/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-15 13:40:33,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 13:40:33,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 13:40:33,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 13:40:33,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 13:40:33,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 13:40:33,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 13:40:33,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 13:40:33,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 13:40:33,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 13:40:33,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 13:40:33,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 13:40:33,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 13:40:33,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 13:40:33,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 13:40:33,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 13:40:33,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 13:40:33,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 13:40:33,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 13:40:33,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 13:40:33,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 13:40:33,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 13:40:33,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 13:40:33,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 13:40:33,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-15 13:40:33,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-15 13:40:33,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-15 13:40:33,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-15 13:40:33,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-15 13:40:33,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-15 13:40:33,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-15 13:40:33,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-15 13:40:33,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-15 13:40:33,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 13:40:33,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 13:40:33,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 13:40:33,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-15 13:40:33,255 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 13:40:33,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 13:40:33,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 13:40:33,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 13:40:33,261 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 13:40:33,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 13:40:33,261 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 13:40:33,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 13:40:33,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 13:40:33,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 13:40:33,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 13:40:33,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 13:40:33,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 13:40:33,264 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 13:40:33,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 13:40:33,264 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 13:40:33,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 13:40:33,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 13:40:33,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 13:40:33,266 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 13:40:33,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 13:40:33,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 13:40:33,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 13:40:33,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-15 13:40:33,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 13:40:33,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 13:40:33,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 13:40:33,268 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-15 13:40:33,269 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-15 13:40:33,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 13:40:33,269 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-15 13:40:33,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 13:40:33,768 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 13:40:33,772 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 13:40:33,774 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 13:40:33,774 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 13:40:33,776 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-09-15 13:40:33,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c5415cbc/c608c76e63cb4874b961db970b3e0d11/FLAG295a5a380 [2020-09-15 13:40:34,469 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 13:40:34,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-1.i [2020-09-15 13:40:34,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c5415cbc/c608c76e63cb4874b961db970b3e0d11/FLAG295a5a380 [2020-09-15 13:40:34,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c5415cbc/c608c76e63cb4874b961db970b3e0d11 [2020-09-15 13:40:34,743 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 13:40:34,748 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 13:40:34,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 13:40:34,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 13:40:34,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 13:40:34,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:40:34" (1/1) ... [2020-09-15 13:40:34,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c8daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:40:34, skipping insertion in model container [2020-09-15 13:40:34,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:40:34" (1/1) ... [2020-09-15 13:40:34,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 13:40:34,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 13:40:35,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 13:40:35,441 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 13:40:35,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 13:40:35,595 INFO L208 MainTranslator]: Completed translation [2020-09-15 13:40:35,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:40:35 WrapperNode [2020-09-15 13:40:35,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 13:40:35,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 13:40:35,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 13:40:35,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 13:40:35,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:40:35" (1/1) ... [2020-09-15 13:40:35,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:40:35" (1/1) ... [2020-09-15 13:40:35,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 13:40:35,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 13:40:35,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 13:40:35,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 13:40:35,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:40:35" (1/1) ... [2020-09-15 13:40:35,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:40:35" (1/1) ... [2020-09-15 13:40:35,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:40:35" (1/1) ... [2020-09-15 13:40:35,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:40:35" (1/1) ... [2020-09-15 13:40:35,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:40:35" (1/1) ... [2020-09-15 13:40:35,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:40:35" (1/1) ... [2020-09-15 13:40:35,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:40:35" (1/1) ... [2020-09-15 13:40:35,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 13:40:35,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 13:40:35,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 13:40:35,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 13:40:35,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:40:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 13:40:35,777 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-15 13:40:35,777 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-15 13:40:35,777 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-15 13:40:35,778 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-15 13:40:35,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 13:40:35,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-15 13:40:35,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 13:40:35,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 13:40:35,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-15 13:40:35,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 13:40:35,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 13:40:35,782 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-15 13:40:36,251 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 13:40:36,251 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-15 13:40:36,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:40:36 BoogieIcfgContainer [2020-09-15 13:40:36,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 13:40:36,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 13:40:36,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 13:40:36,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 13:40:36,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 01:40:34" (1/3) ... [2020-09-15 13:40:36,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a43f617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:40:36, skipping insertion in model container [2020-09-15 13:40:36,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:40:35" (2/3) ... [2020-09-15 13:40:36,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a43f617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:40:36, skipping insertion in model container [2020-09-15 13:40:36,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:40:36" (3/3) ... [2020-09-15 13:40:36,270 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-09-15 13:40:36,285 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 13:40:36,285 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-15 13:40:36,298 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 13:40:36,300 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 13:40:36,334 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,335 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,335 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,335 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,336 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,336 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,337 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,337 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,337 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,338 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,338 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,338 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,338 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,339 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,339 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,340 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,340 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,340 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,341 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,341 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,341 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,342 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,342 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,342 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,342 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,343 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,343 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,343 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,349 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,349 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,350 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,350 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,350 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,350 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,359 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,359 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,360 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,360 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,360 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:40:36,389 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-15 13:40:36,421 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 13:40:36,421 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 13:40:36,421 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 13:40:36,422 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-15 13:40:36,422 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 13:40:36,422 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 13:40:36,422 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 13:40:36,422 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 13:40:36,443 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-15 13:40:36,446 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 13:40:36,498 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 13:40:36,499 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 13:40:36,507 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-15 13:40:36,510 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 13:40:36,531 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 13:40:36,531 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 13:40:36,532 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-15 13:40:36,535 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-15 13:40:36,536 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 13:40:37,694 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-15 13:40:37,915 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-15 13:40:37,916 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-15 13:40:37,921 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-15 13:40:37,935 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-15 13:40:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-15 13:40:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-15 13:40:37,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:37,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-15 13:40:37,948 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:37,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:37,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-15 13:40:37,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:37,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352886873] [2020-09-15 13:40:37,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:38,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352886873] [2020-09-15 13:40:38,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:40:38,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-15 13:40:38,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1009050313] [2020-09-15 13:40:38,274 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:38,277 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:38,294 INFO L274 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-09-15 13:40:38,294 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:38,297 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-15 13:40:38,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-15 