/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-b09bf87 [2020-10-16 12:30:33,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 12:30:33,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 12:30:33,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 12:30:33,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 12:30:33,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 12:30:33,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 12:30:33,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 12:30:33,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 12:30:33,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 12:30:33,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 12:30:33,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 12:30:33,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 12:30:33,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 12:30:33,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 12:30:33,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 12:30:33,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 12:30:33,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 12:30:33,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 12:30:33,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 12:30:33,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 12:30:33,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 12:30:33,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 12:30:33,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 12:30:33,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 12:30:33,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 12:30:33,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 12:30:33,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 12:30:33,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 12:30:33,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 12:30:33,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 12:30:33,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 12:30:33,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 12:30:33,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 12:30:33,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 12:30:33,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 12:30:33,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-10-16 12:30:33,241 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 12:30:33,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 12:30:33,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 12:30:33,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 12:30:33,243 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 12:30:33,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 12:30:33,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 12:30:33,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 12:30:33,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 12:30:33,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 12:30:33,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 12:30:33,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 12:30:33,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 12:30:33,245 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 12:30:33,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 12:30:33,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 12:30:33,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 12:30:33,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 12:30:33,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 12:30:33,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 12:30:33,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 12:30:33,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 12:30:33,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 12:30:33,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 12:30:33,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 12:30:33,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 12:30:33,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 12:30:33,248 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-16 12:30:33,248 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 12:30:33,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 12:30:33,248 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-16 12:30:33,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 12:30:33,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 12:30:33,603 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 12:30:33,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 12:30:33,605 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 12:30:33,605 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-10-16 12:30:33,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b392e80d/f1ca17e4ef7c4b229f6a4db06a701b44/FLAG1260ad0e3 [2020-10-16 12:30:34,246 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 12:30:34,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-1.i [2020-10-16 12:30:34,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b392e80d/f1ca17e4ef7c4b229f6a4db06a701b44/FLAG1260ad0e3 [2020-10-16 12:30:34,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b392e80d/f1ca17e4ef7c4b229f6a4db06a701b44 [2020-10-16 12:30:34,513 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 12:30:34,515 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 12:30:34,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 12:30:34,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 12:30:34,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 12:30:34,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:30:34" (1/1) ... [2020-10-16 12:30:34,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@136c8170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:34, skipping insertion in model container [2020-10-16 12:30:34,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:30:34" (1/1) ... [2020-10-16 12:30:34,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 12:30:34,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 12:30:35,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:30:35,094 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 12:30:35,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:30:35,237 INFO L208 MainTranslator]: Completed translation [2020-10-16 12:30:35,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:35 WrapperNode [2020-10-16 12:30:35,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 12:30:35,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 12:30:35,239 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 12:30:35,239 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 12:30:35,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:35" (1/1) ... [2020-10-16 12:30:35,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:35" (1/1) ... [2020-10-16 12:30:35,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 12:30:35,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 12:30:35,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 12:30:35,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 12:30:35,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:35" (1/1) ... [2020-10-16 12:30:35,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:35" (1/1) ... [2020-10-16 12:30:35,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:35" (1/1) ... [2020-10-16 12:30:35,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:35" (1/1) ... [2020-10-16 12:30:35,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:35" (1/1) ... [2020-10-16 12:30:35,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:35" (1/1) ... [2020-10-16 12:30:35,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:35" (1/1) ... [2020-10-16 12:30:35,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 12:30:35,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 12:30:35,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 12:30:35,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 12:30:35,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:35" (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 [2020-10-16 12:30:35,405 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 12:30:35,405 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 12:30:35,405 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 12:30:35,406 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 12:30:35,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 12:30:35,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 12:30:35,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 12:30:35,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 12:30:35,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 12:30:35,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 12:30:35,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 12:30:35,409 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 12:30:35,789 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 12:30:35,790 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 12:30:35,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:30:35 BoogieIcfgContainer [2020-10-16 12:30:35,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 12:30:35,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 12:30:35,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 12:30:35,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 12:30:35,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 12:30:34" (1/3) ... [2020-10-16 12:30:35,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f2b265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:30:35, skipping insertion in model container [2020-10-16 12:30:35,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:30:35" (2/3) ... [2020-10-16 12:30:35,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f2b265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:30:35, skipping insertion in model container [2020-10-16 12:30:35,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:30:35" (3/3) ... [2020-10-16 12:30:35,804 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-10-16 12:30:35,819 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 12:30:35,820 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 12:30:35,828 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 12:30:35,829 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 12:30:35,856 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,857 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,857 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,858 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,858 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,858 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,859 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,859 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,859 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,860 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,860 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,860 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,861 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,861 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,862 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,862 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,862 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,862 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,863 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,863 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,863 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,864 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,864 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,865 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,865 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,865 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,865 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,866 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,870 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,870 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,871 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,871 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,871 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,871 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,882 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,883 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,883 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,883 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,883 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,884 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:30:35,887 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 12:30:35,901 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 12:30:35,921 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:30:35,921 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:30:35,921 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:30:35,921 