,110 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-16 12:30:36,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 12:30:36,411 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 12:30:36,414 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 12:30:36,416 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 12:30:36,416 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 12:30:36,417 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-16 12:30:36,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d6dc1dc2/85bad7be78884fca8c7468f00e731fd0/FLAGfee692987 [2020-10-16 12:30:37,077 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 12:30:37,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-16 12:30:37,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d6dc1dc2/85bad7be78884fca8c7468f00e731fd0/FLAGfee692987 [2020-10-16 12:30:37,342 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d6dc1dc2/85bad7be78884fca8c7468f00e731fd0 [2020-10-16 12:30:37,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 12:30:37,354 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 12:30:37,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 12:30:37,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 12:30:37,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 12:30:37,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:30:37" (1/1) ... [2020-10-16 12:30:37,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ffed5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:37, skipping insertion in model container [2020-10-16 12:30:37,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:30:37" (1/1) ... [2020-10-16 12:30:37,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 12:30:37,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 12:30:37,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:30:37,928 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 12:30:38,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:30:38,078 INFO L208 MainTranslator]: Completed translation [2020-10-16 12:30:38,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:38 WrapperNode [2020-10-16 12:30:38,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 12:30:38,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 12:30:38,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 12:30:38,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 12:30:38,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:38" (1/1) ... [2020-10-16 12:30:38,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:38" (1/1) ... [2020-10-16 12:30:38,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 12:30:38,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 12:30:38,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 12:30:38,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 12:30:38,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:38" (1/1) ... [2020-10-16 12:30:38,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:38" (1/1) ... [2020-10-16 12:30:38,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:38" (1/1) ... [2020-10-16 12:30:38,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:38" (1/1) ... [2020-10-16 12:30:38,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:38" (1/1) ... [2020-10-16 12:30:38,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:38" (1/1) ... [2020-10-16 12:30:38,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:38" (1/1) ... [2020-10-16 12:30:38,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 12:30:38,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 12:30:38,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 12:30:38,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 12:30:38,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:38" (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 [2020-10-16 12:30:38,225 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 12:30:38,225 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 12:30:38,225 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 12:30:38,225 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 12:30:38,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 12:30:38,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 12:30:38,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 12:30:38,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 12:30:38,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 12:30:38,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 12:30:38,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 12:30:38,228 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 12:30:38,523 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 12:30:38,524 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 12:30:38,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:30:38 BoogieIcfgContainer [2020-10-16 12:30:38,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 12:30:38,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 12:30:38,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 12:30:38,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 12:30:38,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 12:30:37" (1/3) ... [2020-10-16 12:30:38,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b05fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:30:38, skipping insertion in model container [2020-10-16 12:30:38,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:38" (2/3) ... [2020-10-16 12:30:38,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b05fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:30:38, skipping insertion in model container [2020-10-16 12:30:38,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:30:38" (3/3) ... [2020-10-16 12:30:38,538 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-16 12:30:38,553 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 12:30:38,554 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 12:30:38,564 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 12:30:38,566 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 12:30:38,600 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,601 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,601 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,602 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,602 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,602 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,603 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,603 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,603 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,604 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,604 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,604 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,605 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,605 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,605 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,606 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,606 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,606 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,607 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,607 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,607 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,607 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,608 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,608 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,608 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,609 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,609 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,614 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,620 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,620 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,621 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,621 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,621 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,622 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:38,624 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 12:30:38,640 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 12:30:38,664 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:30:38,664 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:30:38,664 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:30:38,664 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 12:30:38,665 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:30:38,665 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:30:38,665 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:30:38,665 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:30:38,679 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:30:38,679 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 12:30:38,681 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 12:30:38,683 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 12:30:38,726 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 12:30:38,727 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 12:30:38,734 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 12:30:38,737 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 12:30:39,705 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-16 12:30:39,919 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-16 12:30:39,919 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 12:30:39,929 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-16 12:30:39,942 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 12:30:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 12:30:39,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 12:30:39,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:39,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 12:30:39,964 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:39,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:39,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 12:30:39,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:40,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060861748] [2020-10-16 12:30:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:40,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060861748] [2020-10-16 12:30:40,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:30:40,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 12:30:40,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1913302271] [2020-10-16 12:30:40,228 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:40,233 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:40,250 INFO L258 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-10-16 12:30:40,250 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:40,259 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:30:40,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:30:40,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:40,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:30:40,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:30:40,279 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 12:30:40,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:40,350 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-16 12:30:40,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 12:30:40,352 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 12:30:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:40,363 INFO L225 Difference]: With dead ends: 75 [2020-10-16 12:30:40,363 INFO L226 Difference]: Without dead ends: 42 [2020-10-16 12:30:40,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:30:40,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-16 12:30:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-16 12:30:40,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-16 12:30:40,422 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-16 12:30:40,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:40,427 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-16 12:30:40,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:30:40,427 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-16 12:30:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 12:30:40,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:40,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:40,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 12:30:40,438 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:40,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:40,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-16 12:30:40,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:40,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696979252] [2020-10-16 12:30:40,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:40,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696979252] [2020-10-16 12:30:40,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:30:40,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:30:40,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1072493370] [2020-10-16 12:30:40,529 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:40,530 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:40,532 INFO L258 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-10-16 12:30:40,532 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:40,554 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:30:40,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:30:40,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:40,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:30:40,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:30:40,556 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-16 12:30:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:40,585 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-16 12:30:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:30:40,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 12:30:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:40,587 INFO L225 Difference]: With dead ends: 56 [2020-10-16 12:30:40,588 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 12:30:40,588 INFO L677 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 [2020-10-16 12:30:40,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 12:30:40,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 12:30:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:40,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-16 12:30:40,596 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-16 12:30:40,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:40,597 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-16 12:30:40,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:30:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-16 12:30:40,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 12:30:40,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:40,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:40,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 12:30:40,599 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:40,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:40,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-16 12:30:40,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:40,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484652120] [2020-10-16 12:30:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:40,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484652120] [2020-10-16 12:30:40,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:30:40,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 12:30:40,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1508514264] [2020-10-16 12:30:40,711 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:40,712 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:40,715 INFO L258 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-10-16 12:30:40,715 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:40,739 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:40,739 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:40,762 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:30:40,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 12:30:40,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:40,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 12:30:40,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-16 12:30:40,764 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-10-16 12:30:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:40,879 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-10-16 12:30:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 12:30:40,880 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-16 12:30:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:40,881 INFO L225 Difference]: With dead ends: 62 [2020-10-16 12:30:40,881 INFO L226 Difference]: Without dead ends: 44 [2020-10-16 12:30:40,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-16 12:30:40,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-10-16 12:30:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 12:30:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-16 12:30:40,888 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-10-16 12:30:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:40,888 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-16 12:30:40,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 12:30:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-16 12:30:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 12:30:40,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:40,889 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:40,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 12:30:40,890 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:40,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:40,890 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-10-16 12:30:40,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:40,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638204681] [2020-10-16 12:30:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:40,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638204681] [2020-10-16 12:30:40,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671106086] [2020-10-16 12:30:40,967 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 [2020-10-16 12:30:41,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:41,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:41,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 12:30:41,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:41,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:41,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 12:30:41,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [745171848] [2020-10-16 12:30:41,064 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:41,067 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:41,069 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-10-16 12:30:41,070 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:41,077 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:41,078 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:41,102 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:41,102 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:41,120 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:41,120 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:41,133 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:41,133 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:41,144 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-16 12:30:41,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:30:41,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:41,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:30:41,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:30:41,145 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-10-16 12:30:41,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:41,265 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-16 12:30:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 12:30:41,266 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 12:30:41,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:41,267 INFO L225 Difference]: With dead ends: 56 [2020-10-16 12:30:41,267 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 12:30:41,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:41,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 12:30:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 12:30:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-10-16 12:30:41,275 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-10-16 12:30:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:41,275 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-10-16 12:30:41,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:30:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-10-16 12:30:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 12:30:41,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:41,276 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:41,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:41,486 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:41,487 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-10-16 12:30:41,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:41,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258679487] [2020-10-16 12:30:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:41,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258679487] [2020-10-16 12:30:41,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251768773] [2020-10-16 12:30:41,549 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 [2020-10-16 12:30:41,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 12:30:41,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:41,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 12:30:41,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:41,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:41,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 12:30:41,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [896311078] [2020-10-16 12:30:41,639 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:41,640 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:41,643 INFO L258 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-10-16 12:30:41,643 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:41,659 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:41,659 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:41,679 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-16 12:30:41,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:30:41,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:41,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:30:41,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:30:41,681 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-10-16 12:30:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:41,877 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-10-16 12:30:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 12:30:41,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 12:30:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:41,879 INFO L225 Difference]: With dead ends: 66 [2020-10-16 12:30:41,880 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 12:30:41,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:30:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 12:30:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-10-16 12:30:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 12:30:41,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-10-16 12:30:41,888 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-10-16 12:30:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:41,888 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-10-16 12:30:41,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:30:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-10-16 12:30:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 12:30:41,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:41,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:42,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:42,092 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:42,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-10-16 12:30:42,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:42,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180991118] [2020-10-16 12:30:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:42,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180991118] [2020-10-16 12:30:42,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194123113] [2020-10-16 12:30:42,189 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 [2020-10-16 12:30:42,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:30:42,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:42,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 12:30:42,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:42,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:42,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 12:30:42,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1797162396] [2020-10-16 12:30:42,248 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:42,249 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:42,252 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-10-16 12:30:42,252 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:42,266 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:42,266 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:42,287 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:30:42,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 12:30:42,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:42,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 12:30:42,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-16 12:30:42,288 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-10-16 12:30:42,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:42,448 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-10-16 12:30:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 12:30:42,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 12:30:42,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:42,450 INFO L225 Difference]: With dead ends: 64 [2020-10-16 12:30:42,450 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 12:30:42,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:30:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 12:30:42,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-16 12:30:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 12:30:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-10-16 12:30:42,461 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-10-16 12:30:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:42,461 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-10-16 12:30:42,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 12:30:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-10-16 12:30:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 12:30:42,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:42,463 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:42,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:42,675 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:42,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-10-16 12:30:42,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:42,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666499994] [2020-10-16 12:30:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:42,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666499994] [2020-10-16 12:30:42,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138250946] [2020-10-16 12:30:42,740 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 [2020-10-16 12:30:42,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:42,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:42,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 12:30:42,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:42,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:42,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 12:30:42,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [574420438] [2020-10-16 12:30:42,815 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:42,816 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:42,832 INFO L258 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-10-16 12:30:42,833 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:42,872 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:42,873 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:42,904 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:30:42,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 12:30:42,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:42,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 12:30:42,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-16 12:30:42,905 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-10-16 12:30:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:43,114 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-10-16 12:30:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 12:30:43,114 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 12:30:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:43,115 INFO L225 Difference]: With dead ends: 63 [2020-10-16 12:30:43,115 INFO L226 Difference]: Without dead ends: 51 [2020-10-16 12:30:43,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:30:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-16 12:30:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-10-16 12:30:43,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 12:30:43,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-16 12:30:43,127 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-10-16 12:30:43,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:43,127 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-16 12:30:43,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 12:30:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-16 12:30:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 12:30:43,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:43,129 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:43,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:43,330 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:43,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:43,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-10-16 12:30:43,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:43,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10531804] [2020-10-16 12:30:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:43,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10531804] [2020-10-16 12:30:43,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74142603] [2020-10-16 12:30:43,442 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 [2020-10-16 12:30:43,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 12:30:43,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:43,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:30:43,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:43,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:43,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 12:30:43,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1352537778] [2020-10-16 12:30:43,509 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:43,510 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:43,514 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-10-16 12:30:43,514 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:43,530 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:43,530 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:43,546 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:43,547 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:43,566 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:43,566 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:43,572 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:43,573 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:43,581 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-16 12:30:43,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 12:30:43,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:43,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 12:30:43,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:30:43,582 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-10-16 12:30:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:43,725 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-10-16 12:30:43,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 12:30:43,726 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 12:30:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:43,726 INFO L225 Difference]: With dead ends: 60 [2020-10-16 12:30:43,727 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 12:30:43,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:30:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 12:30:43,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-16 12:30:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 12:30:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 12:30:43,732 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-10-16 12:30:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:43,732 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 12:30:43,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 12:30:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 12:30:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 12:30:43,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:43,733 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:43,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:43,945 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:43,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-10-16 12:30:43,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:43,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117665877] [2020-10-16 12:30:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:44,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117665877] [2020-10-16 12:30:44,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512949994] [2020-10-16 12:30:44,053 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 [2020-10-16 12:30:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:44,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:30:44,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:44,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:44,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 12:30:44,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [611023029] [2020-10-16 12:30:44,145 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:44,146 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:44,149 INFO L258 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-16 12:30:44,149 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:44,164 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:44,164 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:44,184 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-16 12:30:44,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 12:30:44,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:44,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 12:30:44,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:30:44,186 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-10-16 12:30:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:44,438 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-16 12:30:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 12:30:44,439 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 12:30:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:44,439 INFO L225 Difference]: With dead ends: 74 [2020-10-16 12:30:44,440 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 12:30:44,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:30:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 12:30:44,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-16 12:30:44,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 12:30:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-10-16 12:30:44,446 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-10-16 12:30:44,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:44,446 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-10-16 12:30:44,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 12:30:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-10-16 12:30:44,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 12:30:44,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:44,447 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:44,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:44,661 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:44,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-10-16 12:30:44,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:44,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602470044] [2020-10-16 12:30:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:44,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602470044] [2020-10-16 12:30:44,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138264168] [2020-10-16 12:30:44,738 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 [2020-10-16 12:30:44,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:44,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:44,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:30:44,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:44,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:44,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 12:30:44,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [304177845] [2020-10-16 12:30:44,801 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:44,802 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:44,804 INFO L258 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-16 12:30:44,804 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:44,817 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:44,817 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:44,832 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:30:44,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 12:30:44,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:44,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 12:30:44,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:30:44,834 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-10-16 12:30:45,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:45,108 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-10-16 12:30:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 12:30:45,109 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 12:30:45,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:45,110 INFO L225 Difference]: With dead ends: 74 [2020-10-16 12:30:45,110 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 12:30:45,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:30:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 12:30:45,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-10-16 12:30:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-16 12:30:45,115 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-10-16 12:30:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:45,115 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-16 12:30:45,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 12:30:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-16 12:30:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 12:30:45,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:45,116 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:45,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 12:30:45,327 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-10-16 12:30:45,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:45,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360326347] [2020-10-16 12:30:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:45,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360326347] [2020-10-16 12:30:45,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110925777] [2020-10-16 12:30:45,408 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 [2020-10-16 12:30:45,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 12:30:45,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:45,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:30:45,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:45,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:45,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 12:30:45,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2102685591] [2020-10-16 12:30:45,479 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:45,481 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:45,483 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-10-16 12:30:45,483 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:45,503 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:45,503 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:45,519 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:30:45,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 12:30:45,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:45,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 12:30:45,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 12:30:45,521 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-10-16 12:30:45,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:45,718 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-10-16 12:30:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 12:30:45,718 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 12:30:45,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:45,719 INFO L225 Difference]: With dead ends: 70 [2020-10-16 12:30:45,720 INFO L226 Difference]: Without dead ends: 64 [2020-10-16 12:30:45,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:30:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-16 12:30:45,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-10-16 12:30:45,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 12:30:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-10-16 12:30:45,725 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-10-16 12:30:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:45,725 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-10-16 12:30:45,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 12:30:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-10-16 12:30:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 12:30:45,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:45,726 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:45,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 12:30:45,938 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:45,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-10-16 12:30:45,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:45,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262331801] [2020-10-16 12:30:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:46,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262331801] [2020-10-16 12:30:46,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749641456] [2020-10-16 12:30:46,054 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 [2020-10-16 12:30:46,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:30:46,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:46,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:30:46,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:46,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:46,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 12:30:46,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1730420301] [2020-10-16 12:30:46,112 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:46,113 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:46,115 INFO L258 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-10-16 12:30:46,116 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:46,143 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:46,144 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:46,160 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:30:46,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 12:30:46,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:46,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 12:30:46,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-16 12:30:46,162 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-10-16 12:30:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:46,415 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-16 12:30:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 12:30:46,416 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 12:30:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:46,417 INFO L225 Difference]: With dead ends: 69 [2020-10-16 12:30:46,417 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 12:30:46,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:30:46,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 12:30:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-10-16 12:30:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 12:30:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-10-16 12:30:46,428 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-10-16 12:30:46,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:46,429 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-10-16 12:30:46,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 12:30:46,429 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-10-16 12:30:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 12:30:46,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:46,433 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:46,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:46,634 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:46,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-10-16 12:30:46,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:46,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31013605] [2020-10-16 12:30:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:46,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31013605] [2020-10-16 12:30:46,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064715039] [2020-10-16 12:30:46,725 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 [2020-10-16 12:30:46,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 12:30:46,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:46,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:30:46,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:46,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:46,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 12:30:46,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1635733001] [2020-10-16 12:30:46,780 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:46,781 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:46,783 INFO L258 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-10-16 12:30:46,784 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:46,806 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:46,806 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:46,821 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:30:46,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 12:30:46,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:46,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 12:30:46,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 12:30:46,823 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-10-16 