13:40:38,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:38,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-15 13:40:38,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-15 13:40:38,322 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-15 13:40:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:38,404 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-15 13:40:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-15 13:40:38,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-15 13:40:38,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:38,425 INFO L225 Difference]: With dead ends: 75 [2020-09-15 13:40:38,426 INFO L226 Difference]: Without dead ends: 42 [2020-09-15 13:40:38,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:40:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-15 13:40:38,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-15 13:40:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:40:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-15 13:40:38,482 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-15 13:40:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:38,483 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-15 13:40:38,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-15 13:40:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-15 13:40:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 13:40:38,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:38,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:38,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 13:40:38,485 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:38,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-15 13:40:38,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:38,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016828380] [2020-09-15 13:40:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:38,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016828380] [2020-09-15 13:40:38,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:40:38,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:40:38,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1832812214] [2020-09-15 13:40:38,594 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:38,595 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:38,598 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-09-15 13:40:38,598 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:38,625 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-15 13:40:38,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:40:38,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:38,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:40:38,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:40:38,628 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-15 13:40:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:38,666 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-15 13:40:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-15 13:40:38,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-15 13:40:38,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:38,668 INFO L225 Difference]: With dead ends: 56 [2020-09-15 13:40:38,668 INFO L226 Difference]: Without dead ends: 50 [2020-09-15 13:40:38,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-15 13:40:38,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-15 13:40:38,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-15 13:40:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:40:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-15 13:40:38,679 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-15 13:40:38,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:38,681 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-15 13:40:38,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:40:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-15 13:40:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 13:40:38,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:38,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:38,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-15 13:40:38,683 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:38,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:38,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-15 13:40:38,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:38,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214669103] [2020-09-15 13:40:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:38,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214669103] [2020-09-15 13:40:38,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:40:38,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 13:40:38,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [475570446] [2020-09-15 13:40:38,846 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:38,848 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:38,856 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-09-15 13:40:38,857 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:38,868 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:38,869 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:38,938 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:40:38,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:40:38,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:38,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:40:38,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:40:38,940 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-09-15 13:40:39,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:39,094 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-09-15 13:40:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 13:40:39,095 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-09-15 13:40:39,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:39,096 INFO L225 Difference]: With dead ends: 62 [2020-09-15 13:40:39,096 INFO L226 Difference]: Without dead ends: 44 [2020-09-15 13:40:39,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:40:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-15 13:40:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-09-15 13:40:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-15 13:40:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-15 13:40:39,104 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-09-15 13:40:39,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:39,105 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-15 13:40:39,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:40:39,105 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-15 13:40:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 13:40:39,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:39,106 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:39,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-15 13:40:39,107 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:39,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:39,107 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-09-15 13:40:39,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:39,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164238507] [2020-09-15 13:40:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:39,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164238507] [2020-09-15 13:40:39,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574751412] [2020-09-15 13:40:39,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:39,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:40:39,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:39,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:40:39,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:39,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:39,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 13:40:39,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1965462288] [2020-09-15 13:40:39,344 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:39,346 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:39,348 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-09-15 13:40:39,349 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:39,351 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:39,351 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:39,388 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:39,388 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:39,412 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:39,412 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:39,431 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:39,432 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:39,443 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:39,444 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:39,453 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:39,453 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:39,473 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:39,473 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:39,491 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:39,492 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:39,504 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-09-15 13:40:39,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 13:40:39,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:39,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 13:40:39,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-15 13:40:39,506 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-09-15 13:40:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:39,691 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-09-15 13:40:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 13:40:39,691 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 13:40:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:39,692 INFO L225 Difference]: With dead ends: 56 [2020-09-15 13:40:39,693 INFO L226 Difference]: Without dead ends: 50 [2020-09-15 13:40:39,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:40:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-15 13:40:39,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-15 13:40:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:40:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-09-15 13:40:39,711 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-09-15 13:40:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:39,711 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-09-15 13:40:39,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 13:40:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-09-15 13:40:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 13:40:39,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:39,715 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:39,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:39,924 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:39,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:39,925 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-09-15 13:40:39,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:39,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600782767] [2020-09-15 13:40:39,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:40,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600782767] [2020-09-15 13:40:40,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924516957] [2020-09-15 13:40:40,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:40,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 13:40:40,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:40,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:40:40,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:40,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:40,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 13:40:40,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [938056157] [2020-09-15 13:40:40,168 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:40,169 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:40,172 INFO L274 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-09-15 13:40:40,172 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:40,176 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:40,177 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:40,235 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:40,236 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:40,272 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-09-15 13:40:40,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 13:40:40,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:40,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 13:40:40,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-15 13:40:40,276 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-09-15 13:40:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:40,533 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-09-15 13:40:40,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 13:40:40,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 13:40:40,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:40,535 INFO L225 Difference]: With dead ends: 66 [2020-09-15 13:40:40,536 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 13:40:40,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:40:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 13:40:40,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-09-15 13:40:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-15 13:40:40,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-09-15 13:40:40,543 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-09-15 13:40:40,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:40,543 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-09-15 13:40:40,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 13:40:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-09-15 13:40:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 13:40:40,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:40,544 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:40,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:40,757 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:40,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:40,758 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-09-15 13:40:40,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:40,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572963727] [2020-09-15 13:40:40,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:40,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572963727] [2020-09-15 13:40:40,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470216820] [2020-09-15 13:40:40,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:40,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:40:40,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:40,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 13:40:40,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:40,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:40,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 13:40:40,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1522072631] [2020-09-15 13:40:40,952 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:40,953 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:40,956 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-09-15 13:40:40,956 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:40,961 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:40,961 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:41,006 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:41,007 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:41,024 