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 12:30:35,922 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:30:35,922 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:30:35,922 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:30:35,922 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:30:35,935 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:30:35,935 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 12:30:35,938 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 12:30:35,941 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 12:30:35,985 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 12:30:35,985 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 12:30:35,991 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 12:30:35,994 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 12:30:36,954 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-16 12:30:37,174 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-16 12:30:37,174 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 12:30:37,182 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-16 12:30:37,195 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 12:30:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 12:30:37,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 12:30:37,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:37,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 12:30:37,206 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:37,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:37,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 12:30:37,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:37,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207219480] [2020-10-16 12:30:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:37,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207219480] [2020-10-16 12:30:37,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:30:37,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 12:30:37,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1554293997] [2020-10-16 12:30:37,446 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:37,450 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:37,465 INFO L258 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-10-16 12:30:37,465 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:37,470 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:30:37,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:30:37,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:37,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:30:37,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:30:37,490 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 12:30:37,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:37,575 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-16 12:30:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 12:30:37,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 12:30:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:37,589 INFO L225 Difference]: With dead ends: 75 [2020-10-16 12:30:37,589 INFO L226 Difference]: Without dead ends: 42 [2020-10-16 12:30:37,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:30:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-16 12:30:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-16 12:30:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-16 12:30:37,637 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-16 12:30:37,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:37,637 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-16 12:30:37,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:30:37,637 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-16 12:30:37,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 12:30:37,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:37,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:37,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 12:30:37,639 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:37,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:37,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-16 12:30:37,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:37,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525467249] [2020-10-16 12:30:37,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:37,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525467249] [2020-10-16 12:30:37,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:30:37,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:30:37,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1502541015] [2020-10-16 12:30:37,734 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:37,736 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:37,740 INFO L258 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-10-16 12:30:37,741 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:37,782 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:30:37,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:30:37,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:37,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:30:37,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:30:37,785 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-16 12:30:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:37,817 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-16 12:30:37,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:30:37,818 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 12:30:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:37,819 INFO L225 Difference]: With dead ends: 56 [2020-10-16 12:30:37,819 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 12:30:37,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:30:37,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 12:30:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 12:30:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-16 12:30:37,829 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-16 12:30:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:37,830 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-16 12:30:37,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:30:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-16 12:30:37,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 12:30:37,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:37,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:37,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 12:30:37,832 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:37,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:37,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-16 12:30:37,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:37,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493162536] [2020-10-16 12:30:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:37,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493162536] [2020-10-16 12:30:37,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:30:37,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 12:30:37,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1836562114] [2020-10-16 12:30:37,928 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:37,929 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:37,933 INFO L258 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-10-16 12:30:37,933 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:37,959 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:37,960 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:37,990 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-10-16 12:30:37,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 12:30:37,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 12:30:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-16 12:30:37,991 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-10-16 12:30:38,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:38,118 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-10-16 12:30:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 12:30:38,119 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-16 12:30:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:38,120 INFO L225 Difference]: With dead ends: 62 [2020-10-16 12:30:38,120 INFO L226 Difference]: Without dead ends: 44 [2020-10-16 12:30:38,121 INFO L677 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 [2020-10-16 12:30:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-16 12:30:38,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-10-16 12:30:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 12:30:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-16 12:30:38,128 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-10-16 12:30:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:38,128 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-16 12:30:38,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 12:30:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-16 12:30:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 12:30:38,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:38,130 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:38,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 12:30:38,130 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:38,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:38,131 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-10-16 12:30:38,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:38,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107169999] [2020-10-16 12:30:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:38,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107169999] [2020-10-16 12:30:38,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115949026] [2020-10-16 12:30:38,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:38,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:38,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:38,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 12:30:38,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:38,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:38,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 12:30:38,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [76275153] [2020-10-16 12:30:38,309 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:38,310 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:38,313 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-10-16 12:30:38,313 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:38,321 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:38,321 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:38,339 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:38,339 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:38,359 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:38,360 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:38,375 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:38,376 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:38,385 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-10-16 12:30:38,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:30:38,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:30:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:30:38,387 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-10-16 12:30:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:38,514 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-16 12:30:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 12:30:38,515 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 12:30:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:38,516 INFO L225 Difference]: With dead ends: 56 [2020-10-16 12:30:38,516 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 12:30:38,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 12:30:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 12:30:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-10-16 12:30:38,525 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-10-16 12:30:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:38,525 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-10-16 12:30:38,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:30:38,525 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-10-16 12:30:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 12:30:38,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:38,526 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:38,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:38,741 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-10-16 12:30:38,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:38,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138255670] [2020-10-16 12:30:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:38,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138255670] [2020-10-16 12:30:38,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608058814] [2020-10-16 