12:30:47,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:47,106 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-10-16 12:30:47,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 12:30:47,107 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 12:30:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:47,108 INFO L225 Difference]: With dead ends: 69 [2020-10-16 12:30:47,108 INFO L226 Difference]: Without dead ends: 57 [2020-10-16 12:30:47,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:30:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-16 12:30:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-10-16 12:30:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-16 12:30:47,116 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-10-16 12:30:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:47,116 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-16 12:30:47,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 12:30:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-16 12:30:47,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:30:47,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:47,117 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:47,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:47,323 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-10-16 12:30:47,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:47,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135271781] [2020-10-16 12:30:47,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:47,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135271781] [2020-10-16 12:30:47,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892896389] [2020-10-16 12:30:47,428 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 [2020-10-16 12:30:47,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 12:30:47,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:47,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:30:47,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:47,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:47,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 12:30:47,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [443491112] [2020-10-16 12:30:47,538 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:47,540 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:47,547 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-10-16 12:30:47,548 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:47,569 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:47,570 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:47,588 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:47,588 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:47,600 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:47,600 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:47,608 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:47,608 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:47,614 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-16 12:30:47,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:30:47,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:47,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:30:47,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:47,616 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-10-16 12:30:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:47,815 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-10-16 12:30:47,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 12:30:47,816 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 12:30:47,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:47,817 INFO L225 Difference]: With dead ends: 66 [2020-10-16 12:30:47,817 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 12:30:47,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:30:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 12:30:47,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-16 12:30:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 12:30:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-16 12:30:47,822 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-10-16 12:30:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:47,822 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-16 12:30:47,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:30:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-16 12:30:47,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:30:47,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:47,823 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:48,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 12:30:48,034 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:48,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:48,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-10-16 12:30:48,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:48,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584068187] [2020-10-16 12:30:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:48,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584068187] [2020-10-16 12:30:48,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202335449] [2020-10-16 12:30:48,134 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 [2020-10-16 12:30:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:48,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:30:48,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:48,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:48,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 12:30:48,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1199052206] [2020-10-16 12:30:48,196 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:48,198 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:48,200 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-16 12:30:48,200 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:48,210 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:48,211 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:48,237 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-16 12:30:48,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:30:48,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:48,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:30:48,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:48,238 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-10-16 12:30:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:48,531 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-10-16 12:30:48,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 12:30:48,532 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 12:30:48,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:48,532 INFO L225 Difference]: With dead ends: 82 [2020-10-16 12:30:48,533 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 12:30:48,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:30:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 12:30:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-16 12:30:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 12:30:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-10-16 12:30:48,543 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-10-16 12:30:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:48,543 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-10-16 12:30:48,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:30:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-10-16 12:30:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:30:48,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:48,544 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:48,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 12:30:48,746 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:48,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:48,746 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-10-16 12:30:48,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:48,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37760639] [2020-10-16 12:30:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:48,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37760639] [2020-10-16 12:30:48,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875459141] [2020-10-16 12:30:48,825 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 [2020-10-16 12:30:48,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:48,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:48,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:30:48,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:48,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:48,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 12:30:48,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [167976675] [2020-10-16 12:30:48,884 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:48,885 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:48,888 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-16 12:30:48,888 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:48,896 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:48,897 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:48,924 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:30:48,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:30:48,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:48,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:30:48,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:48,925 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-10-16 12:30:49,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:49,266 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-16 12:30:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:30:49,267 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 12:30:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:49,268 INFO L225 Difference]: With dead ends: 81 [2020-10-16 12:30:49,268 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 12:30:49,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:30:49,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 12:30:49,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-10-16 12:30:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 12:30:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-10-16 12:30:49,273 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-10-16 12:30:49,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:49,273 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-10-16 12:30:49,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:30:49,273 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-10-16 12:30:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:30:49,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:49,274 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:49,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 12:30:49,484 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:49,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:49,484 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-10-16 12:30:49,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:49,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302210261] [2020-10-16 12:30:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:49,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302210261] [2020-10-16 12:30:49,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790283810] [2020-10-16 12:30:49,554 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 [2020-10-16 12:30:49,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 12:30:49,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:49,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:30:49,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:49,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:49,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 12:30:49,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1336880433] [2020-10-16 12:30:49,630 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:49,632 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:49,634 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-16 12:30:49,634 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:49,635 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:49,636 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:49,662 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:30:49,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:30:49,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:49,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:30:49,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:49,663 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-10-16 12:30:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:50,034 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-10-16 12:30:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 12:30:50,040 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 12:30:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:50,041 INFO L225 Difference]: With dead ends: 82 [2020-10-16 12:30:50,041 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 12:30:50,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:30:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 12:30:50,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-10-16 12:30:50,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 12:30:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-16 12:30:50,044 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-10-16 12:30:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:50,044 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-16 12:30:50,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:30:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-16 12:30:50,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 12:30:50,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:50,045 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:50,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:50,245 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:50,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:50,246 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-10-16 12:30:50,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:50,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26191056] [2020-10-16 12:30:50,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:50,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26191056] [2020-10-16 12:30:50,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924413532] [2020-10-16 12:30:50,345 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 [2020-10-16 12:30:50,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:30:50,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:50,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:30:50,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:50,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:50,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 12:30:50,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [100053191] [2020-10-16 12:30:50,408 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:50,409 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:50,412 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-10-16 12:30:50,412 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:50,425 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:50,425 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:50,461 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:30:50,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:30:50,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:50,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:30:50,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:50,462 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-10-16 12:30:50,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:50,731 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-16 12:30:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 12:30:50,732 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 12:30:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:50,733 INFO L225 Difference]: With dead ends: 78 [2020-10-16 12:30:50,733 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 12:30:50,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:30:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 12:30:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-16 12:30:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 12:30:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-10-16 12:30:50,737 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-10-16 12:30:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:50,737 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-10-16 12:30:50,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:30:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-10-16 12:30:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 12:30:50,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:50,738 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:50,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 12:30:50,946 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:50,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-10-16 12:30:50,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:50,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801050279] [2020-10-16 12:30:50,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:51,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801050279] [2020-10-16 12:30:51,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307983955] [2020-10-16 12:30:51,056 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 [2020-10-16 12:30:51,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 12:30:51,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:51,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:30:51,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:51,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:51,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 12:30:51,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1018472543] [2020-10-16 12:30:51,145 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:51,147 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:51,150 INFO L258 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-16 12:30:51,150 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:51,154 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:51,154 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:51,194 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:30:51,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:30:51,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:51,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:30:51,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:51,195 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-10-16 12:30:51,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:51,509 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-10-16 12:30:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 12:30:51,510 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 12:30:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:51,511 INFO L225 Difference]: With dead ends: 75 [2020-10-16 12:30:51,511 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 12:30:51,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:30:51,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 12:30:51,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-16 12:30:51,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 12:30:51,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-16 12:30:51,514 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-10-16 12:30:51,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:51,514 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-16 12:30:51,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:30:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-16 12:30:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 12:30:51,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:51,515 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:51,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:51,725 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:51,726 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-10-16 12:30:51,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:51,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804083357] [2020-10-16 12:30:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:51,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804083357] [2020-10-16 12:30:51,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037703413] [2020-10-16 12:30:51,804 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 [2020-10-16 12:30:51,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 12:30:51,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:51,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:30:51,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:51,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:51,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 12:30:51,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [108749436] [2020-10-16 12:30:51,879 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:51,881 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:51,883 INFO L258 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-16 12:30:51,884 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:51,888 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:51,888 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:51,912 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:30:51,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:30:51,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:51,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:30:51,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:51,914 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-10-16 12:30:52,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:52,259 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-10-16 12:30:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:30:52,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 12:30:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:52,265 INFO L225 Difference]: With dead ends: 75 [2020-10-16 12:30:52,265 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 12:30:52,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:30:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 12:30:52,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-10-16 12:30:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 12:30:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-10-16 12:30:52,269 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-10-16 12:30:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:52,269 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-10-16 12:30:52,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:30:52,269 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-10-16 12:30:52,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 12:30:52,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:52,270 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:52,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:52,471 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:52,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:52,472 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-10-16 12:30:52,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:52,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718736110] [2020-10-16 12:30:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:52,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718736110] [2020-10-16 12:30:52,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161991559] [2020-10-16 12:30:52,558 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 [2020-10-16 12:30:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:52,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:30:52,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:52,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:52,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 12:30:52,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1399592031] [2020-10-16 12:30:52,634 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:52,636 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:52,639 INFO L258 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-16 12:30:52,639 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:52,644 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:52,645 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:52,680 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-16 12:30:52,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:30:52,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:52,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:30:52,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:52,681 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-10-16 12:30:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:53,202 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-10-16 12:30:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 12:30:53,203 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 12:30:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:53,204 INFO L225 Difference]: With dead ends: 75 [2020-10-16 12:30:53,204 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 12:30:53,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:30:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 12:30:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-16 12:30:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 12:30:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 12:30:53,208 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-10-16 12:30:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:53,208 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 12:30:53,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:30:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 12:30:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:53,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:53,209 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:53,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 12:30:53,418 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:53,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:53,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-10-16 12:30:53,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:53,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8471811] [2020-10-16 12:30:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:53,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8471811] [2020-10-16 12:30:53,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039261652] [2020-10-16 12:30:53,608 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:53,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:53,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:53,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:53,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:53,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:53,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:53,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [282883856] [2020-10-16 12:30:53,737 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:53,740 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:53,744 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-10-16 12:30:53,745 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:53,753 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:53,753 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:53,782 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:53,782 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:53,798 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:53,798 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:53,814 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:53,814 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:53,826 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-16 12:30:53,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:53,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:53,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:53,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:53,827 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-10-16 12:30:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:54,167 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-10-16 12:30:54,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 12:30:54,168 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:54,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:54,169 INFO L225 Difference]: With dead ends: 72 [2020-10-16 12:30:54,170 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 12:30:54,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:30:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 12:30:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-16 12:30:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 12:30:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-16 12:30:54,174 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-10-16 12:30:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:54,175 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-16 12:30:54,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-16 12:30:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:54,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:54,176 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:54,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:54,377 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:54,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:54,377 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-10-16 12:30:54,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:54,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607638770] [2020-10-16 12:30:54,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:54,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607638770] [2020-10-16 12:30:54,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970120216] [2020-10-16 12:30:54,487 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 [2020-10-16 12:30:54,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 12:30:54,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:54,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:54,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:54,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:54,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:54,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1327731740] [2020-10-16 12:30:54,590 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:54,592 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:54,596 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-16 12:30:54,597 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:54,598 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:54,599 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:54,632 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-16 12:30:54,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:54,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:54,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:54,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:54,633 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-10-16 12:30:54,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:54,997 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-10-16 12:30:54,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:30:54,998 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:54,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:54,998 INFO L225 Difference]: With dead ends: 92 [2020-10-16 12:30:54,999 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 12:30:54,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:30:54,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 12:30:55,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-10-16 12:30:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 12:30:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-10-16 12:30:55,003 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-10-16 12:30:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:55,003 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-10-16 12:30:55,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-10-16 12:30:55,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:55,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:55,004 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:55,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 12:30:55,208 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:55,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:55,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-10-16 12:30:55,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:55,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388218624] [2020-10-16 12:30:55,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:55,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388218624] [2020-10-16 12:30:55,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667801218] [2020-10-16 12:30:55,302 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 [2020-10-16 12:30:55,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:30:55,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:55,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:55,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:55,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:55,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:55,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [56900570] [2020-10-16 12:30:55,377 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:55,378 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:55,381 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-16 12:30:55,381 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:55,402 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:55,402 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:55,419 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:30:55,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:55,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:55,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:55,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:55,420 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-10-16 12:30:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:55,814 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-10-16 12:30:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:30:55,815 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:55,816 INFO L225 Difference]: With dead ends: 89 [2020-10-16 12:30:55,816 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 12:30:55,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-16 12:30:55,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 12:30:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-10-16 12:30:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 12:30:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-10-16 12:30:55,820 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-10-16 12:30:55,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:55,820 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-10-16 12:30:55,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-10-16 12:30:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:55,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:55,821 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:56,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 12:30:56,022 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:56,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:56,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-10-16 12:30:56,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:56,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735270824] [2020-10-16 12:30:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:56,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735270824] [2020-10-16 12:30:56,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098796379] [2020-10-16 12:30:56,118 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 [2020-10-16 12:30:56,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 12:30:56,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:56,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:56,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:56,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:56,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:56,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [879922354] [2020-10-16 12:30:56,200 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:56,201 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:56,204 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-16 12:30:56,204 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:56,205 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:56,206 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:56,246 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:30:56,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:56,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:56,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:56,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:56,247 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-10-16 12:30:56,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:56,707 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-10-16 12:30:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:30:56,708 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:56,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:56,709 INFO L225 Difference]: With dead ends: 89 [2020-10-16 12:30:56,709 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 12:30:56,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 12:30:56,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 12:30:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-16 12:30:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 12:30:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-10-16 12:30:56,714 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-10-16 12:30:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:56,714 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-10-16 12:30:56,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-10-16 12:30:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:56,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:56,715 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:56,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:56,923 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:56,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:56,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-10-16 12:30:56,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:56,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751685310] [2020-10-16 12:30:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:57,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751685310] [2020-10-16 12:30:57,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588702563] [2020-10-16 12:30:57,016 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 [2020-10-16 12:30:57,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 12:30:57,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:57,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:57,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:57,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:57,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:57,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2069004222] [2020-10-16 12:30:57,114 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:57,116 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:57,121 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-16 12:30:57,121 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:57,122 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:57,122 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:57,157 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:30:57,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:57,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:57,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:57,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:57,158 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-10-16 12:30:57,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:57,709 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-10-16 12:30:57,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 12:30:57,709 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:57,711 INFO L225 Difference]: With dead ends: 90 [2020-10-16 12:30:57,711 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 12:30:57,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 12:30:57,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 12:30:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-10-16 12:30:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 12:30:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-16 12:30:57,715 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-10-16 12:30:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:57,715 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-16 12:30:57,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:57,716 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-16 12:30:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:30:57,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:57,716 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:57,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 12:30:57,927 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:57,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-10-16 12:30:57,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:57,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929876913] [2020-10-16 12:30:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:58,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929876913] [2020-10-16 12:30:58,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625155759] [2020-10-16 12:30:58,050 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 [2020-10-16 12:30:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:58,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:30:58,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:58,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:58,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:30:58,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [997196427] [2020-10-16 12:30:58,109 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:58,110 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:58,113 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-10-16 12:30:58,114 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:58,123 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:58,124 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:58,146 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6427#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:30:58,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:30:58,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:58,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:30:58,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:30:58,147 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 15 states. [2020-10-16 12:30:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:58,472 INFO L93 Difference]: Finished difference Result 86 states and 198 transitions. [2020-10-16 12:30:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 12:30:58,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:30:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:58,474 INFO L225 Difference]: With dead ends: 86 [2020-10-16 12:30:58,475 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 12:30:58,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:30:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 12:30:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-16 12:30:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 12:30:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 140 transitions. [2020-10-16 12:30:58,481 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 140 transitions. Word has length 18 [2020-10-16 12:30:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:58,481 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 140 transitions. [2020-10-16 12:30:58,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:30:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 140 transitions. [2020-10-16 12:30:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:30:58,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:58,483 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:58,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:58,684 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:58,684 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 26 times [2020-10-16 12:30:58,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:58,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087136289] [2020-10-16 12:30:58,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:58,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087136289] [2020-10-16 12:30:58,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513752677] [2020-10-16 12:30:58,896 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 [2020-10-16 12:30:58,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:58,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:58,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:30:58,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:59,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:59,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:30:59,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1354933205] [2020-10-16 12:30:59,020 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:59,023 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:59,028 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-16 12:30:59,029 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:59,047 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:59,047 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:59,073 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6719#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:30:59,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:30:59,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:59,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:30:59,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:30:59,075 INFO L87 Difference]: Start difference. First operand 57 states and 140 transitions. Second operand 15 states. [2020-10-16 12:30:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:59,500 INFO L93 Difference]: Finished difference Result 83 states and 194 transitions. [2020-10-16 12:30:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:30:59,501 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:30:59,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:59,502 INFO L225 Difference]: With dead ends: 83 [2020-10-16 12:30:59,502 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 12:30:59,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:30:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 12:30:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-10-16 12:30:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 12:30:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 146 transitions. [2020-10-16 12:30:59,509 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 146 transitions. Word