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:40:41,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:40:41,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:41,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:40:41,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:40:41,026 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-09-15 13:40:41,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:41,237 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-09-15 13:40:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 13:40:41,240 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 13:40:41,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:41,246 INFO L225 Difference]: With dead ends: 64 [2020-09-15 13:40:41,247 INFO L226 Difference]: Without dead ends: 58 [2020-09-15 13:40:41,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:40:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-15 13:40:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-15 13:40:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-15 13:40:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-09-15 13:40:41,263 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-09-15 13:40:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:41,263 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-09-15 13:40:41,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:40:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-09-15 13:40:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 13:40:41,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:41,265 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:41,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:41,479 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:41,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-09-15 13:40:41,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:41,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218671025] [2020-09-15 13:40:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:41,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218671025] [2020-09-15 13:40:41,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228244863] [2020-09-15 13:40:41,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:41,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:40:41,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:41,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 13:40:41,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:41,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:41,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 13:40:41,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [523160711] [2020-09-15 13:40:41,644 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:41,645 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:41,647 INFO L274 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-09-15 13:40:41,647 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:41,649 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:41,649 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:41,684 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:41,685 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:41,701 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-15 13:40:41,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:40:41,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:41,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:40:41,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:40:41,702 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-09-15 13:40:41,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:41,956 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-09-15 13:40:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 13:40:41,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 13:40:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:41,958 INFO L225 Difference]: With dead ends: 63 [2020-09-15 13:40:41,958 INFO L226 Difference]: Without dead ends: 51 [2020-09-15 13:40:41,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:40:41,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-15 13:40:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-09-15 13:40:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-15 13:40:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-15 13:40:41,965 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-09-15 13:40:41,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:41,965 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-15 13:40:41,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:40:41,965 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-15 13:40:41,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:40:41,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:41,966 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:42,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:42,176 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:42,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:42,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-09-15 13:40:42,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:42,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158747364] [2020-09-15 13:40:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:42,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158747364] [2020-09-15 13:40:42,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539187487] [2020-09-15 13:40:42,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:42,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 13:40:42,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:42,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:40:42,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:42,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:42,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 13:40:42,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [575979413] [2020-09-15 13:40:42,385 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:42,387 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:42,391 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-09-15 13:40:42,392 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:42,393 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:42,394 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:42,424 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:42,425 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:42,448 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:42,448 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:42,458 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:42,459 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:42,471 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:42,471 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:42,479 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:42,479 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:42,505 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:42,505 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:42,512 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:42,513 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:42,525 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-09-15 13:40:42,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 13:40:42,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:42,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 13:40:42,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 13:40:42,527 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-09-15 13:40:42,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:42,753 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-09-15 13:40:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:40:42,753 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 13:40:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:42,754 INFO L225 Difference]: With dead ends: 60 [2020-09-15 13:40:42,754 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 13:40:42,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:40:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 13:40:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-15 13:40:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 13:40:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-15 13:40:42,761 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-09-15 13:40:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:42,761 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-15 13:40:42,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 13:40:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-15 13:40:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:40:42,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:42,763 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:42,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:42,975 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:42,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:42,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-09-15 13:40:42,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:42,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529921969] [2020-09-15 13:40:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:43,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529921969] [2020-09-15 13:40:43,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007164140] [2020-09-15 13:40:43,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:43,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:40:43,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:43,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:43,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 13:40:43,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1229678758] [2020-09-15 13:40:43,203 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:43,207 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:43,211 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-15 13:40:43,211 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:43,215 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:43,215 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:43,252 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:43,253 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:43,269 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-09-15 13:40:43,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 13:40:43,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:43,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 13:40:43,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-15 13:40:43,270 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-09-15 13:40:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:43,550 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-15 13:40:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:40:43,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 13:40:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:43,551 INFO L225 Difference]: With dead ends: 74 [2020-09-15 13:40:43,552 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 13:40:43,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:40:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 13:40:43,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-15 13:40:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-15 13:40:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-09-15 13:40:43,558 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-09-15 13:40:43,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:43,559 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-09-15 13:40:43,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 13:40:43,559 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-09-15 13:40:43,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:40:43,560 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:43,560 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:43,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:43,774 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:43,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:43,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-09-15 13:40:43,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:43,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768775322] [2020-09-15 13:40:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:43,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768775322] [2020-09-15 13:40:43,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164950668] [2020-09-15 13:40:43,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:43,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:40:43,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:43,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:40:43,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:43,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:43,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 13:40:43,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [931869224] [2020-09-15 13:40:43,946 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:43,947 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:43,953 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-15 13:40:43,954 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:43,957 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:43,959 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:43,990 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:43,991 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:44,001 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:40:44,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 13:40:44,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:44,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 13:40:44,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-15 13:40:44,003 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-09-15 13:40:44,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:44,348 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-09-15 13:40:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 13:40:44,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 13:40:44,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:44,350 INFO L225 Difference]: With dead ends: 74 [2020-09-15 13:40:44,350 INFO L226 Difference]: Without dead ends: 62 [2020-09-15 13:40:44,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:40:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-15 13:40:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-09-15 13:40:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:40:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-15 13:40:44,355 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-09-15 13:40:44,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:44,356 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-15 13:40:44,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 13:40:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-15 13:40:44,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 13:40:44,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:44,357 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:44,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-15 13:40:44,571 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:44,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:44,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-09-15 13:40:44,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:44,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587428136] [2020-09-15 13:40:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:44,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587428136] [2020-09-15 