12:30:38,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:38,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 12:30:38,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:38,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 12:30:38,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:38,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:38,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 12:30:38,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1261663025] [2020-10-16 12:30:38,907 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:38,908 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:38,910 INFO L258 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-10-16 12:30:38,910 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:38,926 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:38,926 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:38,942 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-10-16 12:30:38,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:30:38,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:38,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:30:38,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:30:38,943 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-10-16 12:30:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:39,140 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-10-16 12:30:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 12:30:39,141 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 12:30:39,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:39,142 INFO L225 Difference]: With dead ends: 66 [2020-10-16 12:30:39,142 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 12:30:39,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:30:39,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 12:30:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-10-16 12:30:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 12:30:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-10-16 12:30:39,154 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-10-16 12:30:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:39,155 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-10-16 12:30:39,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:30:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-10-16 12:30:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 12:30:39,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:39,156 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:39,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:39,357 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:39,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-10-16 12:30:39,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:39,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102716321] [2020-10-16 12:30:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:39,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102716321] [2020-10-16 12:30:39,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456146110] [2020-10-16 12:30:39,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:39,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:30:39,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:39,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 12:30:39,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:39,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:39,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 12:30:39,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1122086710] [2020-10-16 12:30:39,520 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:39,522 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:39,526 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-10-16 12:30:39,527 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:39,555 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:39,556 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:39,587 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-10-16 12:30:39,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 12:30:39,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:39,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 12:30:39,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-16 12:30:39,589 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-10-16 12:30:39,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:39,770 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-10-16 12:30:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 12:30:39,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 12:30:39,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:39,772 INFO L225 Difference]: With dead ends: 64 [2020-10-16 12:30:39,772 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 12:30:39,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:30:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 12:30:39,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-16 12:30:39,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 12:30:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-10-16 12:30:39,779 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-10-16 12:30:39,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:39,779 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-10-16 12:30:39,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 12:30:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-10-16 12:30:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 12:30:39,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:39,780 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:39,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:39,993 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:39,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:39,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-10-16 12:30:39,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:39,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185388643] [2020-10-16 12:30:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:40,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185388643] [2020-10-16 12:30:40,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000278861] [2020-10-16 12:30:40,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:40,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:40,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:40,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 12:30:40,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:40,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:40,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 12:30:40,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [130055614] [2020-10-16 12:30:40,169 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:40,170 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:40,173 INFO L258 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-10-16 12:30:40,173 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:40,190 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:40,191 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:40,214 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-10-16 12:30:40,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 12:30:40,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:40,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 12:30:40,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-16 12:30:40,215 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-10-16 12:30:40,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:40,440 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-10-16 12:30:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 12:30:40,441 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 12:30:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:40,442 INFO L225 Difference]: With dead ends: 63 [2020-10-16 12:30:40,442 INFO L226 Difference]: Without dead ends: 51 [2020-10-16 12:30:40,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:30:40,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-16 12:30:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-10-16 12:30:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 12:30:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-16 12:30:40,453 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-10-16 12:30:40,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:40,454 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-16 12:30:40,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 12:30:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-16 12:30:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 12:30:40,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:40,455 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:40,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:40,669 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:40,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:40,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-10-16 12:30:40,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:40,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595146257] [2020-10-16 12:30:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:40,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595146257] [2020-10-16 12:30:40,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343329681] [2020-10-16 12:30:40,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:40,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 12:30:40,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:40,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:30:40,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:40,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:40,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 12:30:40,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1724152328] [2020-10-16 12:30:40,861 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:40,862 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:40,866 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-10-16 12:30:40,866 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:40,887 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:40,887 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:40,905 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:40,906 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:40,920 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:40,921 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:40,927 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:40,928 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:40,935 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-10-16 12:30:40,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 12:30:40,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:40,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 12:30:40,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:30:40,937 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-10-16 12:30:41,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:41,079 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-10-16 12:30:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 12:30:41,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 12:30:41,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:41,081 INFO L225 Difference]: With dead ends: 60 [2020-10-16 12:30:41,082 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 12:30:41,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:30:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 12:30:41,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-16 12:30:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 12:30:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 12:30:41,087 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-10-16 12:30:41,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:41,088 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 12:30:41,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 12:30:41,088 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 12:30:41,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 12:30:41,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:41,089 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:41,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:41,301 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:41,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-10-16 12:30:41,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:41,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43735321] [2020-10-16 12:30:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:41,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43735321] [2020-10-16 12:30:41,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408680107] [2020-10-16 