has length 18 [2020-10-16 12:30:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:59,510 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 146 transitions. [2020-10-16 12:30:59,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:30:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 146 transitions. [2020-10-16 12:30:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:30:59,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:59,511 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:59,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 12:30:59,724 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:59,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 27 times [2020-10-16 12:30:59,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:59,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782588734] [2020-10-16 12:30:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:59,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782588734] [2020-10-16 12:30:59,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953780082] [2020-10-16 12:30:59,831 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 [2020-10-16 12:30:59,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 12:30:59,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:59,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:30:59,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:59,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:59,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:30:59,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [301948450] [2020-10-16 12:30:59,899 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:59,901 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:59,904 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-16 12:30:59,904 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:59,926 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:59,927 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:59,943 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7016#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:30:59,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:30:59,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:59,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:30:59,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:30:59,945 INFO L87 Difference]: Start difference. First operand 59 states and 146 transitions. Second operand 15 states. [2020-10-16 12:31:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:00,362 INFO L93 Difference]: Finished difference Result 81 states and 192 transitions. [2020-10-16 12:31:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:31:00,362 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:31:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:00,363 INFO L225 Difference]: With dead ends: 81 [2020-10-16 12:31:00,363 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 12:31:00,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2020-10-16 12:31:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 12:31:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-16 12:31:00,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 12:31:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 152 transitions. [2020-10-16 12:31:00,367 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 152 transitions. Word has length 18 [2020-10-16 12:31:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:00,367 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 152 transitions. [2020-10-16 12:31:00,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:31:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 152 transitions. [2020-10-16 12:31:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:31:00,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:00,368 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:00,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 12:31:00,569 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 28 times [2020-10-16 12:31:00,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:00,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323710122] [2020-10-16 12:31:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:00,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323710122] [2020-10-16 12:31:00,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121239808] [2020-10-16 12:31:00,668 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 [2020-10-16 12:31:00,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:00,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:00,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:31:00,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:00,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:00,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:31:00,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1427470586] [2020-10-16 12:31:00,753 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:00,757 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:00,760 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-16 12:31:00,761 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:00,774 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:00,774 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:00,793 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7319#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-16 12:31:00,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:31:00,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:00,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:31:00,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:31:00,794 INFO L87 Difference]: Start difference. First operand 61 states and 152 transitions. Second operand 15 states. [2020-10-16 12:31:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:01,258 INFO L93 Difference]: Finished difference Result 81 states and 195 transitions. [2020-10-16 12:31:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:01,258 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:31:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:01,259 INFO L225 Difference]: With dead ends: 81 [2020-10-16 12:31:01,259 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 12:31:01,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 12:31:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 12:31:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-10-16 12:31:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 12:31:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-10-16 12:31:01,267 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 18 [2020-10-16 12:31:01,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:01,267 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-10-16 12:31:01,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:31:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-10-16 12:31:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:31:01,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:01,268 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:01,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:01,478 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:01,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:01,479 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 29 times [2020-10-16 12:31:01,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:01,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198492636] [2020-10-16 12:31:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:01,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198492636] [2020-10-16 12:31:01,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136914181] [2020-10-16 12:31:01,627 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 [2020-10-16 12:31:01,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 12:31:01,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:01,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:31:01,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:01,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:01,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:31:01,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1686667990] [2020-10-16 12:31:01,698 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:01,700 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:01,703 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-16 12:31:01,703 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:01,715 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:01,715 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:01,734 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7630#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-16 12:31:01,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:31:01,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:01,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:31:01,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:31:01,735 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 15 states. [2020-10-16 12:31:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:02,240 INFO L93 Difference]: Finished difference Result 81 states and 203 transitions. [2020-10-16 12:31:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 12:31:02,241 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:31:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:02,242 INFO L225 Difference]: With dead ends: 81 [2020-10-16 12:31:02,242 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 12:31:02,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 12:31:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 12:31:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2020-10-16 12:31:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 12:31:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-16 12:31:02,245 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 18 [2020-10-16 12:31:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:02,246 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-16 12:31:02,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:31:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-16 12:31:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:31:02,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:02,246 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:02,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:02,456 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:02,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:02,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 30 times [2020-10-16 12:31:02,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:02,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637767783] [2020-10-16 12:31:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:02,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637767783] [2020-10-16 12:31:02,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853367906] [2020-10-16 12:31:02,600 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 [2020-10-16 12:31:02,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 12:31:02,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:02,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 12:31:02,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:02,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:02,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 12:31:02,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1010664675] [2020-10-16 12:31:02,679 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:02,681 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:02,687 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2020-10-16 12:31:02,687 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:02,689 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:02,689 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:02,710 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:02,711 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:02,732 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:02,733 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:02,766 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:02,766 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:02,773 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7923#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-16 12:31:02,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 12:31:02,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:02,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 12:31:02,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:31:02,774 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 16 states. [2020-10-16 12:31:03,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:03,103 INFO L93 Difference]: Finished difference Result 78 states and 182 transitions. [2020-10-16 12:31:03,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:31:03,104 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 12:31:03,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:03,105 INFO L225 Difference]: With dead ends: 78 [2020-10-16 12:31:03,105 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 12:31:03,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:31:03,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 12:31:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-16 12:31:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 12:31:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-16 12:31:03,110 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 19 [2020-10-16 12:31:03,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:03,111 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-16 12:31:03,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 12:31:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-16 12:31:03,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:31:03,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:03,114 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:03,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 12:31:03,325 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:03,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 31 times [2020-10-16 12:31:03,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:03,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752707108] [2020-10-16 12:31:03,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:03,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752707108] [2020-10-16 12:31:03,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47005911] [2020-10-16 12:31:03,466 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 [2020-10-16 12:31:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:03,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 12:31:03,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:03,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:03,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 12:31:03,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2085486670] [2020-10-16 12:31:03,539 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:03,540 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:03,544 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-16 12:31:03,544 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:03,554 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:03,554 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:03,577 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8213#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-16 12:31:03,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 12:31:03,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:03,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 12:31:03,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:31:03,578 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 16 states. [2020-10-16 12:31:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:04,036 INFO L93 Difference]: Finished difference Result 102 states and 232 transitions. [2020-10-16 12:31:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:31:04,036 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 12:31:04,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:04,037 INFO L225 Difference]: With dead ends: 102 [2020-10-16 12:31:04,037 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 12:31:04,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 12:31:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 12:31:04,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2020-10-16 12:31:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 12:31:04,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 148 transitions. [2020-10-16 12:31:04,044 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 148 transitions. Word has length 19 [2020-10-16 12:31:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:04,044 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 148 transitions. [2020-10-16 12:31:04,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 12:31:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 148 transitions. [2020-10-16 12:31:04,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:31:04,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:04,045 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:04,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:04,255 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:04,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:04,256 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 32 times [2020-10-16 12:31:04,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:04,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341737666] [2020-10-16 12:31:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:04,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341737666] [2020-10-16 12:31:04,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970816844] [2020-10-16 12:31:04,407 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 [2020-10-16 12:31:04,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:04,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:04,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 12:31:04,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:04,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:04,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 12:31:04,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1062894187] [2020-10-16 12:31:04,495 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:04,497 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:04,503 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-16 12:31:04,503 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:04,509 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:04,509 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:04,541 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8539#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:31:04,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 12:31:04,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:04,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 12:31:04,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:31:04,542 INFO L87 Difference]: Start difference. First operand 60 states and 148 transitions. Second operand 16 states. [2020-10-16 12:31:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:04,962 INFO L93 Difference]: Finished difference Result 99 states and 228 transitions. [2020-10-16 12:31:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:04,967 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 12:31:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:04,968 INFO L225 Difference]: With dead ends: 99 [2020-10-16 12:31:04,968 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 12:31:04,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 12:31:04,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 12:31:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2020-10-16 12:31:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 12:31:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 154 transitions. [2020-10-16 12:31:04,972 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 154 transitions. Word has length 19 [2020-10-16 12:31:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:04,972 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 154 transitions. [2020-10-16 12:31:04,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 12:31:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 154 transitions. [2020-10-16 12:31:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:31:04,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:04,973 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:05,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 12:31:05,174 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:05,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:05,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 33 times [2020-10-16 12:31:05,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:05,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780430979] [2020-10-16 12:31:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:05,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780430979] [2020-10-16 12:31:05,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560819725] [2020-10-16 12:31:05,293 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 [2020-10-16 12:31:05,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 12:31:05,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:05,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 12:31:05,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:05,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:05,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 12:31:05,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [710002352] [2020-10-16 12:31:05,368 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:05,370 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:05,373 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-16 12:31:05,374 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:05,384 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:05,384 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:05,404 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8870#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:31:05,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 12:31:05,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:05,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 12:31:05,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:31:05,405 INFO L87 Difference]: Start difference. First operand 62 states and 154 transitions. Second operand 16 states. [2020-10-16 12:31:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:05,917 INFO L93 Difference]: Finished difference Result 97 states and 226 transitions. [2020-10-16 12:31:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:05,918 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 12:31:05,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:05,919 INFO L225 Difference]: With dead ends: 97 [2020-10-16 12:31:05,919 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 12:31:05,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 12:31:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 12:31:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2020-10-16 12:31:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 12:31:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 160 transitions. [2020-10-16 12:31:05,924 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 160 transitions. Word has length 19 [2020-10-16 12:31:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:05,924 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 160 transitions. [2020-10-16 12:31:05,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 12:31:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 160 transitions. [2020-10-16 12:31:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:31:05,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:05,925 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:06,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 12:31:06,136 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:06,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:06,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 34 times [2020-10-16 12:31:06,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:06,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445575842] [2020-10-16 12:31:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:06,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445575842] [2020-10-16 12:31:06,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631052643] [2020-10-16 12:31:06,243 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 [2020-10-16 12:31:06,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:06,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:06,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 12:31:06,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:06,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:06,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 12:31:06,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [735632124] [2020-10-16 12:31:06,307 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:06,308 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:06,311 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-16 12:31:06,311 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:06,326 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:06,326 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:06,348 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9207#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:31:06,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 12:31:06,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:06,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 12:31:06,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:31:06,350 INFO L87 Difference]: Start difference. First operand 64 states and 160 transitions. Second operand 16 states. [2020-10-16 12:31:06,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:06,923 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-16 12:31:06,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:06,923 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 12:31:06,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:06,924 INFO L225 Difference]: With dead ends: 97 [2020-10-16 12:31:06,925 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 12:31:06,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=1039, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 12:31:06,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 12:31:06,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-16 12:31:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 12:31:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 168 transitions. [2020-10-16 12:31:06,928 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 168 transitions. Word has length 19 [2020-10-16 12:31:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:06,929 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 168 transitions. [2020-10-16 12:31:06,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 12:31:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 168 transitions. [2020-10-16 12:31:06,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:31:06,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:06,929 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:07,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 12:31:07,140 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:07,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:07,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 35 times [2020-10-16 12:31:07,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:07,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528381985] [2020-10-16 12:31:07,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:07,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528381985] [2020-10-16 12:31:07,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768940066] [2020-10-16 12:31:07,257 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 [2020-10-16 12:31:07,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 12:31:07,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:07,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 12:31:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:07,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:07,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 12:31:07,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [825009293] [2020-10-16 12:31:07,336 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:07,338 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:07,342 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-16 12:31:07,342 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:07,353 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:07,354 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:07,375 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9552#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-16 12:31:07,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 12:31:07,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:07,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 12:31:07,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:31:07,376 INFO L87 Difference]: Start difference. First operand 66 states and 168 transitions. Second operand 16 states. [2020-10-16 12:31:07,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:07,964 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-16 12:31:07,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 12:31:07,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 12:31:07,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:07,966 INFO L225 Difference]: With dead ends: 98 [2020-10-16 12:31:07,966 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 12:31:07,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=526, Invalid=1114, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 12:31:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 12:31:07,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2020-10-16 12:31:07,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 12:31:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-16 12:31:07,973 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 19 [2020-10-16 12:31:07,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:07,974 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-16 12:31:07,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 12:31:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-16 12:31:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 12:31:07,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:07,975 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:08,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 12:31:08,187 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:08,188 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 36 times [2020-10-16 12:31:08,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:08,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96423310] [2020-10-16 12:31:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:08,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96423310] [2020-10-16 12:31:08,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808975847] [2020-10-16 12:31:08,328 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 [2020-10-16 12:31:08,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 12:31:08,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:08,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:31:08,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:08,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:08,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 12:31:08,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2108870110] [2020-10-16 12:31:08,392 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:08,394 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:08,398 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2020-10-16 12:31:08,398 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:08,407 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:08,407 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:08,427 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9882#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:31:08,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:31:08,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:08,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:31:08,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:31:08,428 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 17 states. [2020-10-16 12:31:08,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:08,754 INFO L93 Difference]: Finished difference Result 94 states and 216 transitions. [2020-10-16 12:31:08,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:31:08,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 12:31:08,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:08,756 INFO L225 Difference]: With dead ends: 94 [2020-10-16 12:31:08,756 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 12:31:08,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2020-10-16 12:31:08,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 12:31:08,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2020-10-16 12:31:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 12:31:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2020-10-16 12:31:08,760 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 20 [2020-10-16 12:31:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:08,760 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2020-10-16 12:31:08,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:31:08,760 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2020-10-16 12:31:08,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 12:31:08,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:08,761 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:08,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 12:31:08,970 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:08,970 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 37 times [2020-10-16 12:31:08,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:08,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119173845] [2020-10-16 12:31:08,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:09,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119173845] [2020-10-16 12:31:09,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127135383] [2020-10-16 12:31:09,104 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 [2020-10-16 12:31:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:09,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:31:09,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:09,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:09,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 12:31:09,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [92282937] [2020-10-16 12:31:09,198 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:09,212 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:09,216 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-16 12:31:09,216 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:09,226 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:09,227 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:09,261 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10202#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:31:09,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:31:09,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:09,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:31:09,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:31:09,262 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand 17 states. [2020-10-16 12:31:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:09,724 INFO L93 Difference]: Finished difference Result 91 states and 212 transitions. [2020-10-16 12:31:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:31:09,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 12:31:09,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:09,725 INFO L225 Difference]: With dead ends: 91 [2020-10-16 12:31:09,726 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 12:31:09,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 12:31:09,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 12:31:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2020-10-16 12:31:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 12:31:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 156 transitions. [2020-10-16 12:31:09,729 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 156 transitions. Word has length 20 [2020-10-16 12:31:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:09,729 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 156 transitions. [2020-10-16 12:31:09,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:31:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 156 transitions. [2020-10-16 12:31:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 12:31:09,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:09,730 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:09,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 12:31:09,939 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:09,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:09,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 38 times [2020-10-16 12:31:09,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:09,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062090002] [2020-10-16 12:31:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062090002] [2020-10-16 12:31:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040209901] [2020-10-16 12:31:10,107 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:10,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:10,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:10,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:31:10,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:10,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:10,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 12:31:10,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [898952993] [2020-10-16 12:31:10,170 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:10,171 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:10,175 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-16 12:31:10,175 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:10,177 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:10,177 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:10,211 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10527#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:31:10,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:31:10,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:10,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:31:10,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:31:10,212 INFO L87 Difference]: Start difference. First operand 63 states and 156 transitions. Second operand 17 states. [2020-10-16 12:31:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:10,679 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2020-10-16 12:31:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:10,679 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 12:31:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:10,680 INFO L225 Difference]: With dead ends: 89 [2020-10-16 12:31:10,680 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 12:31:10,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 12:31:10,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 12:31:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-10-16 12:31:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 12:31:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 162 transitions. [2020-10-16 12:31:10,686 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 162 transitions. Word has length 20 [2020-10-16 12:31:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:10,686 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 162 transitions. [2020-10-16 12:31:10,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:31:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 162 transitions. [2020-10-16 12:31:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 12:31:10,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:10,687 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:10,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 12:31:10,891 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:10,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:10,891 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 39 times [2020-10-16 12:31:10,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:10,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282774865] [2020-10-16 12:31:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:11,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282774865] [2020-10-16 12:31:11,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752367489] [2020-10-16 12:31:11,008 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 [2020-10-16 12:31:11,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 12:31:11,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:11,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:31:11,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:11,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:11,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 12:31:11,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1225642591] [2020-10-16 12:31:11,080 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:11,082 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:11,086 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-16 12:31:11,086 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:11,093 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:11,093 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:11,113 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10858#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-16 12:31:11,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:31:11,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:11,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:31:11,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:31:11,114 INFO L87 Difference]: Start difference. First operand 65 states and 162 transitions. Second operand 17 states. [2020-10-16 12:31:11,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:11,653 INFO L93 Difference]: Finished difference Result 87 states and 208 transitions. [2020-10-16 12:31:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:11,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 12:31:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:11,655 INFO L225 Difference]: With dead ends: 87 [2020-10-16 12:31:11,655 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 12:31:11,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 12:31:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 12:31:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-10-16 12:31:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 12:31:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 168 transitions. [2020-10-16 12:31:11,659 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 168 transitions. Word has length 20 [2020-10-16 12:31:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:11,659 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 168 transitions. [2020-10-16 12:31:11,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:31:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 168 transitions. [2020-10-16 12:31:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 12:31:11,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:11,660 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:11,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:11,871 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:11,871 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 40 times [2020-10-16 12:31:11,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:11,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395901826] [2020-10-16 12:31:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:11,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395901826] [2020-10-16 12:31:11,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690342574] [2020-10-16 12:31:11,979 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 [2020-10-16 12:31:12,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:12,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:12,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:31:12,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:12,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:12,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 12:31:12,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [889337720] [2020-10-16 12:31:12,043 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:12,046 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:12,049 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-16 12:31:12,050 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:12,057 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:12,057 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:12,077 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11195#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-16 12:31:12,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:31:12,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:12,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:31:12,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:31:12,078 INFO L87 Difference]: Start difference. First operand 67 states and 168 transitions. Second operand 17 states. [2020-10-16 12:31:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:12,691 INFO L93 Difference]: Finished difference Result 87 states and 211 transitions. [2020-10-16 12:31:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:12,692 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 12:31:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:12,693 INFO L225 Difference]: With dead ends: 87 [2020-10-16 12:31:12,693 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 12:31:12,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=456, Invalid=1104, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 12:31:12,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 12:31:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-10-16 12:31:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 12:31:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 176 transitions. [2020-10-16 12:31:12,697 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 176 transitions. Word has length 20 [2020-10-16 12:31:12,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:12,697 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 176 transitions. [2020-10-16 12:31:12,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:31:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 176 transitions. [2020-10-16 12:31:12,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 12:31:12,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:12,698 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:12,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:12,909 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:12,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:12,909 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 41 times [2020-10-16 