13:40:44,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759956121] [2020-09-15 13:40:44,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:44,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 13:40:44,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:44,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 13:40:44,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:44,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:44,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 13:40:44,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [332717738] [2020-09-15 13:40:44,790 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:44,791 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:44,794 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-09-15 13:40:44,794 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:44,800 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:44,800 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:44,840 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:44,841 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:44,855 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:40:44,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:40:44,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:44,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:40:44,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:40:44,857 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-09-15 13:40:45,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:45,108 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-09-15 13:40:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:40:45,109 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 13:40:45,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:45,110 INFO L225 Difference]: With dead ends: 70 [2020-09-15 13:40:45,110 INFO L226 Difference]: Without dead ends: 64 [2020-09-15 13:40:45,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:40:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-15 13:40:45,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-09-15 13:40:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-15 13:40:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-09-15 13:40:45,115 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-09-15 13:40:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:45,115 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-09-15 13:40:45,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:40:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-09-15 13:40:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 13:40:45,116 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:45,117 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:45,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-15 13:40:45,328 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:45,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-09-15 13:40:45,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:45,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891068703] [2020-09-15 13:40:45,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:45,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891068703] [2020-09-15 13:40:45,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461133136] [2020-09-15 13:40:45,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:45,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:40:45,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:45,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 13:40:45,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:45,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:45,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 13:40:45,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2035627396] [2020-09-15 13:40:45,616 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:45,619 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:45,623 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-15 13:40:45,623 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:45,633 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:45,634 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:45,682 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:45,682 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:45,700 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-15 13:40:45,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:40:45,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:45,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:40:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:40:45,702 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-09-15 13:40:46,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:46,021 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-15 13:40:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:40:46,022 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 13:40:46,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:46,023 INFO L225 Difference]: With dead ends: 69 [2020-09-15 13:40:46,024 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 13:40:46,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:40:46,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 13:40:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-09-15 13:40:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 13:40:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-09-15 13:40:46,042 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-09-15 13:40:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:46,043 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-09-15 13:40:46,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:40:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-09-15 13:40:46,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 13:40:46,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:46,044 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:46,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:46,260 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:46,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-09-15 13:40:46,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:46,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774854861] [2020-09-15 13:40:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:46,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774854861] [2020-09-15 13:40:46,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650611751] [2020-09-15 13:40:46,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:46,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 13:40:46,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:46,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 13:40:46,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:46,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:46,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 13:40:46,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [312039775] [2020-09-15 13:40:46,484 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:46,486 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:46,489 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-15 13:40:46,489 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:46,493 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:46,493 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:46,529 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:46,530 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:46,545 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-09-15 13:40:46,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:40:46,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:46,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:40:46,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:40:46,547 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-09-15 13:40:46,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:46,925 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-09-15 13:40:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 13:40:46,926 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 13:40:46,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:46,928 INFO L225 Difference]: With dead ends: 69 [2020-09-15 13:40:46,928 INFO L226 Difference]: Without dead ends: 57 [2020-09-15 13:40:46,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:40:46,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-15 13:40:46,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-09-15 13:40:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:40:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-15 13:40:46,933 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-09-15 13:40:46,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:46,933 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-15 13:40:46,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:40:46,934 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-15 13:40:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:40:46,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:46,935 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:47,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:47,147 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:47,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:47,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-09-15 13:40:47,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:47,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754761710] [2020-09-15 13:40:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:47,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754761710] [2020-09-15 13:40:47,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766969388] [2020-09-15 13:40:47,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:47,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 13:40:47,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:47,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:40:47,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:47,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:47,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 13:40:47,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1059249727] [2020-09-15 13:40:47,366 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:47,368 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:47,371 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-09-15 13:40:47,371 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:47,373 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:47,373 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:47,412 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:47,412 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:47,434 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:47,434 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:47,439 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:47,440 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:47,451 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:47,451 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:47,464 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:47,465 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:47,484 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:47,485 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:47,493 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:47,493 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:47,504 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-09-15 13:40:47,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:40:47,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:40:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:40:47,506 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-09-15 13:40:47,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:47,784 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-09-15 13:40:47,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:40:47,785 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:40:47,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:47,785 INFO L225 Difference]: With dead ends: 66 [2020-09-15 13:40:47,786 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 13:40:47,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:40:47,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 13:40:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-15 13:40:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 13:40:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-15 13:40:47,790 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-09-15 13:40:47,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:47,791 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-15 13:40:47,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:40:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-15 13:40:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:40:47,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:47,792 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:47,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-15 13:40:47,993 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:47,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:47,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-09-15 13:40:47,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:47,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553113604] [2020-09-15 13:40:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:48,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553113604] [2020-09-15 13:40:48,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397879670] [2020-09-15 13:40:48,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:48,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:40:48,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:48,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:48,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 13:40:48,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1257304341] [2020-09-15 13:40:48,226 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:48,228 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:48,230 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-15 13:40:48,231 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:48,237 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:48,237 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:48,266 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:48,266 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:48,280 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-09-15 13:40:48,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:40:48,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:48,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:40:48,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:40:48,282 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-09-15 13:40:48,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:48,629 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-09-15 13:40:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:40:48,629 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:40:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:48,630 INFO L225 Difference]: With dead ends: 82 [2020-09-15 13:40:48,630 INFO L226 Difference]: Without dead ends: 76 [2020-09-15 13:40:48,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:40:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-15 13:40:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-15 13:40:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 13:40:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-09-15 13:40:48,640 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-09-15 