12:30:41,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:41,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:30:41,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:41,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:41,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 12:30:41,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1115248808] [2020-10-16 12:30:41,461 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:41,463 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:41,466 INFO L258 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-16 12:30:41,468 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:41,498 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:41,498 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:41,516 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-10-16 12:30:41,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 12:30:41,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:41,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 12:30:41,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:30:41,518 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-10-16 12:30:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:41,780 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-16 12:30:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 12:30:41,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 12:30:41,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:41,782 INFO L225 Difference]: With dead ends: 74 [2020-10-16 12:30:41,782 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 12:30:41,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:30:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 12:30:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-16 12:30:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 12:30:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-10-16 12:30:41,788 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-10-16 12:30:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:41,789 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-10-16 12:30:41,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 12:30:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-10-16 12:30:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 12:30:41,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:41,790 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:42,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:42,005 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:42,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-10-16 12:30:42,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:42,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48189128] [2020-10-16 12:30:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:42,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48189128] [2020-10-16 12:30:42,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429654939] [2020-10-16 12:30:42,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:42,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:42,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:42,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:30:42,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:42,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:42,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 12:30:42,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [220465406] [2020-10-16 12:30:42,161 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:42,162 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:42,165 INFO L258 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-16 12:30:42,165 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:42,187 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:42,187 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:42,203 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-10-16 12:30:42,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 12:30:42,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:42,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 12:30:42,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:30:42,205 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-10-16 12:30:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:42,466 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-10-16 12:30:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 12:30:42,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 12:30:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:42,468 INFO L225 Difference]: With dead ends: 74 [2020-10-16 12:30:42,468 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 12:30:42,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:30:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 12:30:42,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-10-16 12:30:42,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-16 12:30:42,476 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-10-16 12:30:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:42,477 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-16 12:30:42,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 12:30:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-16 12:30:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 12:30:42,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:42,479 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:42,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 12:30:42,691 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:42,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:42,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-10-16 12:30:42,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:42,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420048925] [2020-10-16 12:30:42,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:42,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420048925] [2020-10-16 12:30:42,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006447402] [2020-10-16 12:30:42,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:42,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 12:30:42,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:30:42,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:42,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:42,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 12:30:42,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [371973014] [2020-10-16 12:30:42,907 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:42,908 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:42,912 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-10-16 12:30:42,912 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:42,945 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:42,946 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:42,963 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-10-16 12:30:42,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 12:30:42,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:42,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 12:30:42,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 12:30:42,964 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-10-16 12:30:43,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:43,182 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-10-16 12:30:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 12:30:43,182 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 12:30:43,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:43,183 INFO L225 Difference]: With dead ends: 70 [2020-10-16 12:30:43,183 INFO L226 Difference]: Without dead ends: 64 [2020-10-16 12:30:43,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:30:43,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-16 12:30:43,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-10-16 12:30:43,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 12:30:43,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-10-16 12:30:43,190 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-10-16 12:30:43,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:43,193 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-10-16 12:30:43,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 12:30:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-10-16 12:30:43,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 12:30:43,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:43,194 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:43,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 12:30:43,400 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:43,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-10-16 12:30:43,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:43,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107474182] [2020-10-16 12:30:43,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:43,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107474182] [2020-10-16 12:30:43,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965429778] [2020-10-16 12:30:43,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:43,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:30:43,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:43,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:30:43,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:43,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:43,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 12:30:43,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2134108873] [2020-10-16 12:30:43,579 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:43,580 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:43,583 INFO L258 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-10-16 12:30:43,583 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:43,596 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:43,597 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:43,612 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-10-16 12:30:43,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 12:30:43,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:43,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 12:30:43,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-16 12:30:43,614 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-10-16 12:30:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:43,888 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-16 12:30:43,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 12:30:43,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 12:30:43,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:43,890 INFO L225 Difference]: With dead ends: 69 [2020-10-16 12:30:43,890 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 12:30:43,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:30:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 12:30:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-10-16 12:30:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 12:30:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-10-16 12:30:43,896 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-10-16 12:30:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:43,896 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-10-16 12:30:43,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 12:30:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-10-16 12:30:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 12:30:43,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:43,903 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:44,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:44,107 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-10-16 12:30:44,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:44,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840715960] [2020-10-16 12:30:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:44,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840715960] [2020-10-16 12:30:44,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707085184] [2020-10-16 12:30:44,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:44,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 12:30:44,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:44,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:30:44,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:44,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:44,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 12:30:44,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1024808925] [2020-10-16 12:30:44,264 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:44,265 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:44,268 INFO L258 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-10-16 12:30:44,268 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:44,282 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:44,282 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:44,300 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-10-16 12:30:44,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 