12:31:12,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:12,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103591632] [2020-10-16 12:31:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:13,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103591632] [2020-10-16 12:31:13,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322642543] [2020-10-16 12:31:13,021 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 [2020-10-16 12:31:13,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 12:31:13,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:13,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:31:13,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:13,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:13,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 12:31:13,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2092057986] [2020-10-16 12:31:13,088 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:13,090 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:13,093 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-16 12:31:13,093 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:13,101 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:13,101 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:13,122 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11540#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-16 12:31:13,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:31:13,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:13,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:31:13,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:31:13,123 INFO L87 Difference]: Start difference. First operand 69 states and 176 transitions. Second operand 17 states. [2020-10-16 12:31:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:13,759 INFO L93 Difference]: Finished difference Result 87 states and 219 transitions. [2020-10-16 12:31:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 12:31:13,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 12:31:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:13,761 INFO L225 Difference]: With dead ends: 87 [2020-10-16 12:31:13,761 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 12:31:13,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=1182, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 12:31:13,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 12:31:13,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-10-16 12:31:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 12:31:13,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-16 12:31:13,764 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 20 [2020-10-16 12:31:13,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:13,764 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-16 12:31:13,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:31:13,765 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-16 12:31:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:13,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:13,765 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:13,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:13,973 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:13,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:13,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 42 times [2020-10-16 12:31:13,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:13,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782829532] [2020-10-16 12:31:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:14,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782829532] [2020-10-16 12:31:14,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266031415] [2020-10-16 12:31:14,140 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 [2020-10-16 12:31:14,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 12:31:14,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:14,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:14,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:14,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:14,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:14,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [235633951] [2020-10-16 12:31:14,235 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:14,238 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:14,245 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2020-10-16 12:31:14,246 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:14,249 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:14,249 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:14,271 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:14,271 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:14,294 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:14,294 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:14,307 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:14,307 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:14,314 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11863#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-16 12:31:14,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:14,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:14,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:14,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:14,315 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 18 states. [2020-10-16 12:31:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:14,695 INFO L93 Difference]: Finished difference Result 84 states and 196 transitions. [2020-10-16 12:31:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:31:14,695 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:14,696 INFO L225 Difference]: With dead ends: 84 [2020-10-16 12:31:14,696 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 12:31:14,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=304, Invalid=752, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 12:31:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 12:31:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-16 12:31:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 12:31:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-16 12:31:14,699 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 21 [2020-10-16 12:31:14,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:14,699 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-16 12:31:14,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-16 12:31:14,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:14,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:14,700 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:14,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 12:31:14,901 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:14,901 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 43 times [2020-10-16 12:31:14,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:14,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486659784] [2020-10-16 12:31:14,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:15,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486659784] [2020-10-16 12:31:15,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901027132] [2020-10-16 12:31:15,073 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 [2020-10-16 12:31:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:15,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:15,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:15,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:15,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:15,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [270752434] [2020-10-16 12:31:15,137 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:15,139 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:15,143 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-16 12:31:15,143 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:15,144 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:15,144 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:15,175 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12179#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-16 12:31:15,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:15,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:15,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:15,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:15,176 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 18 states. [2020-10-16 12:31:15,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:15,618 INFO L93 Difference]: Finished difference Result 112 states and 254 transitions. [2020-10-16 12:31:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:15,619 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:15,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:15,620 INFO L225 Difference]: With dead ends: 112 [2020-10-16 12:31:15,620 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 12:31:15,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 12:31:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 12:31:15,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2020-10-16 12:31:15,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 12:31:15,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 158 transitions. [2020-10-16 12:31:15,624 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 158 transitions. Word has length 21 [2020-10-16 12:31:15,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:15,625 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 158 transitions. [2020-10-16 12:31:15,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:15,625 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 158 transitions. [2020-10-16 12:31:15,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:15,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:15,625 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:15,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:15,835 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:15,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:15,835 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 44 times [2020-10-16 12:31:15,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:15,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777818448] [2020-10-16 12:31:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:16,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777818448] [2020-10-16 12:31:16,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342967588] [2020-10-16 12:31:16,006 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 [2020-10-16 12:31:16,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:16,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:16,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:16,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:16,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:16,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:16,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [929737478] [2020-10-16 12:31:16,092 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:16,094 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:16,097 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-16 12:31:16,097 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:16,099 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:16,099 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:16,127 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12535#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:31:16,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:16,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:16,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:16,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:16,128 INFO L87 Difference]: Start difference. First operand 64 states and 158 transitions. Second operand 18 states. [2020-10-16 12:31:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:16,641 INFO L93 Difference]: Finished difference Result 109 states and 250 transitions. [2020-10-16 12:31:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:16,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:16,642 INFO L225 Difference]: With dead ends: 109 [2020-10-16 12:31:16,643 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 12:31:16,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 12:31:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 12:31:16,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 66. [2020-10-16 12:31:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 12:31:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 164 transitions. [2020-10-16 12:31:16,648 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 164 transitions. Word has length 21 [2020-10-16 12:31:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:16,648 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 164 transitions. [2020-10-16 12:31:16,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 164 transitions. [2020-10-16 12:31:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:16,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:16,649 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:16,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:16,859 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:16,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:16,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 45 times [2020-10-16 12:31:16,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:16,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760800946] [2020-10-16 12:31:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:16,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760800946] [2020-10-16 12:31:16,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392806465] [2020-10-16 12:31:16,992 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 [2020-10-16 12:31:17,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 12:31:17,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:17,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:17,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:17,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:17,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:17,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1924528124] [2020-10-16 12:31:17,066 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:17,068 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:17,072 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-16 12:31:17,072 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:17,081 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:17,081 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:17,101 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12896#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:31:17,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:17,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:17,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:17,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:17,102 INFO L87 Difference]: Start difference. First operand 66 states and 164 transitions. Second operand 18 states. [2020-10-16 12:31:17,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:17,682 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-10-16 12:31:17,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:17,682 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:17,683 INFO L225 Difference]: With dead ends: 107 [2020-10-16 12:31:17,683 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 12:31:17,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 12:31:17,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 12:31:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-10-16 12:31:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 12:31:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 170 transitions. [2020-10-16 12:31:17,687 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 170 transitions. Word has length 21 [2020-10-16 12:31:17,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:17,688 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 170 transitions. [2020-10-16 12:31:17,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:17,688 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 170 transitions. [2020-10-16 12:31:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:17,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:17,689 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:17,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-16 12:31:17,897 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:17,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:17,898 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 46 times [2020-10-16 12:31:17,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:17,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951278904] [2020-10-16 12:31:17,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:18,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951278904] [2020-10-16 12:31:18,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909168688] [2020-10-16 12:31:18,037 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 [2020-10-16 12:31:18,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:18,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:18,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:18,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:18,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:18,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:18,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [799506365] [2020-10-16 12:31:18,100 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:18,102 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:18,106 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-16 12:31:18,107 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:18,108 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:18,108 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:18,136 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13263#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:31:18,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:18,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:18,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:18,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:18,137 INFO L87 Difference]: Start difference. First operand 68 states and 170 transitions. Second operand 18 states. [2020-10-16 12:31:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:18,783 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 12:31:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:31:18,784 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:18,785 INFO L225 Difference]: With dead ends: 105 [2020-10-16 12:31:18,785 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 12:31:18,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=510, Invalid=1296, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 12:31:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 12:31:18,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-10-16 12:31:18,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 12:31:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 176 transitions. [2020-10-16 12:31:18,789 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 176 transitions. Word has length 21 [2020-10-16 12:31:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:18,789 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 176 transitions. [2020-10-16 12:31:18,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 176 transitions. [2020-10-16 12:31:18,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:18,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:18,790 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:19,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 12:31:19,002 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:19,002 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 47 times [2020-10-16 12:31:19,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:19,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578340359] [2020-10-16 12:31:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:19,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578340359] [2020-10-16 12:31:19,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238599500] [2020-10-16 12:31:19,143 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 [2020-10-16 12:31:19,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 12:31:19,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:19,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:19,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:19,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:19,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:19,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1156625071] [2020-10-16 12:31:19,216 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:19,218 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:19,222 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-16 12:31:19,223 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:19,235 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:19,235 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:19,254 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13636#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-16 12:31:19,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:19,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:19,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:19,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:19,255 INFO L87 Difference]: Start difference. First operand 70 states and 176 transitions. Second operand 18 states. [2020-10-16 12:31:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:19,969 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2020-10-16 12:31:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:31:19,969 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:19,970 INFO L225 Difference]: With dead ends: 105 [2020-10-16 12:31:19,970 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 12:31:19,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=593, Invalid=1387, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 12:31:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 12:31:19,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2020-10-16 12:31:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 12:31:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 184 transitions. [2020-10-16 12:31:19,974 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 184 transitions. Word has length 21 [2020-10-16 12:31:19,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:19,974 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 184 transitions. [2020-10-16 12:31:19,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 184 transitions. [2020-10-16 12:31:19,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:31:19,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:19,975 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:20,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 12:31:20,176 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:20,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:20,176 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 48 times [2020-10-16 12:31:20,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:20,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968147436] [2020-10-16 12:31:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:20,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968147436] [2020-10-16 12:31:20,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366024889] [2020-10-16 12:31:20,310 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 [2020-10-16 12:31:20,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 12:31:20,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:20,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 12:31:20,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:20,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:20,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 12:31:20,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [462698709] [2020-10-16 12:31:20,380 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:20,382 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:20,386 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-16 12:31:20,386 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:20,390 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:20,390 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:20,422 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14017#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-16 12:31:20,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:31:20,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:20,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:31:20,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:31:20,423 INFO L87 Difference]: Start difference. First operand 72 states and 184 transitions. Second operand 18 states. [2020-10-16 12:31:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:21,192 INFO L93 Difference]: Finished difference Result 106 states and 259 transitions. [2020-10-16 12:31:21,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 12:31:21,192 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 12:31:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:21,193 INFO L225 Difference]: With dead ends: 106 [2020-10-16 12:31:21,194 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 12:31:21,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=690, Invalid=1472, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 12:31:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 12:31:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2020-10-16 12:31:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 12:31:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-16 12:31:21,197 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 21 [2020-10-16 12:31:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:21,197 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-16 12:31:21,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:31:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-16 12:31:21,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:21,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:21,198 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:21,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:21,399 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:21,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 49 times [2020-10-16 12:31:21,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:21,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643406264] [2020-10-16 12:31:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:21,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643406264] [2020-10-16 12:31:21,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213702906] [2020-10-16 12:31:21,597 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 [2020-10-16 12:31:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:21,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:21,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:21,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:21,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:21,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [93555790] [2020-10-16 12:31:21,657 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:21,660 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:21,664 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 38 transitions. [2020-10-16 12:31:21,664 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:21,666 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:21,666 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:21,701 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14379#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:31:21,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:21,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:21,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:21,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:21,702 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 19 states. [2020-10-16 12:31:22,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:22,125 INFO L93 Difference]: Finished difference Result 102 states and 234 transitions. [2020-10-16 12:31:22,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:31:22,126 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:22,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:22,127 INFO L225 Difference]: With dead ends: 102 [2020-10-16 12:31:22,127 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 12:31:22,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 12:31:22,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 12:31:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2020-10-16 12:31:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 12:31:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 160 transitions. [2020-10-16 12:31:22,131 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 160 transitions. Word has length 22 [2020-10-16 12:31:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:22,131 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 160 transitions. [2020-10-16 12:31:22,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 160 transitions. [2020-10-16 12:31:22,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:22,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:22,132 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:22,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:22,342 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:22,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 50 times [2020-10-16 12:31:22,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:22,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518503372] [2020-10-16 12:31:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:22,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518503372] [2020-10-16 12:31:22,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230197977] [2020-10-16 12:31:22,519 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 [2020-10-16 12:31:22,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:22,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:22,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:22,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:22,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:22,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:22,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1280977462] [2020-10-16 12:31:22,586 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:22,588 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:22,592 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-16 12:31:22,592 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:22,595 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:22,595 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:22,630 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14727#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:31:22,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:22,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:22,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:22,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:22,630 INFO L87 Difference]: Start difference. First operand 65 states and 160 transitions. Second operand 19 states. [2020-10-16 12:31:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:23,125 INFO L93 Difference]: Finished difference Result 99 states and 230 transitions. [2020-10-16 12:31:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:23,126 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:23,127 INFO L225 Difference]: With dead ends: 99 [2020-10-16 12:31:23,127 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 12:31:23,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=367, Invalid=1039, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 12:31:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 12:31:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2020-10-16 12:31:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 12:31:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2020-10-16 12:31:23,131 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 22 [2020-10-16 12:31:23,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:23,131 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2020-10-16 12:31:23,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:23,131 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2020-10-16 12:31:23,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:23,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:23,132 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:23,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:23,342 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:23,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:23,342 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 51 times [2020-10-16 12:31:23,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:23,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446837371] [2020-10-16 12:31:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:23,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446837371] [2020-10-16 12:31:23,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440123810] [2020-10-16 12:31:23,568 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 [2020-10-16 12:31:23,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 12:31:23,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:23,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:23,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:23,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:23,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:23,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1302505284] [2020-10-16 12:31:23,671 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:23,675 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:23,681 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-16 12:31:23,682 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:23,696 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:23,696 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:23,725 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15080#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:31:23,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:23,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:23,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:23,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:23,726 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand 19 states. [2020-10-16 12:31:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:24,313 INFO L93 Difference]: Finished difference Result 97 states and 228 transitions. [2020-10-16 12:31:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:24,314 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:24,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:24,315 INFO L225 Difference]: With dead ends: 97 [2020-10-16 12:31:24,315 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 12:31:24,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 12:31:24,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 12:31:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2020-10-16 12:31:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 12:31:24,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2020-10-16 12:31:24,318 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 22 [2020-10-16 12:31:24,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:24,318 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2020-10-16 12:31:24,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:24,318 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2020-10-16 12:31:24,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:24,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:24,319 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:24,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:24,520 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:24,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 52 times [2020-10-16 12:31:24,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:24,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579821430] [2020-10-16 12:31:24,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:24,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579821430] [2020-10-16 12:31:24,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118154032] [2020-10-16 12:31:24,687 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:24,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:24,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:24,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:24,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:24,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:24,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [193329430] [2020-10-16 12:31:24,756 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:24,758 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:24,762 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-16 12:31:24,762 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:24,772 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:24,772 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:24,790 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15439#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-16 12:31:24,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:24,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:24,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:24,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:24,791 INFO L87 Difference]: Start difference. First operand 69 states and 172 transitions. Second operand 19 states. [2020-10-16 12:31:25,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:25,422 INFO L93 Difference]: Finished difference Result 95 states and 226 transitions. [2020-10-16 12:31:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:25,423 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:25,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:25,424 INFO L225 Difference]: With dead ends: 95 [2020-10-16 12:31:25,424 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 12:31:25,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 12:31:25,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 12:31:25,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2020-10-16 12:31:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 12:31:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 178 transitions. [2020-10-16 12:31:25,430 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 178 transitions. Word has length 22 [2020-10-16 12:31:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:25,430 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 178 transitions. [2020-10-16 12:31:25,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 178 transitions. [2020-10-16 12:31:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:25,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:25,431 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:25,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 12:31:25,640 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:25,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:25,640 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 53 times [2020-10-16 12:31:25,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:25,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494514] [2020-10-16 12:31:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:25,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494514] [2020-10-16 12:31:25,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455694305] [2020-10-16 12:31:25,804 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 [2020-10-16 12:31:25,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 12:31:25,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:25,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:25,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:25,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:25,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:25,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [127249678] [2020-10-16 12:31:25,894 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:25,897 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:25,901 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-16 12:31:25,901 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:25,905 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:25,905 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:25,939 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15804#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-16 12:31:25,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:25,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:25,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:25,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:25,940 INFO L87 Difference]: Start difference. First operand 71 states and 178 transitions. Second operand 19 states. [2020-10-16 12:31:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:26,643 INFO L93 Difference]: Finished difference Result 93 states and 224 transitions. [2020-10-16 12:31:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:31:26,644 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:26,645 INFO L225 Difference]: With dead ends: 93 [2020-10-16 12:31:26,645 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 12:31:26,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1369, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 12:31:26,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 12:31:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-10-16 12:31:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 12:31:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 184 transitions. [2020-10-16 12:31:26,648 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 184 transitions. Word has length 22 [2020-10-16 12:31:26,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:26,648 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 184 transitions. [2020-10-16 12:31:26,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:26,648 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 184 transitions. [2020-10-16 12:31:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:26,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:26,649 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:26,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:26,851 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:26,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:26,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 54 times [2020-10-16 12:31:26,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:26,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537125752] [2020-10-16 12:31:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:26,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537125752] [2020-10-16 12:31:26,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653412598] [2020-10-16 12:31:26,995 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 [2020-10-16 12:31:27,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 12:31:27,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:27,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:27,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:27,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:27,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:27,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1157764625] [2020-10-16 12:31:27,063 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:27,065 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:27,068 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-16 12:31:27,068 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:27,072 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:27,072 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:27,106 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16175#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-16 12:31:27,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:27,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:27,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:27,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:27,107 INFO L87 Difference]: Start difference. First operand 73 states and 184 transitions. Second operand 19 states. [2020-10-16 12:31:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:27,876 INFO L93 Difference]: Finished difference Result 93 states and 227 transitions. [2020-10-16 12:31:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:31:27,877 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:27,878 INFO L225 Difference]: With dead ends: 93 [2020-10-16 12:31:27,878 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 12:31:27,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=607, Invalid=1463, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 12:31:27,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 12:31:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2020-10-16 12:31:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 12:31:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2020-10-16 12:31:27,882 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 22 [2020-10-16 12:31:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:27,882 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2020-10-16 12:31:27,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2020-10-16 12:31:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:31:27,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:27,883 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:28,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 12:31:28,084 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 55 times [2020-10-16 12:31:28,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:28,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744328873] [2020-10-16 12:31:28,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:28,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744328873] [2020-10-16 12:31:28,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936728195] [2020-10-16 12:31:28,214 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 [2020-10-16 12:31:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:28,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:31:28,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:28,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:28,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 12:31:28,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2055402740] [2020-10-16 12:31:28,286 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:28,288 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:28,291 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-16 12:31:28,292 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:28,299 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:28,299 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:28,321 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16554#(and (<= ~i~0 26) (<= ~j~0 20))] [2020-10-16 12:31:28,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:31:28,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:28,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:31:28,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:31:28,322 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand 19 states. [2020-10-16 12:31:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:29,158 INFO L93 