13:40:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:48,640 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-09-15 13:40:48,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:40:48,640 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-09-15 13:40:48,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:40:48,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:48,641 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:48,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-15 13:40:48,842 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:48,843 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-09-15 13:40:48,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:48,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157560867] [2020-09-15 13:40:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:48,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157560867] [2020-09-15 13:40:48,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717882008] [2020-09-15 13:40:48,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:49,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:40:49,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:40:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:49,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:49,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 13:40:49,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [836606913] [2020-09-15 13:40:49,026 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:49,028 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:49,030 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-15 13:40:49,030 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:49,032 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:49,032 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:49,062 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:49,062 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:49,073 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:40:49,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:40:49,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:49,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:40:49,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:40:49,075 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-09-15 13:40:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:49,468 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-15 13:40:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:40:49,469 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:40:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:49,470 INFO L225 Difference]: With dead ends: 81 [2020-09-15 13:40:49,470 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 13:40:49,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-15 13:40:49,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 13:40:49,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-15 13:40:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 13:40:49,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-09-15 13:40:49,475 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-09-15 13:40:49,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:49,476 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-09-15 13:40:49,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:40:49,476 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-09-15 13:40:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:40:49,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:49,477 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:49,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-15 13:40:49,689 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-09-15 13:40:49,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:49,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587313392] [2020-09-15 13:40:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:49,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587313392] [2020-09-15 13:40:49,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438912423] [2020-09-15 13:40:49,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:49,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 13:40:49,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:49,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:40:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:49,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:49,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 13:40:49,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1271896540] [2020-09-15 13:40:49,919 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:49,921 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:49,924 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-15 13:40:49,924 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:49,927 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:49,928 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:49,963 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:49,964 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:49,976 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-15 13:40:49,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:40:49,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:49,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:40:49,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:40:49,977 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-09-15 13:40:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:50,451 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-09-15 13:40:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 13:40:50,451 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:40:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:50,452 INFO L225 Difference]: With dead ends: 82 [2020-09-15 13:40:50,452 INFO L226 Difference]: Without dead ends: 70 [2020-09-15 13:40:50,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:40:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-15 13:40:50,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-09-15 13:40:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 13:40:50,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-15 13:40:50,456 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-09-15 13:40:50,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:50,457 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-15 13:40:50,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:40:50,457 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-15 13:40:50,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 13:40:50,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:50,458 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:50,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:50,668 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:50,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:50,668 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-09-15 13:40:50,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:50,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508482970] [2020-09-15 13:40:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:50,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508482970] [2020-09-15 13:40:50,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31804408] [2020-09-15 13:40:50,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:50,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:40:50,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:50,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:40:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:50,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:50,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 13:40:50,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1370116226] [2020-09-15 13:40:50,950 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:50,952 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:50,957 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-09-15 13:40:50,958 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:50,959 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:50,960 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:50,998 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:50,998 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:51,012 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:40:51,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:40:51,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:51,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:40:51,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:40:51,014 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-09-15 13:40:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:51,287 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-15 13:40:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:40:51,288 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 13:40:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:51,289 INFO L225 Difference]: With dead ends: 78 [2020-09-15 13:40:51,289 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 13:40:51,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:40:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 13:40:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-09-15 13:40:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-15 13:40:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-09-15 13:40:51,293 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-09-15 13:40:51,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:51,293 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-09-15 13:40:51,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:40:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-09-15 13:40:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 13:40:51,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:51,294 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:51,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 13:40:51,503 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:51,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:51,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-09-15 13:40:51,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:51,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486063606] [2020-09-15 13:40:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:51,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486063606] [2020-09-15 13:40:51,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129200750] [2020-09-15 13:40:51,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:51,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 13:40:51,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:51,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:40:51,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:51,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:51,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 13:40:51,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [620297477] [2020-09-15 13:40:51,756 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:51,758 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:51,762 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-15 13:40:51,763 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:51,766 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:51,766 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:51,805 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:51,806 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:51,818 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-15 13:40:51,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:40:51,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:51,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:40:51,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:40:51,820 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-09-15 13:40:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:52,196 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-09-15 13:40:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:40:52,198 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 13:40:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:52,199 INFO L225 Difference]: With dead ends: 75 [2020-09-15 13:40:52,199 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 13:40:52,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-15 13:40:52,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 13:40:52,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-15 13:40:52,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-15 13:40:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-15 13:40:52,204 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-09-15 13:40:52,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:52,205 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-15 13:40:52,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:40:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-15 13:40:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 13:40:52,206 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:52,206 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:52,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:52,419 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:52,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:52,419 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-09-15 13:40:52,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:52,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065643189] [2020-09-15 13:40:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:52,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065643189] [2020-09-15 13:40:52,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882729072] [2020-09-15 13:40:52,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:52,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 13:40:52,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:52,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:40:52,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:52,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:52,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 13:40:52,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [349304875] [2020-09-15 13:40:52,637 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:52,639 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:52,644 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-15 13:40:52,644 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:52,648 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:52,648 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:52,701 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:52,702 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:52,720 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-09-15 13:40:52,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:40:52,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:52,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:40:52,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:40:52,722 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-09-15 13:40:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:53,266 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-09-15 13:40:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:40:53,267 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 13:40:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:53,268 INFO L225 Difference]: With dead ends: 75 [2020-09-15 13:40:53,268 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 13:40:53,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:40:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 