12:30:44,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:44,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 12:30:44,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 12:30:44,301 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-10-16 12:30:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:44,621 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-10-16 12:30:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 12:30:44,621 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 12:30:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:44,623 INFO L225 Difference]: With dead ends: 69 [2020-10-16 12:30:44,623 INFO L226 Difference]: Without dead ends: 57 [2020-10-16 12:30:44,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:30:44,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-16 12:30:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-10-16 12:30:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 12:30:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-16 12:30:44,627 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-10-16 12:30:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:44,627 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-16 12:30:44,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 12:30:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-16 12:30:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:30:44,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:44,628 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:44,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:44,834 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:44,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-10-16 12:30:44,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:44,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035275244] [2020-10-16 12:30:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:44,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035275244] [2020-10-16 12:30:44,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139020558] [2020-10-16 12:30:44,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:45,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 12:30:45,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:45,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:30:45,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:45,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:45,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 12:30:45,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [76853012] [2020-10-16 12:30:45,027 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:45,029 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:45,032 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-10-16 12:30:45,032 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:45,042 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:45,042 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:45,059 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:45,060 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:45,073 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:45,073 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:45,078 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:45,078 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:45,085 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-10-16 12:30:45,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:30:45,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:45,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:30:45,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:45,087 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-10-16 12:30:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:45,295 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-10-16 12:30:45,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 12:30:45,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 12:30:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:45,297 INFO L225 Difference]: With dead ends: 66 [2020-10-16 12:30:45,297 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 12:30:45,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:30:45,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 12:30:45,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-16 12:30:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 12:30:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-16 12:30:45,301 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-10-16 12:30:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:45,301 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-16 12:30:45,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:30:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-16 12:30:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:30:45,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:45,302 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:45,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 12:30:45,514 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:45,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:45,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-10-16 12:30:45,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:45,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393674945] [2020-10-16 12:30:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:45,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393674945] [2020-10-16 12:30:45,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428894235] [2020-10-16 12:30:45,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:45,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:30:45,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:45,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:45,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 12:30:45,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1349504029] [2020-10-16 12:30:45,669 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:45,671 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:45,674 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-16 12:30:45,674 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:45,685 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:45,686 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:45,704 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-10-16 12:30:45,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:30:45,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:45,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:30:45,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:45,706 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-10-16 12:30:45,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:45,996 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-10-16 12:30:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 12:30:45,997 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 12:30:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:45,998 INFO L225 Difference]: With dead ends: 82 [2020-10-16 12:30:45,998 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 12:30:45,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:30:45,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 12:30:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-16 12:30:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 12:30:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-10-16 12:30:46,007 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-10-16 12:30:46,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:46,007 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-10-16 12:30:46,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:30:46,007 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-10-16 12:30:46,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:30:46,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:46,010 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:46,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 12:30:46,221 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:46,222 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-10-16 12:30:46,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:46,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753811170] [2020-10-16 12:30:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:46,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753811170] [2020-10-16 12:30:46,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546487873] [2020-10-16 12:30:46,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:46,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:46,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:46,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:30:46,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:46,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:46,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 12:30:46,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [557454883] [2020-10-16 12:30:46,421 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:46,422 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:46,424 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-16 12:30:46,424 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:46,436 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:46,436 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:46,461 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-10-16 12:30:46,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:30:46,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:46,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:30:46,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:46,463 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-10-16 12:30:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:46,772 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-16 12:30:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:30:46,772 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 12:30:46,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:46,773 INFO L225 Difference]: With dead ends: 81 [2020-10-16 12:30:46,773 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 12:30:46,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:30:46,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 12:30:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-10-16 12:30:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 12:30:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-10-16 12:30:46,780 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-10-16 12:30:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:46,780 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-10-16 12:30:46,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:30:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-10-16 12:30:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:30:46,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:46,781 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:46,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 12:30:46,991 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:46,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:46,991 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-10-16 12:30:46,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:46,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126313075] [2020-10-16 12:30:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:47,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126313075] [2020-10-16 12:30:47,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151460224] [2020-10-16 12:30:47,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:47,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 12:30:47,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:47,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:30:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:47,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:47,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 12:30:47,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [658962415] [2020-10-16 12:30:47,168 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:47,169 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:47,171 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-16 12:30:47,171 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:47,172 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:47,172 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:47,194 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-10-16 12:30:47,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:30:47,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:47,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:30:47,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:30:47,196 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-10-16 12:30:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:47,559 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-10-16 