Difference]: Finished difference Result 93 states and 235 transitions. [2020-10-16 12:31:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 12:31:29,159 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 12:31:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:29,160 INFO L225 Difference]: With dead ends: 93 [2020-10-16 12:31:29,160 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 12:31:29,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=1551, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 12:31:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 12:31:29,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2020-10-16 12:31:29,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 12:31:29,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-16 12:31:29,162 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 22 [2020-10-16 12:31:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:29,163 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-16 12:31:29,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:31:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-16 12:31:29,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:29,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:29,163 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:29,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 12:31:29,364 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:29,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 56 times [2020-10-16 12:31:29,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:29,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876151227] [2020-10-16 12:31:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:29,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876151227] [2020-10-16 12:31:29,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720934023] [2020-10-16 12:31:29,566 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 [2020-10-16 12:31:29,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:29,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:29,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:29,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:29,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:29,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:29,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1243301542] [2020-10-16 12:31:29,627 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:29,630 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:29,635 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 43 transitions. [2020-10-16 12:31:29,636 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:29,638 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:29,638 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:29,657 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:29,658 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:29,680 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:29,680 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:29,688 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:29,688 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:29,693 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16907#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-16 12:31:29,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:29,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:29,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:29,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:29,695 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 20 states. [2020-10-16 12:31:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:30,139 INFO L93 Difference]: Finished difference Result 90 states and 210 transitions. [2020-10-16 12:31:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:30,140 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:30,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:30,141 INFO L225 Difference]: With dead ends: 90 [2020-10-16 12:31:30,141 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 12:31:30,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=947, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 12:31:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 12:31:30,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-16 12:31:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 12:31:30,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-16 12:31:30,144 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 23 [2020-10-16 12:31:30,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:30,144 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-16 12:31:30,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:30,144 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-16 12:31:30,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:30,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:30,145 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:30,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:30,354 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:30,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:30,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 57 times [2020-10-16 12:31:30,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:30,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277791201] [2020-10-16 12:31:30,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:30,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277791201] [2020-10-16 12:31:30,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288477342] [2020-10-16 12:31:30,583 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:30,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 12:31:30,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:30,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:30,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:30,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:30,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:30,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1531152392] [2020-10-16 12:31:30,658 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:30,660 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:30,665 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:30,665 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:30,675 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:30,675 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:30,696 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17249#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-16 12:31:30,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:30,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:30,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:30,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:30,697 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 20 states. [2020-10-16 12:31:31,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:31,231 INFO L93 Difference]: Finished difference Result 122 states and 276 transitions. [2020-10-16 12:31:31,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:31,231 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:31,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:31,232 INFO L225 Difference]: With dead ends: 122 [2020-10-16 12:31:31,232 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 12:31:31,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 12:31:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 12:31:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 68. [2020-10-16 12:31:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 12:31:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 168 transitions. [2020-10-16 12:31:31,235 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 168 transitions. Word has length 23 [2020-10-16 12:31:31,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:31,235 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 168 transitions. [2020-10-16 12:31:31,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:31,235 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 168 transitions. [2020-10-16 12:31:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:31,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:31,236 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:31,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 12:31:31,438 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:31,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:31,438 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 58 times [2020-10-16 12:31:31,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:31,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230004086] [2020-10-16 12:31:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:31,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230004086] [2020-10-16 12:31:31,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010620896] [2020-10-16 12:31:31,635 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 [2020-10-16 12:31:31,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:31,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:31,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:31,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:31,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:31,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:31,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [118261737] [2020-10-16 12:31:31,698 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:31,701 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:31,704 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:31,704 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:31,711 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:31,712 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:31,734 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17635#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:31:31,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:31,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:31,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:31,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:31,735 INFO L87 Difference]: Start difference. First operand 68 states and 168 transitions. Second operand 20 states. [2020-10-16 12:31:32,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:32,312 INFO L93 Difference]: Finished difference Result 119 states and 272 transitions. [2020-10-16 12:31:32,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:32,312 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:32,314 INFO L225 Difference]: With dead ends: 119 [2020-10-16 12:31:32,314 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 12:31:32,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=473, Invalid=1333, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 12:31:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 12:31:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 70. [2020-10-16 12:31:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 12:31:32,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 174 transitions. [2020-10-16 12:31:32,318 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 174 transitions. Word has length 23 [2020-10-16 12:31:32,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:32,318 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 174 transitions. [2020-10-16 12:31:32,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 174 transitions. [2020-10-16 12:31:32,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:32,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:32,319 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:32,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:32,524 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:32,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:32,524 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 59 times [2020-10-16 12:31:32,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:32,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823077596] [2020-10-16 12:31:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:32,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823077596] [2020-10-16 12:31:32,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143672256] [2020-10-16 12:31:32,687 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 [2020-10-16 12:31:32,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 12:31:32,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:32,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:32,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:32,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:32,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:32,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2146529674] [2020-10-16 12:31:32,830 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:32,835 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:32,870 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:32,871 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:32,892 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:32,892 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:32,921 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18026#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:31:32,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:32,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:32,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:32,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:32,922 INFO L87 Difference]: Start difference. First operand 70 states and 174 transitions. Second operand 20 states. [2020-10-16 12:31:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:33,727 INFO L93 Difference]: Finished difference Result 117 states and 270 transitions. [2020-10-16 12:31:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:31:33,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:33,729 INFO L225 Difference]: With dead ends: 117 [2020-10-16 12:31:33,729 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 12:31:33,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1458, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 12:31:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 12:31:33,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2020-10-16 12:31:33,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 12:31:33,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 180 transitions. [2020-10-16 12:31:33,734 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 180 transitions. Word has length 23 [2020-10-16 12:31:33,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:33,734 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 180 transitions. [2020-10-16 12:31:33,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:33,735 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 180 transitions. [2020-10-16 12:31:33,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:33,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:33,736 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:33,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-16 12:31:33,948 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:33,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:33,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 60 times [2020-10-16 12:31:33,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:33,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534345179] [2020-10-16 12:31:33,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:34,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534345179] [2020-10-16 12:31:34,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7061465] [2020-10-16 12:31:34,205 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 [2020-10-16 12:31:34,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 12:31:34,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:34,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:34,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:34,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:34,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:34,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [251779275] [2020-10-16 12:31:34,342 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:34,345 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:34,350 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:34,351 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:34,352 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:34,352 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:34,383 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18423#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:31:34,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:34,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:34,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:34,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:34,384 INFO L87 Difference]: Start difference. First operand 72 states and 180 transitions. Second operand 20 states. [2020-10-16 12:31:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:35,073 INFO L93 Difference]: Finished difference Result 115 states and 268 transitions. [2020-10-16 12:31:35,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:31:35,078 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:35,079 INFO L225 Difference]: With dead ends: 115 [2020-10-16 12:31:35,079 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 12:31:35,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=587, Invalid=1575, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 12:31:35,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 12:31:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2020-10-16 12:31:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 12:31:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 186 transitions. [2020-10-16 12:31:35,082 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 186 transitions. Word has length 23 [2020-10-16 12:31:35,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:35,082 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 186 transitions. [2020-10-16 12:31:35,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 186 transitions. [2020-10-16 12:31:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:35,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:35,082 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:35,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:35,284 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:35,284 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 61 times [2020-10-16 12:31:35,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:35,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247103256] [2020-10-16 12:31:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:35,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247103256] [2020-10-16 12:31:35,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035657459] [2020-10-16 12:31:35,446 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 [2020-10-16 12:31:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:35,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:35,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:35,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:35,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:35,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [634399645] [2020-10-16 12:31:35,531 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:35,534 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:35,540 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:35,540 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:35,550 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:35,550 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:35,573 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18826#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-16 12:31:35,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:35,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:35,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:35,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:35,574 INFO L87 Difference]: Start difference. First operand 74 states and 186 transitions. Second operand 20 states. [2020-10-16 12:31:36,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:36,295 INFO L93 Difference]: Finished difference Result 113 states and 266 transitions. [2020-10-16 12:31:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:31:36,295 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:36,297 INFO L225 Difference]: With dead ends: 113 [2020-10-16 12:31:36,297 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 12:31:36,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=1684, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 12:31:36,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 12:31:36,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 76. [2020-10-16 12:31:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 12:31:36,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 192 transitions. [2020-10-16 12:31:36,300 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 192 transitions. Word has length 23 [2020-10-16 12:31:36,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:36,300 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 192 transitions. [2020-10-16 12:31:36,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:36,300 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 192 transitions. [2020-10-16 12:31:36,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:36,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:36,301 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:36,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-16 12:31:36,502 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:36,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:36,502 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 62 times [2020-10-16 12:31:36,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:36,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862690293] [2020-10-16 12:31:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:36,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862690293] [2020-10-16 12:31:36,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875547514] [2020-10-16 12:31:36,661 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 [2020-10-16 12:31:36,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:36,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:36,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:36,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:36,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:36,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:36,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1759189603] [2020-10-16 12:31:36,732 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:36,734 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:36,739 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:36,739 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:36,749 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:36,749 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:36,770 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19235#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-16 12:31:36,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:36,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:36,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:36,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:36,771 INFO L87 Difference]: Start difference. First operand 76 states and 192 transitions. Second operand 20 states. [2020-10-16 12:31:37,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:37,642 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-16 12:31:37,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:31:37,643 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:37,644 INFO L225 Difference]: With dead ends: 113 [2020-10-16 12:31:37,644 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 12:31:37,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=765, Invalid=1785, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 12:31:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 12:31:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2020-10-16 12:31:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 12:31:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 200 transitions. [2020-10-16 12:31:37,647 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 200 transitions. Word has length 23 [2020-10-16 12:31:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:37,648 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 200 transitions. [2020-10-16 12:31:37,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 200 transitions. [2020-10-16 12:31:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:31:37,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:37,648 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:37,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:37,850 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 63 times [2020-10-16 12:31:37,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:37,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493785776] [2020-10-16 12:31:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:38,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493785776] [2020-10-16 12:31:38,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114962008] [2020-10-16 12:31:38,016 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 [2020-10-16 12:31:38,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 12:31:38,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:38,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 12:31:38,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:38,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:38,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 12:31:38,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1257449218] [2020-10-16 12:31:38,096 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:38,098 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:38,103 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-16 12:31:38,103 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:38,110 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:38,110 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:38,131 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19652#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-16 12:31:38,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:31:38,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:38,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:31:38,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:31:38,132 INFO L87 Difference]: Start difference. First operand 78 states and 200 transitions. Second operand 20 states. [2020-10-16 12:31:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:39,055 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-16 12:31:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 12:31:39,056 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:31:39,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:39,057 INFO L225 Difference]: With dead ends: 114 [2020-10-16 12:31:39,057 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 12:31:39,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=876, Invalid=1880, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 12:31:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 12:31:39,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2020-10-16 12:31:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 12:31:39,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-16 12:31:39,060 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 23 [2020-10-16 12:31:39,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:39,060 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-16 12:31:39,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:31:39,060 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-16 12:31:39,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:39,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:39,061 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:39,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-16 12:31:39,262 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:39,262 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 64 times [2020-10-16 12:31:39,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:39,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4393576] [2020-10-16 12:31:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:39,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4393576] [2020-10-16 12:31:39,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919142856] [2020-10-16 12:31:39,514 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 [2020-10-16 12:31:39,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:39,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:39,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:39,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:39,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:39,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:39,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2059689482] [2020-10-16 12:31:39,632 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:39,637 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:39,645 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 40 transitions. [2020-10-16 12:31:39,646 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:39,660 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:39,660 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:39,693 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20046#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:31:39,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:39,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:39,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:39,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:39,695 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 21 states. [2020-10-16 12:31:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:40,269 INFO L93 Difference]: Finished difference Result 110 states and 252 transitions. [2020-10-16 12:31:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:31:40,270 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:40,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:40,271 INFO L225 Difference]: With dead ends: 110 [2020-10-16 12:31:40,271 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 12:31:40,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 12:31:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 12:31:40,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 69. [2020-10-16 12:31:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 12:31:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 170 transitions. [2020-10-16 12:31:40,275 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 170 transitions. Word has length 24 [2020-10-16 12:31:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:40,276 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 170 transitions. [2020-10-16 12:31:40,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 170 transitions. [2020-10-16 12:31:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:40,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:40,277 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:40,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:40,488 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:40,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:40,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 65 times [2020-10-16 12:31:40,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:40,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906678717] [2020-10-16 12:31:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:40,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906678717] [2020-10-16 12:31:40,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956556617] [2020-10-16 12:31:40,705 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 [2020-10-16 12:31:40,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 12:31:40,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:40,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:40,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:40,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:40,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:40,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1842468401] [2020-10-16 12:31:40,779 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:40,793 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:40,822 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:40,822 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:40,823 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:40,823 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:40,856 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20422#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:31:40,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:40,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:40,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:40,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:40,857 INFO L87 Difference]: Start difference. First operand 69 states and 170 transitions. Second operand 21 states. [2020-10-16 12:31:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:41,415 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-10-16 12:31:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:41,415 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:41,417 INFO L225 Difference]: With dead ends: 107 [2020-10-16 12:31:41,417 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 12:31:41,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=450, Invalid=1272, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 12:31:41,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 12:31:41,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2020-10-16 12:31:41,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 12:31:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 176 transitions. [2020-10-16 12:31:41,420 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 176 transitions. Word has length 24 [2020-10-16 12:31:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:41,420 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 176 transitions. [2020-10-16 12:31:41,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:41,420 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 176 transitions. [2020-10-16 12:31:41,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:41,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:41,420 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:41,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-16 12:31:41,621 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:41,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:41,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 66 times [2020-10-16 12:31:41,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:41,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337010991] [2020-10-16 12:31:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:41,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337010991] [2020-10-16 12:31:41,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483916924] [2020-10-16 12:31:41,839 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 [2020-10-16 12:31:41,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 12:31:41,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:41,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:41,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:41,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:41,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:41,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1967573994] [2020-10-16 12:31:41,912 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:41,915 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:41,920 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:41,920 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:41,924 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:41,924 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:41,958 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20803#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:31:41,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:41,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:41,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:41,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:41,959 INFO L87 Difference]: Start difference. First operand 71 states and 176 transitions. Second operand 21 states. [2020-10-16 12:31:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:42,606 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 12:31:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:42,607 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:42,608 INFO L225 Difference]: With dead ends: 105 [2020-10-16 12:31:42,608 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 12:31:42,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 12:31:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 12:31:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 73. [2020-10-16 12:31:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 12:31:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2020-10-16 12:31:42,612 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 24 [2020-10-16 12:31:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:42,612 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2020-10-16 12:31:42,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2020-10-16 12:31:42,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:42,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:42,613 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:42,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-16 12:31:42,819 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:42,820 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 67 times [2020-10-16 12:31:42,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:42,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717368091] [2020-10-16 12:31:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:43,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717368091] [2020-10-16 12:31:43,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181548547] [2020-10-16 12:31:43,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:43,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:43,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:43,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:43,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:43,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [74604659] [2020-10-16 12:31:43,148 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:43,153 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:43,160 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:43,161 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:43,172 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:43,173 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:43,207 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21190#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-16 12:31:43,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:43,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:43,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:43,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:43,209 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand 21 states. [2020-10-16 12:31:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:44,169 INFO L93 Difference]: Finished difference Result 103 states and 244 transitions. [2020-10-16 12:31:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:31:44,170 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:44,171 INFO L225 Difference]: With dead ends: 103 [2020-10-16 12:31:44,171 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 12:31:44,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=534, Invalid=1536, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 12:31:44,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 12:31:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2020-10-16 12:31:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 12:31:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 188 transitions. [2020-10-16 12:31:44,175 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 188 transitions. Word has length 24 [2020-10-16 12:31:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:44,175 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 188 transitions. [2020-10-16 12:31:44,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 188 transitions. [2020-10-16 12:31:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:44,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:44,176 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:44,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-16 12:31:44,385 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:44,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 68 times [2020-10-16 12:31:44,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:44,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180339404] [2020-10-16 12:31:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:44,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180339404] [2020-10-16 12:31:44,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202807904] [2020-10-16 12:31:44,577 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 [2020-10-16 12:31:44,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:44,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:44,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:44,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:44,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:44,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [947412971] [2020-10-16 12:31:44,649 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:44,652 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:44,657 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:44,658 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:44,668 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:44,668 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:44,700 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21583#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-16 12:31:44,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:44,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:44,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:44,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:44,701 INFO L87 Difference]: Start difference. First operand 75 states and 188 transitions. Second operand 21 states. [2020-10-16 12:31:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:45,490 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2020-10-16 12:31:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:31:45,491 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:45,492 INFO L225 Difference]: With dead ends: 101 [2020-10-16 12:31:45,492 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 12:31:45,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 12:31:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 12:31:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2020-10-16 12:31:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 12:31:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 194 transitions. [2020-10-16 12:31:45,495 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 194 transitions. Word has length 24 [2020-10-16 12:31:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:45,496 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 194 transitions. [2020-10-16 12:31:45,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 194 transitions. [2020-10-16 12:31:45,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:45,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:45,496 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:45,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:45,697 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:45,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:45,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 69 times [2020-10-16 12:31:45,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:45,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287081227] [2020-10-16 12:31:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:45,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287081227] [2020-10-16 12:31:45,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878635611] [2020-10-16 12:31:45,878 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 [2020-10-16 12:31:45,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 12:31:45,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:45,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:45,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:45,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:45,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1531629548] [2020-10-16 12:31:45,954 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:45,955 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:45,960 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:45,960 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:45,973 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:45,973 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:46,010 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21982#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-16 12:31:46,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:46,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:46,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:46,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:46,012 INFO L87 Difference]: Start difference. First operand 77 states and 194 transitions. Second operand 21 states. [2020-10-16 12:31:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:46,901 INFO L93 Difference]: Finished difference Result 99 states and 240 transitions. [2020-10-16 12:31:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:31:46,901 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:46,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:46,903 INFO L225 Difference]: With dead ends: 99 [2020-10-16 12:31:46,903 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 12:31:46,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=682, Invalid=1768, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 12:31:46,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 12:31:46,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2020-10-16 12:31:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 12:31:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 200 transitions. [2020-10-16 12:31:46,906 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 200 transitions. Word has length 24 [2020-10-16 12:31:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:46,906 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 200 transitions. [2020-10-16 12:31:46,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 200 transitions. [2020-10-16 12:31:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:46,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:46,906 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:47,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:47,107 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:47,108 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 70 times [2020-10-16 12:31:47,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:47,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011241964] [2020-10-16 