13:40:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-09-15 13:40:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 13:40:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-09-15 13:40:53,279 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-09-15 13:40:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:53,279 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-09-15 13:40:53,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:40:53,280 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-09-15 13:40:53,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 13:40:53,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:53,281 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:53,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:53,494 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:53,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:53,495 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-09-15 13:40:53,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:53,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484924115] [2020-09-15 13:40:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:53,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484924115] [2020-09-15 13:40:53,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279957881] [2020-09-15 13:40:53,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:53,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:40:53,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:53,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:53,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 13:40:53,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [688362673] [2020-09-15 13:40:53,716 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:53,717 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:53,721 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-15 13:40:53,722 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:53,723 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:53,724 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:53,787 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:53,787 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:53,804 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (<= ~j~0 14) (<= ~i~0 16))] [2020-09-15 13:40:53,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:40:53,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:53,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:40:53,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:40:53,805 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-09-15 13:40:54,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:54,295 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-09-15 13:40:54,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 13:40:54,296 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 13:40:54,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:54,297 INFO L225 Difference]: With dead ends: 75 [2020-09-15 13:40:54,297 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 13:40:54,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:40:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 13:40:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-15 13:40:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 13:40:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-15 13:40:54,301 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-09-15 13:40:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:54,302 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-15 13:40:54,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:40:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-15 13:40:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:40:54,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:54,302 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:54,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-15 13:40:54,513 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:54,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:54,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-09-15 13:40:54,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:54,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546130592] [2020-09-15 13:40:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:54,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546130592] [2020-09-15 13:40:54,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135155077] [2020-09-15 13:40:54,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:54,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:40:54,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:54,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:40:54,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:54,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:54,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:40:54,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [104064715] [2020-09-15 13:40:54,794 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:54,796 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:54,800 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-09-15 13:40:54,800 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:54,801 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:54,802 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:54,834 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:54,834 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:54,854 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:54,854 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:54,863 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:54,863 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:54,871 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:54,872 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:54,880 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:54,881 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:54,902 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:54,902 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:54,911 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:54,911 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:54,918 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-09-15 13:40:54,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:40:54,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:54,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:40:54,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:40:54,920 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-09-15 13:40:55,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:55,250 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-09-15 13:40:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:40:55,251 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:40:55,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:55,252 INFO L225 Difference]: With dead ends: 72 [2020-09-15 13:40:55,252 INFO L226 Difference]: Without dead ends: 66 [2020-09-15 13:40:55,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:40:55,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-15 13:40:55,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-15 13:40:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 13:40:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-15 13:40:55,256 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-09-15 13:40:55,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:55,256 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-15 13:40:55,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:40:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-15 13:40:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:40:55,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:55,257 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:55,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:55,466 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:55,467 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-09-15 13:40:55,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:55,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254538509] [2020-09-15 13:40:55,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:55,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254538509] [2020-09-15 13:40:55,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008240485] [2020-09-15 13:40:55,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:55,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 13:40:55,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:40:55,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:55,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:55,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:40:55,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [482506931] [2020-09-15 13:40:55,719 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:55,721 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:55,725 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-15 13:40:55,726 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:55,730 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:55,731 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:55,818 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:55,819 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:55,837 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-09-15 13:40:55,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:40:55,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:55,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:40:55,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:40:55,838 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-09-15 13:40:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:56,282 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-09-15 13:40:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:40:56,283 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:40:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:56,283 INFO L225 Difference]: With dead ends: 92 [2020-09-15 13:40:56,284 INFO L226 Difference]: Without dead ends: 86 [2020-09-15 13:40:56,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:40:56,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-15 13:40:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-09-15 13:40:56,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 13:40:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-09-15 13:40:56,290 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-09-15 13:40:56,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:56,290 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-09-15 13:40:56,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:40:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-09-15 13:40:56,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:40:56,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:56,291 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:56,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-15 13:40:56,501 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:56,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:56,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-09-15 13:40:56,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:56,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308064868] [2020-09-15 13:40:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:56,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308064868] [2020-09-15 13:40:56,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256607743] [2020-09-15 13:40:56,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:56,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:40:56,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:40:56,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:56,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:56,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:40:56,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1858695160] [2020-09-15 13:40:56,722 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:56,724 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:56,727 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-15 13:40:56,727 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:56,735 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:56,735 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:56,773 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:56,773 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:56,784 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:40:56,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:40:56,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:56,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:40:56,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:40:56,785 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-09-15 13:40:57,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:57,278 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-09-15 13:40:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 13:40:57,279 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:40:57,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:57,280 INFO L225 Difference]: With dead ends: 89 [2020-09-15 13:40:57,280 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 13:40:57,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:40:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 13:40:57,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-09-15 13:40:57,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 13:40:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-09-15 13:40:57,284 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-09-15 13:40:57,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:57,284 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-09-15 13:40:57,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:40:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-09-15 13:40:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:40:57,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:57,285 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:57,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-15 13:40:57,486 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:57,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-09-15 13:40:57,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:57,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460637926] [2020-09-15 13:40:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:57,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460637926] [2020-09-15 13:40:57,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709852028] [2020-09-15 13:40:57,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:57,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 13:40:57,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:57,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:40:57,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:57,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:57,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:40:57,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1408015443] [2020-09-15 13:40:57,709 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:57,711 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:57,715 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-15 13:40:57,715 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:57,716 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:57,717 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:57,750 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:57,750 