12:30:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 12:30:47,560 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 12:30:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:47,561 INFO L225 Difference]: With dead ends: 82 [2020-10-16 12:30:47,561 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 12:30:47,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:30:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 12:30:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-10-16 12:30:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 12:30:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-16 12:30:47,565 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-10-16 12:30:47,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:47,565 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-16 12:30:47,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:30:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-16 12:30:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 12:30:47,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:47,566 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:47,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:47,771 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:47,772 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-10-16 12:30:47,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:47,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488069249] [2020-10-16 12:30:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:47,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488069249] [2020-10-16 12:30:47,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723868653] [2020-10-16 12:30:47,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:47,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:30:47,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:47,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:30:47,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:47,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:47,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 12:30:47,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1461069674] [2020-10-16 12:30:47,956 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:47,957 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:47,963 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-10-16 12:30:47,963 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:47,967 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:47,968 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:47,994 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-10-16 12:30:47,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:30:47,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:47,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:30:47,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:47,995 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-10-16 12:30:48,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:48,241 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-16 12:30:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 12:30:48,242 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 12:30:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:48,243 INFO L225 Difference]: With dead ends: 78 [2020-10-16 12:30:48,243 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 12:30:48,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:30:48,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 12:30:48,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-16 12:30:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 12:30:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-10-16 12:30:48,247 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-10-16 12:30:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:48,247 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-10-16 12:30:48,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:30:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-10-16 12:30:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 12:30:48,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:48,248 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:48,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 12:30:48,457 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:48,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:48,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-10-16 12:30:48,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:48,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500155189] [2020-10-16 12:30:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:48,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500155189] [2020-10-16 12:30:48,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941840702] [2020-10-16 12:30:48,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:48,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 12:30:48,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:48,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:30:48,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:48,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:48,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 12:30:48,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1723280744] [2020-10-16 12:30:48,626 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:48,628 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:48,631 INFO L258 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-16 12:30:48,631 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:48,634 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:48,634 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:48,660 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-10-16 12:30:48,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:30:48,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:48,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:30:48,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:48,661 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-10-16 12:30:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:48,964 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-10-16 12:30:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 12:30:48,965 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 12:30:48,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:48,966 INFO L225 Difference]: With dead ends: 75 [2020-10-16 12:30:48,966 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 12:30:48,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-16 12:30:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 12:30:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-16 12:30:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 12:30:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-16 12:30:48,970 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-10-16 12:30:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:48,970 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-16 12:30:48,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:30:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-16 12:30:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 12:30:48,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:48,971 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:49,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:49,180 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:49,180 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-10-16 12:30:49,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:49,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320503444] [2020-10-16 12:30:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:49,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320503444] [2020-10-16 12:30:49,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700512132] [2020-10-16 12:30:49,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:49,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 12:30:49,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:49,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:30:49,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:49,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:49,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 12:30:49,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [924850760] [2020-10-16 12:30:49,327 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:49,329 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:49,332 INFO L258 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-16 12:30:49,332 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:49,336 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:49,337 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:49,359 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-10-16 12:30:49,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:30:49,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:49,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:30:49,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:49,361 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-10-16 12:30:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:49,736 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-10-16 12:30:49,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:30:49,743 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 12:30:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:49,743 INFO L225 Difference]: With dead ends: 75 [2020-10-16 12:30:49,744 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 12:30:49,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:30:49,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 12:30:49,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-10-16 12:30:49,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 12:30:49,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-10-16 12:30:49,747 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-10-16 12:30:49,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:49,748 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-10-16 12:30:49,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:30:49,748 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-10-16 12:30:49,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 12:30:49,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:49,749 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:49,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:49,958 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:49,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:49,958 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-10-16 12:30:49,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:49,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881393314] [2020-10-16 12:30:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:50,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881393314] [2020-10-16 12:30:50,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939950028] [2020-10-16 12:30:50,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:50,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:30:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:50,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:50,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 12:30:50,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1891753579] [2020-10-16 12:30:50,132 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:50,134 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:50,137 INFO L258 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-16 12:30:50,137 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:50,140 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:50,140 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:50,163 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (<= ~j~0 14) (<= ~i~0 16))] [2020-10-16 12:30:50,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 12:30:50,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:50,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 12:30:50,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-16 12:30:50,164 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-10-16 12:30:50,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:50,545 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-10-16 12:30:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 12:30:50,546 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 12:30:50,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:50,547 INFO L225 Difference]: With dead ends: 75 [2020-10-16 12:30:50,547 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 12:30:50,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:30:50,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 12:30:50,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-16 12:30:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 12:30:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 