12:31:47,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:47,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011241964] [2020-10-16 12:31:47,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217375177] [2020-10-16 12:31:47,274 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 [2020-10-16 12:31:47,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:47,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:47,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:47,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:47,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:47,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:47,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1966481805] [2020-10-16 12:31:47,373 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:47,378 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:47,385 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:47,386 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:47,389 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:47,390 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:47,425 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22387#(and (<= ~i~0 26) (<= ~j~0 20))] [2020-10-16 12:31:47,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:47,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:47,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:47,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:47,427 INFO L87 Difference]: Start difference. First operand 79 states and 200 transitions. Second operand 21 states. [2020-10-16 12:31:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:48,328 INFO L93 Difference]: Finished difference Result 99 states and 243 transitions. [2020-10-16 12:31:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:31:48,329 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:48,329 INFO L225 Difference]: With dead ends: 99 [2020-10-16 12:31:48,330 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 12:31:48,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=1872, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 12:31:48,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 12:31:48,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2020-10-16 12:31:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 12:31:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 208 transitions. [2020-10-16 12:31:48,334 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 208 transitions. Word has length 24 [2020-10-16 12:31:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:48,335 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 208 transitions. [2020-10-16 12:31:48,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 208 transitions. [2020-10-16 12:31:48,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:31:48,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:48,335 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:48,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:48,536 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 71 times [2020-10-16 12:31:48,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:48,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125108510] [2020-10-16 12:31:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:48,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125108510] [2020-10-16 12:31:48,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712246973] [2020-10-16 12:31:48,726 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 [2020-10-16 12:31:48,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 12:31:48,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:48,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:31:48,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:48,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:48,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 12:31:48,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [166551133] [2020-10-16 12:31:48,798 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:48,800 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:48,804 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-16 12:31:48,805 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:48,805 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:48,805 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:48,839 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22800#(and (<= ~i~0 26) (<= ~j~0 22))] [2020-10-16 12:31:48,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:31:48,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:48,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:31:48,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:48,841 INFO L87 Difference]: Start difference. First operand 81 states and 208 transitions. Second operand 21 states. [2020-10-16 12:31:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:49,852 INFO L93 Difference]: Finished difference Result 99 states and 251 transitions. [2020-10-16 12:31:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 12:31:49,853 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 12:31:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:49,854 INFO L225 Difference]: With dead ends: 99 [2020-10-16 12:31:49,854 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 12:31:49,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=892, Invalid=1970, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 12:31:49,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 12:31:49,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2020-10-16 12:31:49,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 12:31:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-16 12:31:49,857 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 24 [2020-10-16 12:31:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:49,857 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-16 12:31:49,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:31:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-16 12:31:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:49,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:49,858 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:50,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-16 12:31:50,059 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:50,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:50,059 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 72 times [2020-10-16 12:31:50,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:50,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522421798] [2020-10-16 12:31:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:50,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522421798] [2020-10-16 12:31:50,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921979272] [2020-10-16 12:31:50,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:50,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 12:31:50,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:50,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:31:50,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:50,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:50,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:31:50,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1550603840] [2020-10-16 12:31:50,406 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:50,408 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:50,415 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 45 transitions. [2020-10-16 12:31:50,415 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:50,419 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:50,420 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:50,445 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:50,445 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:50,467 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:50,467 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:50,473 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:50,474 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:50,485 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23183#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-16 12:31:50,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:31:50,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:50,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:31:50,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:31:50,486 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 22 states. [2020-10-16 12:31:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:50,996 INFO L93 Difference]: Finished difference Result 96 states and 224 transitions. [2020-10-16 12:31:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:31:50,997 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:31:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:50,998 INFO L225 Difference]: With dead ends: 96 [2020-10-16 12:31:50,998 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 12:31:50,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=476, Invalid=1164, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 12:31:50,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 12:31:51,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-16 12:31:51,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 12:31:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-10-16 12:31:51,002 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 25 [2020-10-16 12:31:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:51,002 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-10-16 12:31:51,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:31:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-10-16 12:31:51,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:51,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:51,003 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:51,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:51,205 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:51,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 73 times [2020-10-16 12:31:51,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:51,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778144687] [2020-10-16 12:31:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:51,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778144687] [2020-10-16 12:31:51,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917726595] [2020-10-16 12:31:51,471 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:51,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:31:51,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:51,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:51,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:31:51,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2070614018] [2020-10-16 12:31:51,540 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:51,543 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:51,548 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:31:51,549 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:51,558 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:51,558 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:51,583 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23551#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-16 12:31:51,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:31:51,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:51,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:31:51,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:31:51,584 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 22 states. [2020-10-16 12:31:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:52,222 INFO L93 Difference]: Finished difference Result 132 states and 298 transitions. [2020-10-16 12:31:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:31:52,223 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:31:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:52,224 INFO L225 Difference]: With dead ends: 132 [2020-10-16 12:31:52,224 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 12:31:52,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=533, Invalid=1447, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 12:31:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 12:31:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2020-10-16 12:31:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 12:31:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 178 transitions. [2020-10-16 12:31:52,228 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 178 transitions. Word has length 25 [2020-10-16 12:31:52,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:52,228 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 178 transitions. [2020-10-16 12:31:52,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:31:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 178 transitions. [2020-10-16 12:31:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:52,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:52,229 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:52,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:52,433 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 74 times [2020-10-16 12:31:52,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:52,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634913459] [2020-10-16 12:31:52,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:52,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634913459] [2020-10-16 12:31:52,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196724400] [2020-10-16 12:31:52,677 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 [2020-10-16 12:31:52,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:31:52,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:31:52,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:52,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:52,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:31:52,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1445312170] [2020-10-16 12:31:52,746 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:52,748 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:52,752 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:31:52,753 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:52,762 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:52,762 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:52,788 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23967#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:31:52,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:31:52,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:52,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:31:52,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:31:52,789 INFO L87 Difference]: Start difference. First operand 72 states and 178 transitions. Second operand 22 states. [2020-10-16 12:31:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:53,487 INFO L93 Difference]: Finished difference Result 129 states and 294 transitions. [2020-10-16 12:31:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:31:53,488 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:31:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:53,489 INFO L225 Difference]: With dead ends: 129 [2020-10-16 12:31:53,489 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 12:31:53,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=564, Invalid=1598, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 12:31:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 12:31:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2020-10-16 12:31:53,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 12:31:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2020-10-16 12:31:53,492 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 25 [2020-10-16 12:31:53,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:53,492 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2020-10-16 12:31:53,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:31:53,492 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2020-10-16 12:31:53,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:53,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:53,492 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:53,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:53,693 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:53,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:53,694 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 75 times [2020-10-16 12:31:53,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:53,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956108036] [2020-10-16 12:31:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:53,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956108036] [2020-10-16 12:31:53,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014553314] [2020-10-16 12:31:53,931 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 [2020-10-16 12:31:53,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 12:31:53,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:53,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:31:53,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:54,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:54,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:31:54,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [330034234] [2020-10-16 12:31:54,000 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:54,003 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:54,009 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:31:54,009 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:54,017 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:54,018 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:54,040 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24388#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:31:54,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:31:54,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:54,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:31:54,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:31:54,042 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand 22 states. [2020-10-16 12:31:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:54,811 INFO L93 Difference]: Finished difference Result 127 states and 292 transitions. [2020-10-16 12:31:54,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:31:54,812 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:31:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:54,813 INFO L225 Difference]: With dead ends: 127 [2020-10-16 12:31:54,813 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 12:31:54,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=611, Invalid=1741, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 12:31:54,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 12:31:54,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2020-10-16 12:31:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 12:31:54,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 190 transitions. [2020-10-16 12:31:54,816 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 190 transitions. Word has length 25 [2020-10-16 12:31:54,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:54,816 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 190 transitions. [2020-10-16 12:31:54,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:31:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 190 transitions. [2020-10-16 12:31:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:54,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:54,820 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:55,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-16 12:31:55,024 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:55,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:55,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 76 times [2020-10-16 12:31:55,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:55,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225730181] [2020-10-16 12:31:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:55,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225730181] [2020-10-16 12:31:55,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200000580] [2020-10-16 12:31:55,251 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 [2020-10-16 12:31:55,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:31:55,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:55,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:31:55,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:55,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:55,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:31:55,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2116322402] [2020-10-16 12:31:55,316 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:55,318 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:55,322 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:31:55,323 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:55,323 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:55,324 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:55,357 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24815#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:31:55,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:31:55,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:55,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:31:55,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:31:55,358 INFO L87 Difference]: Start difference. First operand 76 states and 190 transitions. Second operand 22 states. [2020-10-16 12:31:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:56,203 INFO L93 Difference]: Finished difference Result 125 states and 290 transitions. [2020-10-16 12:31:56,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:31:56,204 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:31:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:56,205 INFO L225 Difference]: With dead ends: 125 [2020-10-16 12:31:56,205 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 12:31:56,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 12:31:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 12:31:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2020-10-16 12:31:56,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 12:31:56,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 196 transitions. [2020-10-16 12:31:56,209 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 196 transitions. Word has length 25 [2020-10-16 12:31:56,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:56,209 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 196 transitions. [2020-10-16 12:31:56,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:31:56,209 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 196 transitions. [2020-10-16 12:31:56,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:56,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:56,210 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:56,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:56,419 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:56,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:56,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 77 times [2020-10-16 12:31:56,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:56,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358860977] [2020-10-16 12:31:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:56,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358860977] [2020-10-16 12:31:56,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609068797] [2020-10-16 12:31:56,642 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 [2020-10-16 12:31:56,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 12:31:56,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:56,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:31:56,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:56,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:56,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:31:56,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [401236303] [2020-10-16 12:31:56,721 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:56,723 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:56,729 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:31:56,730 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:56,743 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:56,743 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:56,769 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25248#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-16 12:31:56,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:31:56,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:56,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:31:56,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:31:56,770 INFO L87 Difference]: Start difference. First operand 78 states and 196 transitions. Second operand 22 states. [2020-10-16 12:31:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:57,682 INFO L93 Difference]: Finished difference Result 123 states and 288 transitions. [2020-10-16 12:31:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:31:57,683 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:31:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:57,684 INFO L225 Difference]: With dead ends: 123 [2020-10-16 12:31:57,684 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 12:31:57,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=753, Invalid=2003, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 12:31:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 12:31:57,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2020-10-16 12:31:57,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 12:31:57,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 202 transitions. [2020-10-16 12:31:57,687 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 202 transitions. Word has length 25 [2020-10-16 12:31:57,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:57,688 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 202 transitions. [2020-10-16 12:31:57,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:31:57,688 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 202 transitions. [2020-10-16 12:31:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:57,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:57,688 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:57,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:57,898 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:57,898 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 78 times [2020-10-16 12:31:57,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:57,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638382176] [2020-10-16 12:31:57,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:58,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638382176] [2020-10-16 12:31:58,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321021111] [2020-10-16 12:31:58,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:58,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 12:31:58,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:31:58,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:31:58,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:58,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:58,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:31:58,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [437232609] [2020-10-16 12:31:58,175 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:58,177 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:58,182 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:31:58,182 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:58,190 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:58,190 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:58,215 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25687#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-16 12:31:58,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:31:58,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:58,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:31:58,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:31:58,216 INFO L87 Difference]: Start difference. First operand 80 states and 202 transitions. Second operand 22 states. [2020-10-16 12:31:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:59,205 INFO L93 Difference]: Finished difference Result 121 states and 286 transitions. [2020-10-16 12:31:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:31:59,205 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:31:59,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:59,206 INFO L225 Difference]: With dead ends: 121 [2020-10-16 12:31:59,207 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 12:31:59,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=848, Invalid=2122, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 12:31:59,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 12:31:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2020-10-16 12:31:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 12:31:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 208 transitions. [2020-10-16 12:31:59,210 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 208 transitions. Word has length 25 [2020-10-16 12:31:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:59,210 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 208 transitions. [2020-10-16 12:31:59,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:31:59,210 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 208 transitions. [2020-10-16 12:31:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:31:59,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:31:59,211 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:31:59,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-16 12:31:59,411 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:31:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:31:59,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 79 times [2020-10-16 12:31:59,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:31:59,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573815000] [2020-10-16 12:31:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:31:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:59,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573815000] [2020-10-16 12:31:59,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533070904] [2020-10-16 12:31:59,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:59,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:31:59,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:59,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:31:59,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:31:59,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1331881928] [2020-10-16 12:31:59,662 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:59,664 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:59,669 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:31:59,669 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:59,675 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:31:59,676 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:31:59,700 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26132#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-16 12:31:59,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:31:59,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:59,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:31:59,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:31:59,701 INFO L87 Difference]: Start difference. First operand 82 states and 208 transitions. Second operand 22 states. [2020-10-16 12:32:00,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:00,778 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-10-16 12:32:00,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:32:00,779 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:32:00,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:00,780 INFO L225 Difference]: With dead ends: 121 [2020-10-16 12:32:00,780 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 12:32:00,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=959, Invalid=2233, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 12:32:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 12:32:00,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2020-10-16 12:32:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 12:32:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 216 transitions. [2020-10-16 12:32:00,783 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 216 transitions. Word has length 25 [2020-10-16 12:32:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:00,783 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 216 transitions. [2020-10-16 12:32:00,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:32:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 216 transitions. [2020-10-16 12:32:00,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:32:00,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:00,784 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:00,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:00,987 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:00,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:00,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 80 times [2020-10-16 12:32:00,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:00,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366335964] [2020-10-16 12:32:00,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:01,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366335964] [2020-10-16 12:32:01,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920957644] [2020-10-16 12:32:01,195 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 [2020-10-16 12:32:01,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:32:01,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:32:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:01,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:01,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 12:32:01,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [58620296] [2020-10-16 12:32:01,269 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:01,271 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:01,276 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-16 12:32:01,276 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:01,283 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:01,284 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:01,308 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26585#(and (<= ~i~0 26) (<= ~j~0 20))] [2020-10-16 12:32:01,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:32:01,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:01,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:32:01,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:32:01,309 INFO L87 Difference]: Start difference. First operand 84 states and 216 transitions. Second operand 22 states. [2020-10-16 12:32:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:02,420 INFO L93 Difference]: Finished difference Result 122 states and 299 transitions. [2020-10-16 12:32:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 12:32:02,421 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 12:32:02,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:02,422 INFO L225 Difference]: With dead ends: 122 [2020-10-16 12:32:02,422 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 12:32:02,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1084, Invalid=2338, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 12:32:02,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 12:32:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2020-10-16 12:32:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 12:32:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-16 12:32:02,425 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 25 [2020-10-16 12:32:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:02,425 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-16 12:32:02,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:32:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-16 12:32:02,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:02,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:02,426 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:02,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:02,633 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:02,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:02,634 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 81 times [2020-10-16 12:32:02,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:02,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975621651] [2020-10-16 12:32:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:03,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975621651] [2020-10-16 12:32:03,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900566118] [2020-10-16 12:32:03,013 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 [2020-10-16 12:32:03,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 12:32:03,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:03,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:03,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:03,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:03,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:03,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [84665050] [2020-10-16 12:32:03,116 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:03,119 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:03,128 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 42 transitions. [2020-10-16 12:32:03,129 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:03,135 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:03,135 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:03,184 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27011#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:32:03,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:03,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:03,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:03,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:03,186 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 23 states. [2020-10-16 12:32:03,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:03,833 INFO L93 Difference]: Finished difference Result 118 states and 270 transitions. [2020-10-16 12:32:03,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:32:03,833 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:03,835 INFO L225 Difference]: With dead ends: 118 [2020-10-16 12:32:03,835 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 12:32:03,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=527, Invalid=1365, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 12:32:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 12:32:03,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2020-10-16 12:32:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 12:32:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 180 transitions. [2020-10-16 12:32:03,838 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 180 transitions. Word has length 26 [2020-10-16 12:32:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:03,838 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 180 transitions. [2020-10-16 12:32:03,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 180 transitions. [2020-10-16 12:32:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:03,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:03,839 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:04,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:04,048 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:04,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:04,048 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 82 times [2020-10-16 12:32:04,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:04,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509324647] [2020-10-16 12:32:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:04,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509324647] [2020-10-16 12:32:04,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245124708] [2020-10-16 12:32:04,314 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 [2020-10-16 12:32:04,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:32:04,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:04,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:04,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:04,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:04,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:04,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1621263714] [2020-10-16 12:32:04,391 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:04,393 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:04,400 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:04,400 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:04,405 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:04,406 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:04,441 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27415#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:32:04,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:04,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:04,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:04,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:04,442 INFO L87 Difference]: Start difference. First operand 73 states and 180 transitions. Second operand 23 states. [2020-10-16 12:32:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:05,109 INFO L93 Difference]: Finished difference Result 115 states and 266 transitions. [2020-10-16 12:32:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:32:05,110 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:05,111 INFO L225 Difference]: With dead ends: 115 [2020-10-16 12:32:05,111 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 12:32:05,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 12:32:05,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 12:32:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2020-10-16 12:32:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 12:32:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 186 transitions. [2020-10-16 12:32:05,114 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 186 transitions. Word has length 26 [2020-10-16 12:32:05,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:05,115 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 186 transitions. [2020-10-16 12:32:05,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:05,115 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 186 transitions. [2020-10-16 12:32:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:05,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:05,116 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:05,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:05,325 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:05,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:05,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 83 times [2020-10-16 12:32:05,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:05,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966304311] [2020-10-16 12:32:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:05,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966304311] [2020-10-16 12:32:05,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673162915] [2020-10-16 12:32:05,598 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 [2020-10-16 12:32:05,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 12:32:05,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:05,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:05,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:05,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:05,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:05,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1579017042] [2020-10-16 12:32:05,666 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:05,679 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:05,685 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:05,686 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:05,692 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:05,692 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:05,734 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27824#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:32:05,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:05,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:05,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:05,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:05,735 INFO L87 Difference]: Start difference. First operand 75 states and 186 transitions. Second operand 23 states. [2020-10-16 12:32:06,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:06,482 INFO L93 Difference]: Finished difference Result 113 states and 264 transitions. [2020-10-16 12:32:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:32:06,483 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:06,484 INFO L225 Difference]: With dead ends: 113 [2020-10-16 12:32:06,484 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 12:32:06,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 12:32:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 12:32:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2020-10-16 12:32:06,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 12:32:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 192 transitions. [2020-10-16 12:32:06,486 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 192 transitions. Word has length 26 [2020-10-16 12:32:06,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:06,486 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 192 transitions. [2020-10-16 12:32:06,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 192 transitions. [2020-10-16 12:32:06,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:06,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:06,487 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:06,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:06,689 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:06,690 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 84 times [2020-10-16 12:32:06,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:06,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669973187] [2020-10-16 12:32:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:06,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669973187] [2020-10-16 12:32:06,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538681341] [2020-10-16 12:32:06,935 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 [2020-10-16 12:32:06,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 12:32:06,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:06,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:06,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:07,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:07,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:07,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [910559533] [2020-10-16 