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:57,763 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-15 13:40:57,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:40:57,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:57,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:40:57,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:40:57,764 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-09-15 13:40:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:58,351 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-09-15 13:40:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 13:40:58,352 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:40:58,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:58,353 INFO L225 Difference]: With dead ends: 89 [2020-09-15 13:40:58,353 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 13:40:58,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:40:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 13:40:58,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-15 13:40:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 13:40:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-09-15 13:40:58,359 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-09-15 13:40:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:58,359 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-09-15 13:40:58,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:40:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-09-15 13:40:58,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:40:58,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:58,360 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:58,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:58,569 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:58,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-09-15 13:40:58,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:58,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335278559] [2020-09-15 13:40:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:58,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335278559] [2020-09-15 13:40:58,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416622575] [2020-09-15 13:40:58,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:58,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 13:40:58,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:40:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:40:58,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:58,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:58,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:40:58,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1060770957] [2020-09-15 13:40:58,819 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:58,820 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:58,823 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-15 13:40:58,824 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:58,825 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:58,825 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:58,868 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:58,868 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:58,879 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-09-15 13:40:58,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:40:58,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:40:58,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:40:58,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:40:58,880 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-09-15 13:40:59,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:40:59,485 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-09-15 13:40:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 13:40:59,486 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:40:59,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:40:59,487 INFO L225 Difference]: With dead ends: 90 [2020-09-15 13:40:59,487 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 13:40:59,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:40:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 13:40:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-09-15 13:40:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 13:40:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-15 13:40:59,492 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-09-15 13:40:59,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:40:59,493 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-15 13:40:59,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:40:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-15 13:40:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 13:40:59,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:40:59,494 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:40:59,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-15 13:40:59,695 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:40:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:40:59,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-09-15 13:40:59,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:40:59,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853347225] [2020-09-15 13:40:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:40:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:59,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853347225] [2020-09-15 13:40:59,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204177583] [2020-09-15 13:40:59,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:40:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:40:59,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 13:40:59,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:40:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:40:59,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:40:59,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 13:40:59,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1986096924] [2020-09-15 13:40:59,950 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:40:59,952 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:40:59,956 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-09-15 13:40:59,957 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:40:59,960 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:59,960 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:40:59,994 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:40:59,995 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:00,010 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6427#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:41:00,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 13:41:00,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:00,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 13:41:00,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:41:00,012 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 15 states. [2020-09-15 13:41:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:00,386 INFO L93 Difference]: Finished difference Result 86 states and 198 transitions. [2020-09-15 13:41:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:41:00,387 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 13:41:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:00,387 INFO L225 Difference]: With dead ends: 86 [2020-09-15 13:41:00,388 INFO L226 Difference]: Without dead ends: 80 [2020-09-15 13:41:00,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:41:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-15 13:41:00,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-15 13:41:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 13:41:00,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 140 transitions. [2020-09-15 13:41:00,391 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 140 transitions. Word has length 18 [2020-09-15 13:41:00,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:00,391 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 140 transitions. [2020-09-15 13:41:00,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 13:41:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 140 transitions. [2020-09-15 13:41:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 13:41:00,392 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:00,392 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:00,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:00,602 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:00,603 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 26 times [2020-09-15 13:41:00,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:00,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986873418] [2020-09-15 13:41:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:00,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986873418] [2020-09-15 13:41:00,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540358414] [2020-09-15 13:41:00,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:00,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:41:00,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:00,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 13:41:00,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:00,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:00,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 13:41:00,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2083960756] [2020-09-15 13:41:00,822 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:00,824 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:00,828 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-15 13:41:00,828 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:00,833 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:00,833 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:00,866 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:00,866 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:00,877 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6719#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-15 13:41:00,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 13:41:00,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 13:41:00,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:41:00,878 INFO L87 Difference]: Start difference. First operand 57 states and 140 transitions. Second operand 15 states. [2020-09-15 13:41:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:01,301 INFO L93 Difference]: Finished difference Result 83 states and 194 transitions. [2020-09-15 13:41:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:41:01,302 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 13:41:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:01,303 INFO L225 Difference]: With dead ends: 83 [2020-09-15 13:41:01,303 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 13:41:01,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:41:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 13:41:01,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-09-15 13:41:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-15 13:41:01,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 146 transitions. [2020-09-15 13:41:01,306 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 146 transitions. Word has length 18 [2020-09-15 13:41:01,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:01,307 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 146 transitions. [2020-09-15 13:41:01,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 13:41:01,307 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 146 transitions. [2020-09-15 13:41:01,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 13:41:01,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:01,307 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:01,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-15 13:41:01,516 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:01,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 27 times [2020-09-15 13:41:01,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:01,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928482489] [2020-09-15 13:41:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:01,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928482489] [2020-09-15 13:41:01,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301551450] [2020-09-15 13:41:01,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:01,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 13:41:01,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:01,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 13:41:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:01,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:01,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 13:41:01,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1142445992] [2020-09-15 13:41:01,766 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:01,768 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:01,773 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-15 13:41:01,773 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:01,774 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:01,774 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:01,814 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:01,814 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:01,829 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7016#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-09-15 13:41:01,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 13:41:01,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:01,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 13:41:01,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:41:01,831 INFO L87 Difference]: Start difference. First operand 59 states and 146 transitions. Second operand 15 states. [2020-09-15 13:41:02,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:02,298 INFO L93 Difference]: Finished difference Result 81 states and 192 transitions. [2020-09-15 13:41:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 13:41:02,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 13:41:02,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:02,299 INFO L225 Difference]: With dead ends: 81 [2020-09-15 13:41:02,300 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 13:41:02,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:41:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 13:41:02,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-09-15 13:41:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-15 13:41:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 152 transitions. [2020-09-15 13:41:02,303 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 152 transitions. Word has length 18 [2020-09-15 13:41:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:02,304 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 152 transitions. [2020-09-15 13:41:02,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 13:41:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 152 transitions. [2020-09-15 13:41:02,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 13:41:02,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:02,305 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:02,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-15 13:41:02,514 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:02,515 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 28 times [2020-09-15 13:41:02,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:02,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220205239] [2020-09-15 