12:30:50,553 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-10-16 12:30:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:50,553 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 12:30:50,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 12:30:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 12:30:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:50,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:50,554 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:50,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 12:30:50,758 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:50,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:50,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-10-16 12:30:50,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:50,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297808567] [2020-10-16 12:30:50,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:50,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297808567] [2020-10-16 12:30:50,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847566336] [2020-10-16 12:30:50,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:50,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:50,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:50,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:50,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:50,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:50,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:50,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1959859975] [2020-10-16 12:30:50,934 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:50,935 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:50,939 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-10-16 12:30:50,940 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:50,945 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:50,946 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:50,967 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:50,967 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:50,980 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:50,980 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:50,992 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:50,992 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:51,000 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-10-16 12:30:51,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:51,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:51,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:51,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:51,002 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-10-16 12:30:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:51,262 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-10-16 12:30:51,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 12:30:51,263 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:51,263 INFO L225 Difference]: With dead ends: 72 [2020-10-16 12:30:51,264 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 12:30:51,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:30:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 12:30:51,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-16 12:30:51,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 12:30:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-16 12:30:51,267 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-10-16 12:30:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:51,267 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-16 12:30:51,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-16 12:30:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:51,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:51,268 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:51,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:51,477 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:51,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:51,478 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-10-16 12:30:51,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:51,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874813986] [2020-10-16 12:30:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:51,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874813986] [2020-10-16 12:30:51,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45182103] [2020-10-16 12:30:51,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:51,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 12:30:51,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:51,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:51,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:51,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:51,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1517595893] [2020-10-16 12:30:51,663 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:51,665 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:51,667 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-16 12:30:51,668 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:51,669 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:51,669 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:51,705 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-10-16 12:30:51,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:51,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:51,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:51,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:51,706 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-10-16 12:30:52,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:52,046 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-10-16 12:30:52,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:30:52,047 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:52,047 INFO L225 Difference]: With dead ends: 92 [2020-10-16 12:30:52,048 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 12:30:52,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2020-10-16 12:30:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 12:30:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-10-16 12:30:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 12:30:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-10-16 12:30:52,051 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-10-16 12:30:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:52,052 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-10-16 12:30:52,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-10-16 12:30:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:52,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:52,054 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:52,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 12:30:52,263 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:52,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-10-16 12:30:52,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:52,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688466222] [2020-10-16 12:30:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:52,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688466222] [2020-10-16 12:30:52,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809323653] [2020-10-16 12:30:52,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:52,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:30:52,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:52,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:52,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:52,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:52,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:52,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1737982667] [2020-10-16 12:30:52,425 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:52,427 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:52,430 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-16 12:30:52,430 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:52,443 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:52,443 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:52,458 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-10-16 12:30:52,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:52,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:52,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:52,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:52,459 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-10-16 12:30:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:52,859 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-10-16 12:30:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:30:52,860 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:52,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:52,861 INFO L225 Difference]: With dead ends: 89 [2020-10-16 12:30:52,861 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 12:30:52,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-16 12:30:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 12:30:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-10-16 12:30:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 12:30:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-10-16 12:30:52,865 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-10-16 12:30:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:52,865 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-10-16 12:30:52,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-10-16 12:30:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:52,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:52,866 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:53,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 12:30:53,067 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:53,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-10-16 12:30:53,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:53,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495641350] [2020-10-16 12:30:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:53,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495641350] [2020-10-16 12:30:53,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996098971] [2020-10-16 12:30:53,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:53,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 12:30:53,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:53,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:53,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:53,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:53,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:53,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [852798870] [2020-10-16 12:30:53,232 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:53,234 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:53,237 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-16 12:30:53,237 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:53,238 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:53,239 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:53,268 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-10-16 12:30:53,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:53,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:53,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:53,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:53,269 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-10-16 12:30:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:53,708 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-10-16 12:30:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:30:53,709 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:53,710 INFO L225 Difference]: With dead ends: 89 [2020-10-16 12:30:53,710 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 12:30:53,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 12:30:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 12:30:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-16 12:30:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 12:30:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-10-16 12:30:53,714 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-10-16 12:30:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:53,715 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-10-16 12:30:53,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-10-16 12:30:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:30:53,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:53,716 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:53,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:53,925 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:53,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-10-16 12:30:53,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:53,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84569500] [2020-10-16 