12:32:07,010 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:07,013 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:07,020 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:07,020 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:07,031 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:07,032 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:07,059 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28239#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-16 12:32:07,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:07,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:07,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:07,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:07,060 INFO L87 Difference]: Start difference. First operand 77 states and 192 transitions. Second operand 23 states. [2020-10-16 12:32:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:07,853 INFO L93 Difference]: Finished difference Result 111 states and 262 transitions. [2020-10-16 12:32:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:32:07,854 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:07,855 INFO L225 Difference]: With dead ends: 111 [2020-10-16 12:32:07,855 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 12:32:07,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1827, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 12:32:07,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 12:32:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2020-10-16 12:32:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 12:32:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 198 transitions. [2020-10-16 12:32:07,858 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 198 transitions. Word has length 26 [2020-10-16 12:32:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:07,858 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 198 transitions. [2020-10-16 12:32:07,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:07,858 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 198 transitions. [2020-10-16 12:32:07,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:07,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:07,859 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:08,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:08,067 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:08,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:08,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 85 times [2020-10-16 12:32:08,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:08,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833891366] [2020-10-16 12:32:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:08,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833891366] [2020-10-16 12:32:08,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067584604] [2020-10-16 12:32:08,312 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 [2020-10-16 12:32:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:08,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:08,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:08,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:08,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:08,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1682593313] [2020-10-16 12:32:08,382 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:08,384 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:08,389 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:08,389 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:08,398 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:08,398 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:08,437 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28660#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-16 12:32:08,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:08,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:08,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:08,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:08,438 INFO L87 Difference]: Start difference. First operand 79 states and 198 transitions. Second operand 23 states. [2020-10-16 12:32:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:09,369 INFO L93 Difference]: Finished difference Result 109 states and 260 transitions. [2020-10-16 12:32:09,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:32:09,369 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:09,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:09,371 INFO L225 Difference]: With dead ends: 109 [2020-10-16 12:32:09,371 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 12:32:09,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=687, Invalid=1965, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 12:32:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 12:32:09,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2020-10-16 12:32:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 12:32:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 204 transitions. [2020-10-16 12:32:09,374 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 204 transitions. Word has length 26 [2020-10-16 12:32:09,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:09,375 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 204 transitions. [2020-10-16 12:32:09,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 204 transitions. [2020-10-16 12:32:09,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:09,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:09,375 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:09,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-16 12:32:09,577 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:09,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 86 times [2020-10-16 12:32:09,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:09,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762995288] [2020-10-16 12:32:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:09,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762995288] [2020-10-16 12:32:09,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500420189] [2020-10-16 12:32:09,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:09,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:32:09,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:09,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:09,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:09,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:09,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:09,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [423513515] [2020-10-16 12:32:09,871 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:09,874 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:09,880 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:09,880 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:09,883 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:09,883 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:09,922 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29087#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-16 12:32:09,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:09,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:09,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:09,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:09,923 INFO L87 Difference]: Start difference. First operand 81 states and 204 transitions. Second operand 23 states. [2020-10-16 12:32:10,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:10,857 INFO L93 Difference]: Finished difference Result 107 states and 258 transitions. [2020-10-16 12:32:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:32:10,857 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:10,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:10,858 INFO L225 Difference]: With dead ends: 107 [2020-10-16 12:32:10,859 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 12:32:10,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=767, Invalid=2095, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 12:32:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 12:32:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-10-16 12:32:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 12:32:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 210 transitions. [2020-10-16 12:32:10,862 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 210 transitions. Word has length 26 [2020-10-16 12:32:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:10,862 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 210 transitions. [2020-10-16 12:32:10,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:10,863 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 210 transitions. [2020-10-16 12:32:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:10,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:10,863 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:11,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:11,071 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:11,072 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 87 times [2020-10-16 12:32:11,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:11,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795256313] [2020-10-16 12:32:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:11,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795256313] [2020-10-16 12:32:11,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359959985] [2020-10-16 12:32:11,308 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 [2020-10-16 12:32:11,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 12:32:11,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:11,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:11,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:11,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:11,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:11,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [423973251] [2020-10-16 12:32:11,425 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:11,428 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:11,434 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:11,435 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:11,439 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:11,439 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:11,472 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29520#(and (<= ~i~0 26) (<= ~j~0 20))] [2020-10-16 12:32:11,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:11,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:11,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:11,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:11,473 INFO L87 Difference]: Start difference. First operand 83 states and 210 transitions. Second operand 23 states. [2020-10-16 12:32:12,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:12,555 INFO L93 Difference]: Finished difference Result 105 states and 256 transitions. [2020-10-16 12:32:12,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:32:12,556 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:12,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:12,557 INFO L225 Difference]: With dead ends: 105 [2020-10-16 12:32:12,557 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 12:32:12,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=863, Invalid=2217, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 12:32:12,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 12:32:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2020-10-16 12:32:12,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 12:32:12,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 216 transitions. [2020-10-16 12:32:12,560 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 216 transitions. Word has length 26 [2020-10-16 12:32:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:12,560 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 216 transitions. [2020-10-16 12:32:12,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:12,560 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 216 transitions. [2020-10-16 12:32:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:12,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:12,561 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:12,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-16 12:32:12,762 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:12,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:12,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 88 times [2020-10-16 12:32:12,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:12,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758966452] [2020-10-16 12:32:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:12,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758966452] [2020-10-16 12:32:12,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333104595] [2020-10-16 12:32:12,990 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 [2020-10-16 12:32:13,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:32:13,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:13,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:13,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:13,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:13,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [141544075] [2020-10-16 12:32:13,076 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:13,078 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:13,085 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:13,085 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:13,096 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:13,096 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:13,123 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29959#(and (<= ~i~0 26) (<= ~j~0 22))] [2020-10-16 12:32:13,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:13,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:13,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:13,124 INFO L87 Difference]: Start difference. First operand 85 states and 216 transitions. Second operand 23 states. [2020-10-16 12:32:14,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:14,251 INFO L93 Difference]: Finished difference Result 105 states and 259 transitions. [2020-10-16 12:32:14,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:32:14,252 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:14,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:14,253 INFO L225 Difference]: With dead ends: 105 [2020-10-16 12:32:14,253 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 12:32:14,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=975, Invalid=2331, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 12:32:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 12:32:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-10-16 12:32:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 12:32:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 224 transitions. [2020-10-16 12:32:14,257 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 224 transitions. Word has length 26 [2020-10-16 12:32:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:14,257 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 224 transitions. [2020-10-16 12:32:14,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 224 transitions. [2020-10-16 12:32:14,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 12:32:14,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:14,258 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:14,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-16 12:32:14,467 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 89 times [2020-10-16 12:32:14,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:14,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127480771] [2020-10-16 12:32:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:14,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127480771] [2020-10-16 12:32:14,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856119496] [2020-10-16 12:32:14,684 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 [2020-10-16 12:32:14,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 12:32:14,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:32:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:14,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:14,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 12:32:14,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1489443752] [2020-10-16 12:32:14,815 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:14,818 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:14,826 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-16 12:32:14,826 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:14,832 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:14,833 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:14,880 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30406#(and (<= ~i~0 26) (<= ~j~0 24))] [2020-10-16 12:32:14,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:32:14,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:14,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:32:14,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:32:14,882 INFO L87 Difference]: Start difference. First operand 87 states and 224 transitions. Second operand 23 states. [2020-10-16 12:32:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:16,091 INFO L93 Difference]: Finished difference Result 105 states and 267 transitions. [2020-10-16 12:32:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 12:32:16,092 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 12:32:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:16,093 INFO L225 Difference]: With dead ends: 105 [2020-10-16 12:32:16,093 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 12:32:16,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1101, Invalid=2439, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 12:32:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 12:32:16,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-10-16 12:32:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 12:32:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-16 12:32:16,095 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 26 [2020-10-16 12:32:16,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:16,096 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-16 12:32:16,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:32:16,096 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-16 12:32:16,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:16,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:16,096 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:16,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:16,297 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:16,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:16,298 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 90 times [2020-10-16 12:32:16,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:16,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416136273] [2020-10-16 12:32:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:16,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416136273] [2020-10-16 12:32:16,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746038467] [2020-10-16 12:32:16,632 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 [2020-10-16 12:32:16,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 12:32:16,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:16,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:16,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:16,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:16,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:16,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [498531968] [2020-10-16 12:32:16,714 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:16,718 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:16,725 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2020-10-16 12:32:16,726 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:16,734 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:16,734 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:16,760 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:16,760 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:16,779 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:16,779 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:16,782 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:16,782 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:16,789 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30819#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-16 12:32:16,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:16,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:16,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:16,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:16,790 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 24 states. [2020-10-16 12:32:17,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:17,544 INFO L93 Difference]: Finished difference Result 102 states and 238 transitions. [2020-10-16 12:32:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:32:17,545 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:17,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:17,547 INFO L225 Difference]: With dead ends: 102 [2020-10-16 12:32:17,547 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 12:32:17,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=577, Invalid=1403, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 12:32:17,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 12:32:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-16 12:32:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 12:32:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-10-16 12:32:17,550 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 27 [2020-10-16 12:32:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:17,551 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-10-16 12:32:17,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-10-16 12:32:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:17,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:17,552 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:17,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:17,763 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:17,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:17,764 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 91 times [2020-10-16 12:32:17,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:17,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306725813] [2020-10-16 12:32:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:18,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306725813] [2020-10-16 12:32:18,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579469889] [2020-10-16 12:32:18,052 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 [2020-10-16 12:32:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:18,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:18,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:18,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:18,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:18,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1484096198] [2020-10-16 12:32:18,133 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:18,135 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:18,141 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:18,141 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:18,149 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:18,150 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:18,181 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31213#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-16 12:32:18,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:18,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:18,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:18,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:18,182 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 24 states. [2020-10-16 12:32:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:18,924 INFO L93 Difference]: Finished difference Result 142 states and 320 transitions. [2020-10-16 12:32:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:32:18,925 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:18,926 INFO L225 Difference]: With dead ends: 142 [2020-10-16 12:32:18,926 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 12:32:18,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=636, Invalid=1716, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 12:32:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 12:32:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 76. [2020-10-16 12:32:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 12:32:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 188 transitions. [2020-10-16 12:32:18,930 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 188 transitions. Word has length 27 [2020-10-16 12:32:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:18,930 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 188 transitions. [2020-10-16 12:32:18,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 188 transitions. [2020-10-16 12:32:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:18,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:18,931 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:19,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:19,132 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:19,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 92 times [2020-10-16 12:32:19,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:19,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686058828] [2020-10-16 12:32:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:19,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686058828] [2020-10-16 12:32:19,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083028203] [2020-10-16 12:32:19,441 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 [2020-10-16 12:32:19,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:32:19,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:19,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:19,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:19,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:19,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:19,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1683063957] [2020-10-16 12:32:19,506 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:19,508 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:19,514 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:19,514 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:19,518 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:19,518 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:19,553 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31659#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:32:19,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:19,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:19,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:19,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:19,554 INFO L87 Difference]: Start difference. First operand 76 states and 188 transitions. Second operand 24 states. [2020-10-16 12:32:20,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:20,380 INFO L93 Difference]: Finished difference Result 139 states and 316 transitions. [2020-10-16 12:32:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:32:20,381 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:20,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:20,382 INFO L225 Difference]: With dead ends: 139 [2020-10-16 12:32:20,382 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 12:32:20,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=665, Invalid=1885, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 12:32:20,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 12:32:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 78. [2020-10-16 12:32:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 12:32:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 194 transitions. [2020-10-16 12:32:20,385 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 194 transitions. Word has length 27 [2020-10-16 12:32:20,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:20,385 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 194 transitions. [2020-10-16 12:32:20,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:20,385 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 194 transitions. [2020-10-16 12:32:20,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:20,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:20,386 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:20,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-16 12:32:20,586 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:20,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 93 times [2020-10-16 12:32:20,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:20,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348681141] [2020-10-16 12:32:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:20,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348681141] [2020-10-16 12:32:20,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012898355] [2020-10-16 12:32:20,871 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 [2020-10-16 12:32:20,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 12:32:20,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:20,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:20,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:20,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:20,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:20,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [319832105] [2020-10-16 12:32:20,943 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:20,945 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:20,954 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:20,955 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:20,963 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:20,963 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:20,991 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32110#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:32:20,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:20,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:20,992 INFO L87 Difference]: Start difference. First operand 78 states and 194 transitions. Second operand 24 states. [2020-10-16 12:32:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:21,887 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2020-10-16 12:32:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:32:21,888 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:21,889 INFO L225 Difference]: With dead ends: 137 [2020-10-16 12:32:21,889 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 12:32:21,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=710, Invalid=2046, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 12:32:21,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 12:32:21,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 80. [2020-10-16 12:32:21,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 12:32:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 200 transitions. [2020-10-16 12:32:21,892 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 200 transitions. Word has length 27 [2020-10-16 12:32:21,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:21,892 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 200 transitions. [2020-10-16 12:32:21,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 200 transitions. [2020-10-16 12:32:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:21,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:21,893 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:22,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:22,094 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:22,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:22,094 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 94 times [2020-10-16 12:32:22,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:22,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99661786] [2020-10-16 12:32:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:22,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99661786] [2020-10-16 12:32:22,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11543867] [2020-10-16 12:32:22,376 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 [2020-10-16 12:32:22,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:32:22,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:22,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:22,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:22,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:22,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:22,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1425857376] [2020-10-16 12:32:22,457 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:22,462 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:22,470 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:22,470 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:22,480 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:22,480 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:22,509 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32567#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:32:22,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:22,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:22,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:22,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:22,510 INFO L87 Difference]: Start difference. First operand 80 states and 200 transitions. Second operand 24 states. [2020-10-16 12:32:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:23,599 INFO L93 Difference]: Finished difference Result 135 states and 312 transitions. [2020-10-16 12:32:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:32:23,600 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:23,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:23,601 INFO L225 Difference]: With dead ends: 135 [2020-10-16 12:32:23,602 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 12:32:23,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=771, Invalid=2199, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 12:32:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 12:32:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2020-10-16 12:32:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 12:32:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2020-10-16 12:32:23,609 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 27 [2020-10-16 12:32:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:23,609 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2020-10-16 12:32:23,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2020-10-16 12:32:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:23,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:23,611 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:23,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-16 12:32:23,822 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:23,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:23,823 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 95 times [2020-10-16 12:32:23,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:23,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061440601] [2020-10-16 12:32:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:24,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061440601] [2020-10-16 12:32:24,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8830726] [2020-10-16 12:32:24,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 12:32:24,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 12:32:24,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:24,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:24,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:24,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:24,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:24,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1846354504] [2020-10-16 12:32:24,177 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:24,179 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:24,185 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:24,185 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:24,205 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:24,205 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:24,229 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33030#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-16 12:32:24,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:24,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:24,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:24,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:24,230 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 24 states. [2020-10-16 12:32:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:25,282 INFO L93 Difference]: Finished difference Result 133 states and 310 transitions. [2020-10-16 12:32:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:32:25,283 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:25,284 INFO L225 Difference]: With dead ends: 133 [2020-10-16 12:32:25,284 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 12:32:25,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=848, Invalid=2344, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 12:32:25,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 12:32:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2020-10-16 12:32:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 12:32:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 212 transitions. [2020-10-16 12:32:25,287 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 212 transitions. Word has length 27 [2020-10-16 12:32:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:25,287 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 212 transitions. [2020-10-16 12:32:25,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 212 transitions. [2020-10-16 12:32:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:25,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:25,288 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:25,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:25,489 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:25,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:25,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 96 times [2020-10-16 12:32:25,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:25,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064819815] [2020-10-16 12:32:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:25,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064819815] [2020-10-16 12:32:25,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101167829] [2020-10-16 12:32:25,755 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 [2020-10-16 12:32:25,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 12:32:25,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:25,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:25,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:25,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:25,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:25,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2107287386] [2020-10-16 12:32:25,829 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:25,831 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:25,836 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:25,836 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:25,841 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:25,841 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:25,872 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33499#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-16 12:32:25,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:25,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:25,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:25,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:25,873 INFO L87 Difference]: Start difference. First operand 84 states and 212 transitions. Second operand 24 states. [2020-10-16 12:32:27,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:27,009 INFO L93 Difference]: Finished difference Result 131 states and 308 transitions. [2020-10-16 12:32:27,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:32:27,010 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:27,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:27,011 INFO L225 Difference]: With dead ends: 131 [2020-10-16 12:32:27,011 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 12:32:27,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=941, Invalid=2481, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 12:32:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 12:32:27,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-16 12:32:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 12:32:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 218 transitions. [2020-10-16 12:32:27,015 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 218 transitions. Word has length 27 [2020-10-16 12:32:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:27,015 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 218 transitions. [2020-10-16 12:32:27,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 218 transitions. [2020-10-16 12:32:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:27,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:27,018 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:27,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:27,221 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:27,221 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 97 times [2020-10-16 12:32:27,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:27,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946289953] [2020-10-16 12:32:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:27,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946289953] [2020-10-16 12:32:27,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184517454] [2020-10-16 12:32:27,485 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 [2020-10-16 12:32:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:27,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:27,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:27,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:27,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:27,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [698558288] [2020-10-16 12:32:27,557 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:27,558 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:27,563 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:27,563 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:27,567 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:27,567 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:27,598 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33974#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-16 12:32:27,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:27,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:27,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:27,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:27,598 INFO L87 Difference]: Start difference. First operand 86 states and 218 transitions. Second operand 24 states. [2020-10-16 12:32:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:28,808 INFO L93 Difference]: Finished difference Result 129 states and 306 transitions. [2020-10-16 12:32:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 12:32:28,809 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:28,810 INFO L225 Difference]: With dead ends: 129 [2020-10-16 12:32:28,810 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 12:32:28,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1050, Invalid=2610, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 12:32:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 12:32:28,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2020-10-16 12:32:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 12:32:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 224 transitions. [2020-10-16 12:32:28,813 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 224 transitions. Word has length 27 [2020-10-16 12:32:28,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:28,814 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 224 transitions. [2020-10-16 12:32:28,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:28,814 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 224 transitions. [2020-10-16 12:32:28,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:28,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:28,814 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:29,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-16 12:32:29,023 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:29,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:29,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 98 times [2020-10-16 12:32:29,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:29,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976230366] [2020-10-16 12:32:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:29,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976230366] [2020-10-16 12:32:29,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170873540] [2020-10-16 12:32:29,262 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 [2020-10-16 12:32:29,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:32:29,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:29,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:29,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:29,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:29,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [987627896] [2020-10-16 12:32:29,338 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:29,339 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:29,363 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:29,363 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:29,367 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:29,368 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:29,405 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34455#(and (<= ~i~0 26) (<= ~j~0 20))] [2020-10-16 12:32:29,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:29,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:29,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:29,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:29,406 INFO L87 Difference]: Start difference. First operand 88 states and 224 transitions. Second operand 24 states. [2020-10-16 12:32:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:30,702 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-16 12:32:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 12:32:30,703 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:30,704 INFO L225 Difference]: With dead ends: 129 [2020-10-16 12:32:30,704 