13:41:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:02,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220205239] [2020-09-15 13:41:02,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024325035] [2020-09-15 13:41:02,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:02,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:41:02,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:02,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 13:41:02,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:02,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:02,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 13:41:02,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1638314929] [2020-09-15 13:41:02,793 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:02,796 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:02,857 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-15 13:41:02,858 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:02,859 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:02,860 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:02,897 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:02,898 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:02,929 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7319#(and (<= ~j~0 14) (<= ~i~0 16))] [2020-09-15 13:41:02,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 13:41:02,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:02,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 13:41:02,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:41:02,931 INFO L87 Difference]: Start difference. First operand 61 states and 152 transitions. Second operand 15 states. [2020-09-15 13:41:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:03,526 INFO L93 Difference]: Finished difference Result 81 states and 195 transitions. [2020-09-15 13:41:03,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 13:41:03,527 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 13:41:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:03,528 INFO L225 Difference]: With dead ends: 81 [2020-09-15 13:41:03,528 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 13:41:03,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:41:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 13:41:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-09-15 13:41:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 13:41:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-09-15 13:41:03,532 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 18 [2020-09-15 13:41:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:03,533 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-09-15 13:41:03,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 13:41:03,533 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-09-15 13:41:03,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 13:41:03,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:03,534 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:03,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:03,735 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:03,736 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 29 times [2020-09-15 13:41:03,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:03,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104659977] [2020-09-15 13:41:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:03,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104659977] [2020-09-15 13:41:03,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908021010] [2020-09-15 13:41:03,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:03,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 13:41:03,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:03,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 13:41:03,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:03,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:03,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 13:41:03,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [808992126] [2020-09-15 13:41:03,969 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:03,971 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:03,974 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-15 13:41:03,974 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:03,975 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:03,976 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:04,015 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:04,015 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:04,033 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7630#(and (<= ~j~0 16) (<= ~i~0 16))] [2020-09-15 13:41:04,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 13:41:04,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:04,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 13:41:04,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:41:04,034 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 15 states. [2020-09-15 13:41:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:04,688 INFO L93 Difference]: Finished difference Result 79 states and 195 transitions. [2020-09-15 13:41:04,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 13:41:04,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 13:41:04,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:04,690 INFO L225 Difference]: With dead ends: 79 [2020-09-15 13:41:04,691 INFO L226 Difference]: Without dead ends: 70 [2020-09-15 13:41:04,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:41:04,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-15 13:41:04,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-15 13:41:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 13:41:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-15 13:41:04,695 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-15 13:41:04,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:04,695 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-15 13:41:04,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 13:41:04,696 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-15 13:41:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:41:04,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:04,696 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:04,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:04,907 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 30 times [2020-09-15 13:41:04,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:04,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751170349] [2020-09-15 13:41:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:05,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751170349] [2020-09-15 13:41:05,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237188364] [2020-09-15 13:41:05,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:05,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 13:41:05,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:05,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:41:05,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:05,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-15 13:41:05,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-09-15 13:41:05,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1468472120] [2020-09-15 13:41:05,145 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:05,147 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:05,152 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2020-09-15 13:41:05,152 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:05,178 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-15 13:41:05,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 13:41:05,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:05,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 13:41:05,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:41:05,180 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 8 states. [2020-09-15 13:41:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:05,197 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-09-15 13:41:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 13:41:05,197 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-15 13:41:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:05,198 INFO L225 Difference]: With dead ends: 151 [2020-09-15 13:41:05,198 INFO L226 Difference]: Without dead ends: 50 [2020-09-15 13:41:05,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:41:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-15 13:41:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-09-15 13:41:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 13:41:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-09-15 13:41:05,204 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-09-15 13:41:05,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:05,205 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-09-15 13:41:05,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 13:41:05,205 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-09-15 13:41:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:41:05,206 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:05,206 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:05,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-15 13:41:05,408 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:05,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 31 times [2020-09-15 13:41:05,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:05,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954026304] [2020-09-15 13:41:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:05,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954026304] [2020-09-15 13:41:05,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944486847] [2020-09-15 13:41:05,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:05,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:41:05,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:05,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-15 13:41:05,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-09-15 13:41:05,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [65179677] [2020-09-15 13:41:05,597 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:05,599 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:05,603 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2020-09-15 13:41:05,603 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:05,652 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-15 13:41:05,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 13:41:05,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:05,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 13:41:05,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:41:05,653 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand 8 states. [2020-09-15 13:41:05,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:05,665 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-09-15 13:41:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 13:41:05,667 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-15 13:41:05,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:05,667 INFO L225 Difference]: With dead ends: 86 [2020-09-15 13:41:05,667 INFO L226 Difference]: Without dead ends: 0 [2020-09-15 13:41:05,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:41:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-15 13:41:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-15 13:41:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-15 13:41:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-15 13:41:05,668 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-09-15 13:41:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:05,669 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-15 13:41:05,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 13:41:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-15 13:41:05,669 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-15 13:41:05,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:05,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 01:41:05 BasicIcfg [2020-09-15 13:41:05,878 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-15 13:41:05,880 INFO L168 Benchmark]: Toolchain (without parser) took 31135.42 ms. Allocated memory was 147.8 MB in the beginning and 427.8 MB in the end (delta: 280.0 MB). Free memory was 102.3 MB in the beginning and 374.7 MB in the end (delta: -272.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 7.1 GB. [2020-09-15 13:41:05,880 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-15 13:41:05,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 847.67 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 101.7 MB in the beginning and 164.7 MB in the end (delta: -63.0 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-09-15 13:41:05,881 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.69 ms. Allocated memory is still 204.5 MB. Free memory was 164.7 MB in the beginning and 162.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-15 13:41:05,881 INFO L168 Benchmark]: Boogie Preprocessor took 36.20 ms. Allocated memory is still 204.5 MB. Free memory was 162.7 MB in the beginning and 160.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-15 13:41:05,882 INFO L168 Benchmark]: RCFGBuilder took 567.85 ms. Allocated memory is still 204.5 MB. Free memory was 160.8 MB in the beginning and 140.8 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-09-15 13:41:05,882 INFO L168 Benchmark]: TraceAbstraction took 29619.09 ms. Allocated memory was 204.5 MB in the beginning and 427.8 MB in the end (delta: 223.3 MB). Free memory was 140.1 MB in the beginning and 374.7 MB in the end (delta: -234.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-15 13:41:05,885 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 847.67 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 101.7 MB in the beginning and 164.7 MB in the end (delta: -63.0 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 54.69 ms. Allocated memory is still 204.5 MB. Free memory was 164.7 MB in the beginning and 162.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.20 ms. Allocated memory is still 204.5 MB. Free memory was 162.7 MB in the beginning and 160.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 567.85 ms. Allocated memory is still 204.5 MB. Free memory was 160.8 MB in the beginning and 140.8 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29619.09 ms. Allocated memory was 204.5 MB in the beginning and 427.8 MB in the end (delta: 223.3 MB). Free memory was 140.1 MB in the beginning and 374.7 MB in the end (delta: -234.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - 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: 29.4s, OverallIterations: 33, TraceHistogramMax: 6, AutomataDifference: 11.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 504 SDtfs, 1406 SDslu, 2052 SDs, 0 SdLazy, 2172 SolverSat, 1086 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1498 GetRequests, 753 SyntacticMatches, 57 SemanticMatches, 688 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 10.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 33 MinimizatonAttempts, 490 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 952 NumberOfCodeBlocks, 952 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 889 ConstructedInterpolants, 0 QuantifiedInterpolants, 54597 SizeOfPredicates, 202 NumberOfNonLiveVariables, 3040 ConjunctsInSsa, 328 ConjunctsInUnsatCore, 63 InterpolantComputations, 5 PerfectInterpolantSequences, 90/700 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...