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 12:32:30,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1175, Invalid=2731, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 12:32:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 12:32:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 90. [2020-10-16 12:32:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-16 12:32:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 232 transitions. [2020-10-16 12:32:30,707 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 232 transitions. Word has length 27 [2020-10-16 12:32:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:30,708 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 232 transitions. [2020-10-16 12:32:30,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:30,708 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 232 transitions. [2020-10-16 12:32:30,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:32:30,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:30,708 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:30,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-10-16 12:32:30,917 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:30,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 99 times [2020-10-16 12:32:30,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:30,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820263654] [2020-10-16 12:32:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:31,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820263654] [2020-10-16 12:32:31,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252588688] [2020-10-16 12:32:31,177 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 [2020-10-16 12:32:31,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 12:32:31,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:31,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 12:32:31,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:31,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:31,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 12:32:31,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1644448677] [2020-10-16 12:32:31,263 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:31,265 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:31,271 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-16 12:32:31,271 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:31,274 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:31,275 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:31,312 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34944#(and (<= ~i~0 26) (<= ~j~0 22))] [2020-10-16 12:32:31,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:32:31,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:31,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:32:31,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:32:31,313 INFO L87 Difference]: Start difference. First operand 90 states and 232 transitions. Second operand 24 states. [2020-10-16 12:32:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:32,675 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-10-16 12:32:32,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 12:32:32,676 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 12:32:32,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:32,677 INFO L225 Difference]: With dead ends: 130 [2020-10-16 12:32:32,677 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 12:32:32,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1314, Invalid=2846, Unknown=0, NotChecked=0, Total=4160 [2020-10-16 12:32:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 12:32:32,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 70. [2020-10-16 12:32:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 12:32:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-16 12:32:32,687 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 27 [2020-10-16 12:32:32,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:32,687 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-16 12:32:32,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:32:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-16 12:32:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:32,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:32,688 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:32,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:32,897 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:32,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:32,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 100 times [2020-10-16 12:32:32,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:32,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104015333] [2020-10-16 12:32:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:33,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104015333] [2020-10-16 12:32:33,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783903635] [2020-10-16 12:32:33,266 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 [2020-10-16 12:32:33,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:32:33,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:33,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:33,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:33,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:33,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:33,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1554418809] [2020-10-16 12:32:33,331 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:33,333 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:33,341 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 44 transitions. [2020-10-16 12:32:33,341 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:33,344 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:33,345 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:33,386 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35402#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-16 12:32:33,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:33,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:33,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:33,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:33,387 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 25 states. [2020-10-16 12:32:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:34,084 INFO L93 Difference]: Finished difference Result 126 states and 288 transitions. [2020-10-16 12:32:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:32:34,085 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:34,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:34,086 INFO L225 Difference]: With dead ends: 126 [2020-10-16 12:32:34,086 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 12:32:34,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=1624, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 12:32:34,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 12:32:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 77. [2020-10-16 12:32:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 12:32:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-16 12:32:34,089 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 28 [2020-10-16 12:32:34,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:34,090 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-16 12:32:34,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:34,090 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-16 12:32:34,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:34,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:34,090 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:34,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 12:32:34,295 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:34,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:34,295 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 101 times [2020-10-16 12:32:34,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:34,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063605759] [2020-10-16 12:32:34,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:34,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063605759] [2020-10-16 12:32:34,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510786491] [2020-10-16 12:32:34,646 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 [2020-10-16 12:32:34,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 12:32:34,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:34,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:34,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:34,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:34,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:34,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1505247964] [2020-10-16 12:32:34,716 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:34,717 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:34,723 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:34,723 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:34,738 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:34,739 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:34,770 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35834#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-16 12:32:34,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:34,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:34,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:34,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:34,771 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 25 states. [2020-10-16 12:32:35,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:35,558 INFO L93 Difference]: Finished difference Result 123 states and 284 transitions. [2020-10-16 12:32:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:32:35,559 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:35,559 INFO L225 Difference]: With dead ends: 123 [2020-10-16 12:32:35,559 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 12:32:35,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 12:32:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 12:32:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-16 12:32:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 12:32:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 196 transitions. [2020-10-16 12:32:35,563 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 196 transitions. Word has length 28 [2020-10-16 12:32:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:35,563 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 196 transitions. [2020-10-16 12:32:35,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 196 transitions. [2020-10-16 12:32:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:35,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:35,563 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:35,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-16 12:32:35,764 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:35,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:35,765 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 102 times [2020-10-16 12:32:35,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:35,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26833744] [2020-10-16 12:32:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:36,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26833744] [2020-10-16 12:32:36,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577778038] [2020-10-16 12:32:36,112 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 [2020-10-16 12:32:36,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 12:32:36,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:36,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:36,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:36,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:36,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:36,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1023775838] [2020-10-16 12:32:36,184 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:36,186 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:36,191 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:36,192 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:36,205 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:36,206 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:36,234 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36271#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-16 12:32:36,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:36,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:36,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:36,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:36,235 INFO L87 Difference]: Start difference. First operand 79 states and 196 transitions. Second operand 25 states. [2020-10-16 12:32:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:37,127 INFO L93 Difference]: Finished difference Result 121 states and 282 transitions. [2020-10-16 12:32:37,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:32:37,128 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:37,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:37,129 INFO L225 Difference]: With dead ends: 121 [2020-10-16 12:32:37,129 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 12:32:37,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=676, Invalid=1976, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 12:32:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 12:32:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-16 12:32:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 12:32:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2020-10-16 12:32:37,131 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 28 [2020-10-16 12:32:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:37,132 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2020-10-16 12:32:37,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:37,132 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2020-10-16 12:32:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:37,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:37,132 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:37,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 12:32:37,340 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:37,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:37,340 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 103 times [2020-10-16 12:32:37,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:37,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86908852] [2020-10-16 12:32:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:37,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86908852] [2020-10-16 12:32:37,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522413180] [2020-10-16 12:32:37,654 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 [2020-10-16 12:32:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:37,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:37,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:37,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:37,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1403250687] [2020-10-16 12:32:37,727 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:37,730 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:37,737 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:37,737 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:37,747 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:37,747 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:37,774 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36714#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-16 12:32:37,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:37,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:37,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:37,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:37,775 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 25 states. [2020-10-16 12:32:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:38,740 INFO L93 Difference]: Finished difference Result 119 states and 280 transitions. [2020-10-16 12:32:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 12:32:38,741 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:38,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:38,742 INFO L225 Difference]: With dead ends: 119 [2020-10-16 12:32:38,742 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 12:32:38,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=722, Invalid=2140, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 12:32:38,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 12:32:38,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-16 12:32:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 12:32:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 208 transitions. [2020-10-16 12:32:38,745 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 208 transitions. Word has length 28 [2020-10-16 12:32:38,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:38,746 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 208 transitions. [2020-10-16 12:32:38,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:38,746 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 208 transitions. [2020-10-16 12:32:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:38,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:38,746 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:38,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:38,950 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:38,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:38,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 104 times [2020-10-16 12:32:38,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:38,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19182282] [2020-10-16 12:32:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:39,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19182282] [2020-10-16 12:32:39,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018302605] [2020-10-16 12:32:39,273 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 [2020-10-16 12:32:39,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:32:39,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:39,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:39,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:39,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:39,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:39,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1815503368] [2020-10-16 12:32:39,340 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:39,342 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:39,347 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:39,348 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:39,348 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:39,349 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:39,404 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37163#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-16 12:32:39,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:39,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:39,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:39,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:39,405 INFO L87 Difference]: Start difference. First operand 83 states and 208 transitions. Second operand 25 states. [2020-10-16 12:32:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:40,461 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-10-16 12:32:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:32:40,462 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:40,463 INFO L225 Difference]: With dead ends: 117 [2020-10-16 12:32:40,463 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 12:32:40,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=784, Invalid=2296, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 12:32:40,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 12:32:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2020-10-16 12:32:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 12:32:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 214 transitions. [2020-10-16 12:32:40,467 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 214 transitions. Word has length 28 [2020-10-16 12:32:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:40,467 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 214 transitions. [2020-10-16 12:32:40,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 214 transitions. [2020-10-16 12:32:40,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:40,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:40,468 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:40,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-16 12:32:40,671 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:40,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:40,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 105 times [2020-10-16 12:32:40,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:40,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376681918] [2020-10-16 12:32:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:40,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376681918] [2020-10-16 12:32:40,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046632324] [2020-10-16 12:32:40,966 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 [2020-10-16 12:32:41,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 12:32:41,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:41,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:41,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:41,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:41,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:41,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1222873250] [2020-10-16 12:32:41,041 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:41,042 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:41,048 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:41,048 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:41,049 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:41,049 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:41,087 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37618#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-16 12:32:41,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:41,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:41,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:41,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:41,088 INFO L87 Difference]: Start difference. First operand 85 states and 214 transitions. Second operand 25 states. [2020-10-16 12:32:42,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:42,251 INFO L93 Difference]: Finished difference Result 115 states and 276 transitions. [2020-10-16 12:32:42,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:32:42,252 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:42,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:42,252 INFO L225 Difference]: With dead ends: 115 [2020-10-16 12:32:42,253 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 12:32:42,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=862, Invalid=2444, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 12:32:42,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 12:32:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2020-10-16 12:32:42,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 12:32:42,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 220 transitions. [2020-10-16 12:32:42,256 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 220 transitions. Word has length 28 [2020-10-16 12:32:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:42,256 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 220 transitions. [2020-10-16 12:32:42,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:42,256 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 220 transitions. [2020-10-16 12:32:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:42,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:42,256 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:42,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-16 12:32:42,457 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:42,458 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 106 times [2020-10-16 12:32:42,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:42,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426342147] [2020-10-16 12:32:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:42,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426342147] [2020-10-16 12:32:42,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663282683] [2020-10-16 12:32:42,745 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 [2020-10-16 12:32:42,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:32:42,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:42,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:42,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:42,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:42,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:42,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2083468316] [2020-10-16 12:32:42,818 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:42,820 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:42,825 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:42,826 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:42,836 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:42,836 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:42,865 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38079#(and (<= ~i~0 26) (<= ~j~0 20))] [2020-10-16 12:32:42,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:42,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:42,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:42,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:42,866 INFO L87 Difference]: Start difference. First operand 87 states and 220 transitions. Second operand 25 states. [2020-10-16 12:32:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:44,116 INFO L93 Difference]: Finished difference Result 113 states and 274 transitions. [2020-10-16 12:32:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:32:44,116 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:44,117 INFO L225 Difference]: With dead ends: 113 [2020-10-16 12:32:44,117 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 12:32:44,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=956, Invalid=2584, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 12:32:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 12:32:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2020-10-16 12:32:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-16 12:32:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 226 transitions. [2020-10-16 12:32:44,120 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 226 transitions. Word has length 28 [2020-10-16 12:32:44,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:44,120 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 226 transitions. [2020-10-16 12:32:44,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:44,120 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 226 transitions. [2020-10-16 12:32:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:44,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:44,120 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:44,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 12:32:44,321 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:44,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 107 times [2020-10-16 12:32:44,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:44,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312081308] [2020-10-16 12:32:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:44,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312081308] [2020-10-16 12:32:44,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185354740] [2020-10-16 12:32:44,606 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 [2020-10-16 12:32:44,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 12:32:44,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:44,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:44,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:44,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:44,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:44,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [813879724] [2020-10-16 12:32:44,687 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:44,688 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:44,694 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:44,694 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:44,695 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:44,696 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:44,735 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38546#(and (<= ~i~0 26) (<= ~j~0 22))] [2020-10-16 12:32:44,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:44,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:44,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:44,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:44,736 INFO L87 Difference]: Start difference. First operand 89 states and 226 transitions. Second operand 25 states. [2020-10-16 12:32:46,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:46,091 INFO L93 Difference]: Finished difference Result 111 states and 272 transitions. [2020-10-16 12:32:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 12:32:46,092 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:46,093 INFO L225 Difference]: With dead ends: 111 [2020-10-16 12:32:46,093 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 12:32:46,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1066, Invalid=2716, Unknown=0, NotChecked=0, Total=3782 [2020-10-16 12:32:46,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 12:32:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-16 12:32:46,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 12:32:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 232 transitions. [2020-10-16 12:32:46,098 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 232 transitions. Word has length 28 [2020-10-16 12:32:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:46,098 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 232 transitions. [2020-10-16 12:32:46,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 232 transitions. [2020-10-16 12:32:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:46,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:46,099 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:46,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:46,309 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:46,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 108 times [2020-10-16 12:32:46,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:46,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12004131] [2020-10-16 12:32:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:46,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12004131] [2020-10-16 12:32:46,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564343648] [2020-10-16 12:32:46,590 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 [2020-10-16 12:32:46,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 12:32:46,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:46,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:46,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:46,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:46,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:46,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2112781911] [2020-10-16 12:32:46,672 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:46,674 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:46,683 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:46,683 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:46,694 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:46,694 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:46,718 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39019#(and (<= ~i~0 26) (<= ~j~0 24))] [2020-10-16 12:32:46,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:46,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:46,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:46,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:46,720 INFO L87 Difference]: Start difference. First operand 91 states and 232 transitions. Second operand 25 states. [2020-10-16 12:32:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:48,126 INFO L93 Difference]: Finished difference Result 111 states and 275 transitions. [2020-10-16 12:32:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 12:32:48,129 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:48,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:48,129 INFO L225 Difference]: With dead ends: 111 [2020-10-16 12:32:48,130 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 12:32:48,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1192, Invalid=2840, Unknown=0, NotChecked=0, Total=4032 [2020-10-16 12:32:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 12:32:48,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-10-16 12:32:48,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 12:32:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 240 transitions. [2020-10-16 12:32:48,132 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 240 transitions. Word has length 28 [2020-10-16 12:32:48,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:48,132 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 240 transitions. [2020-10-16 12:32:48,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:48,132 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 240 transitions. [2020-10-16 12:32:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 12:32:48,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:48,132 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:48,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:48,333 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:48,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:48,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 109 times [2020-10-16 12:32:48,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:48,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999522099] [2020-10-16 12:32:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:48,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999522099] [2020-10-16 12:32:48,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707103101] [2020-10-16 12:32:48,617 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 [2020-10-16 12:32:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:48,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 12:32:48,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:48,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:32:48,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 12:32:48,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [796030814] [2020-10-16 12:32:48,708 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:48,710 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:48,716 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-16 12:32:48,716 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:48,717 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:32:48,717 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:32:48,754 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39500#(and (<= ~j~0 26) (<= ~i~0 26))] [2020-10-16 12:32:48,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 12:32:48,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:48,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 12:32:48,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:32:48,755 INFO L87 Difference]: Start difference. First operand 93 states and 240 transitions. Second operand 25 states. [2020-10-16 12:32:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:50,191 INFO L93 Difference]: Finished difference Result 109 states and 275 transitions. [2020-10-16 12:32:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 12:32:50,191 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 12:32:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:50,192 INFO L225 Difference]: With dead ends: 109 [2020-10-16 12:32:50,192 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 12:32:50,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1308, Invalid=2852, Unknown=0, NotChecked=0, Total=4160 [2020-10-16 12:32:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 12:32:50,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-10-16 12:32:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 12:32:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-16 12:32:50,195 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-10-16 12:32:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:50,195 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-16 12:32:50,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 12:32:50,195 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-16 12:32:50,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:32:50,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:50,196 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:50,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:32:50,405 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 110 times [2020-10-16 12:32:50,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:50,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127083417] [2020-10-16 12:32:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:50,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127083417] [2020-10-16 12:32:50,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736830095] [2020-10-16 12:32:50,536 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 [2020-10-16 12:32:50,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:32:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:32:50,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:50,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 12:32:50,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-10-16 12:32:50,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1200983478] [2020-10-16 12:32:50,600 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:50,602 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:50,608 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2020-10-16 12:32:50,608 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:50,628 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:32:50,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:32:50,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:50,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:32:50,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:32:50,629 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 13 states. [2020-10-16 12:32:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:50,661 INFO L93 Difference]: Finished difference Result 421 states and 1013 transitions. [2020-10-16 12:32:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 12:32:50,661 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-16 12:32:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:50,661 INFO L225 Difference]: With dead ends: 421 [2020-10-16 12:32:50,661 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 12:32:50,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:32:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 12:32:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-16 12:32:50,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 12:32:50,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2020-10-16 12:32:50,664 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 29 [2020-10-16 12:32:50,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:50,664 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2020-10-16 12:32:50,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:32:50,664 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2020-10-16 12:32:50,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:32:50,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:32:50,664 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:32:50,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 12:32:50,865 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:32:50,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:32:50,866 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 111 times [2020-10-16 12:32:50,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:32:50,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066652675] [2020-10-16 12:32:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:32:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:32:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:51,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066652675] [2020-10-16 12:32:51,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57333945] [2020-10-16 12:32:51,330 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 [2020-10-16 12:32:51,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 12:32:51,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:32:51,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:32:51,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:32:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:32:51,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 12:32:51,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [23] total 36 [2020-10-16 12:32:51,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [807605405] [2020-10-16 12:32:51,677 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:32:51,679 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:32:51,686 INFO L258 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2020-10-16 12:32:51,686 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:32:51,748 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:32:51,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:32:51,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:32:51,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:32:51,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 12:32:51,749 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand 13 states. [2020-10-16 12:32:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:32:51,777 INFO L93 Difference]: Finished difference Result 256 states and 475 transitions. [2020-10-16 12:32:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 12:32:51,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-16 12:32:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:32:51,778 INFO L225 Difference]: With dead ends: 256 [2020-10-16 12:32:51,778 INFO L226 Difference]: Without dead ends: 0 [2020-10-16 12:32:51,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 12:32:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-16 12:32:51,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-16 12:32:51,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-16 12:32:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-16 12:32:51,779 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-16 12:32:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:32:51,779 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-16 12:32:51,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:32:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-16 12:32:51,779 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-16 12:32:51,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-16 12:32:51,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 12:32:51 BasicIcfg [2020-10-16 12:32:51,984 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 12:32:51,986 INFO L168 Benchmark]: Toolchain (without parser) took 134632.94 ms. Allocated memory was 139.5 MB in the beginning and 593.0 MB in the end (delta: 453.5 MB). Free memory was 100.2 MB in the beginning and 99.5 MB in the end (delta: 721.6 kB). Peak memory consumption was 454.2 MB. Max. memory is 7.1 GB. [2020-10-16 12:32:51,987 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-10-16 12:32:51,987 INFO L168 Benchmark]: CACSL2BoogieTranslator took 725.26 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 99.8 MB in the beginning and 162.3 MB in the end (delta: -62.5 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-10-16 12:32:51,987 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.35 ms. Allocated memory is still 202.4 MB. Free memory was 162.3 MB in the beginning and 160.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-16 12:32:51,988 INFO L168 Benchmark]: Boogie Preprocessor took 28.24 ms. Allocated memory is still 202.4 MB. Free memory was 160.4 MB in the beginning and 159.4 MB in the end (delta: 971.5 kB). Peak memory consumption was 971.5 kB. Max. memory is 7.1 GB. [2020-10-16 12:32:51,988 INFO L168 Benchmark]: RCFGBuilder took 376.59 ms. Allocated memory is still 202.4 MB. Free memory was 159.4 MB in the beginning and 138.6 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-10-16 12:32:51,989 INFO L168 Benchmark]: TraceAbstraction took 133454.72 ms. Allocated memory was 202.4 MB in the beginning and 593.0 MB in the end (delta: 390.6 MB). Free memory was 138.6 MB in the beginning and 99.5 MB in the end (delta: 39.1 MB). Peak memory consumption was 429.7 MB. Max. memory is 7.1 GB. [2020-10-16 12:32:51,990 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 725.26 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 99.8 MB in the beginning and 162.3 MB in the end (delta: -62.5 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.35 ms. Allocated memory is still 202.4 MB. Free memory was 162.3 MB in the beginning and 160.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.24 ms. Allocated memory is still 202.4 MB. Free memory was 160.4 MB in the beginning and 159.4 MB in the end (delta: 971.5 kB). Peak memory consumption was 971.5 kB. Max. memory is 7.1 GB. * RCFGBuilder took 376.59 ms. Allocated memory is still 202.4 MB. Free memory was 159.4 MB in the beginning and 138.6 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 133454.72 ms. Allocated memory was 202.4 MB in the beginning and 593.0 MB in the end (delta: 390.6 MB). Free memory was 138.6 MB in the beginning and 99.5 MB in the end (delta: 39.1 MB). Peak memory consumption was 429.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 488 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 133.3s, OverallIterations: 113, TraceHistogramMax: 11, AutomataDifference: 72.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 1674 SDtfs, 6701 SDslu, 11584 SDs, 0 SdLazy, 12732 SolverSat, 8213 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7265 GetRequests, 2756 SyntacticMatches, 139 SemanticMatches, 4370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47331 ImplicationChecksByTransitivity, 75.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 113 MinimizatonAttempts, 2865 StatesRemovedByMinimization, 110 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 22.3s InterpolantComputationTime, 4832 NumberOfCodeBlocks, 4832 NumberOfCodeBlocksAsserted, 600 NumberOfCheckSat, 4609 ConstructedInterpolants, 0 QuantifiedInterpolants, 458917 SizeOfPredicates, 1482 NumberOfNonLiveVariables, 14660 ConjunctsInSsa, 1938 ConjunctsInUnsatCore, 223 InterpolantComputations, 5 PerfectInterpolantSequences, 290/10300 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...