12:30:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:54,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84569500] [2020-10-16 12:30:54,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283060439] [2020-10-16 12:30:54,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:54,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 12:30:54,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:54,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:30:54,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:54,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:54,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 12:30:54,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [230268840] [2020-10-16 12:30:54,090 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:54,091 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:54,094 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-16 12:30:54,094 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:54,095 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:54,095 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:54,127 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-10-16 12:30:54,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:30:54,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:30:54,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:30:54,129 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-10-16 12:30:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:54,585 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-10-16 12:30:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 12:30:54,586 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 12:30:54,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:54,586 INFO L225 Difference]: With dead ends: 90 [2020-10-16 12:30:54,586 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 12:30:54,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 12:30:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 12:30:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-10-16 12:30:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 12:30:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-16 12:30:54,589 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-10-16 12:30:54,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:54,590 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-16 12:30:54,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:30:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-16 12:30:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:30:54,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:54,592 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:54,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 12:30:54,800 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:54,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-10-16 12:30:54,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:54,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242067325] [2020-10-16 12:30:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:54,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242067325] [2020-10-16 12:30:54,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055619413] [2020-10-16 12:30:54,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:54,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:30:54,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:54,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:54,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:30:54,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2057266879] [2020-10-16 12:30:54,984 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:54,985 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:54,988 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-10-16 12:30:54,988 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:54,998 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:54,999 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:55,024 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6427#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-10-16 12:30:55,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:30:55,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:55,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:30:55,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:30:55,025 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 15 states. [2020-10-16 12:30:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:55,344 INFO L93 Difference]: Finished difference Result 86 states and 198 transitions. [2020-10-16 12:30:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 12:30:55,344 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:30:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:55,345 INFO L225 Difference]: With dead ends: 86 [2020-10-16 12:30:55,346 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 12:30:55,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2020-10-16 12:30:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 12:30:55,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-16 12:30:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 12:30:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 140 transitions. [2020-10-16 12:30:55,349 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 140 transitions. Word has length 18 [2020-10-16 12:30:55,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:55,350 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 140 transitions. [2020-10-16 12:30:55,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:30:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 140 transitions. [2020-10-16 12:30:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:30:55,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:55,352 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:55,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:55,553 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 26 times [2020-10-16 12:30:55,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:55,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712585081] [2020-10-16 12:30:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:55,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712585081] [2020-10-16 12:30:55,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402037679] [2020-10-16 12:30:55,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:55,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:30:55,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:55,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:30:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:55,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:55,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:30:55,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [55713803] [2020-10-16 12:30:55,822 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:55,825 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:55,830 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-16 12:30:55,830 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:55,846 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:55,846 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:55,874 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6719#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-10-16 12:30:55,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:30:55,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:55,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:30:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:30:55,875 INFO L87 Difference]: Start difference. First operand 57 states and 140 transitions. Second operand 15 states. [2020-10-16 12:30:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:56,347 INFO L93 Difference]: Finished difference Result 83 states and 194 transitions. [2020-10-16 12:30:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:30:56,348 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:30:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:56,349 INFO L225 Difference]: With dead ends: 83 [2020-10-16 12:30:56,349 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 12:30:56,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:30:56,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 12:30:56,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-10-16 12:30:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 12:30:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 146 transitions. [2020-10-16 12:30:56,356 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 146 transitions. Word has length 18 [2020-10-16 12:30:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:56,357 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 146 transitions. [2020-10-16 12:30:56,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:30:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 146 transitions. [2020-10-16 12:30:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:30:56,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:56,358 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:56,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 12:30:56,572 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:56,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 27 times [2020-10-16 12:30:56,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:56,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211403380] [2020-10-16 12:30:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:56,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211403380] [2020-10-16 12:30:56,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008225727] [2020-10-16 12:30:56,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:56,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 12:30:56,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:56,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:30:56,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:56,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:56,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:30:56,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1873382325] [2020-10-16 12:30:56,800 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:56,802 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:56,806 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-16 12:30:56,806 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:56,819 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:56,819 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:56,838 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7016#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-10-16 12:30:56,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:30:56,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:56,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:30:56,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:30:56,839 INFO L87 Difference]: Start difference. First operand 59 states and 146 transitions. Second operand 15 states. [2020-10-16 12:30:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:57,233 INFO L93 Difference]: Finished difference Result 81 states and 192 transitions. [2020-10-16 12:30:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:30:57,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:30:57,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:57,235 INFO L225 Difference]: With dead ends: 81 [2020-10-16 12:30:57,235 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 12:30:57,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2020-10-16 12:30:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 12:30:57,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-16 12:30:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 12:30:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 152 transitions. [2020-10-16 12:30:57,240 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 152 transitions. Word has length 18 [2020-10-16 12:30:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:57,240 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 152 transitions. [2020-10-16 12:30:57,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:30:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 152 transitions. [2020-10-16 12:30:57,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:30:57,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:57,241 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:57,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 12:30:57,448 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:57,449 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 28 times [2020-10-16 12:30:57,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:57,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737294827] [2020-10-16 12:30:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:57,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737294827] [2020-10-16 12:30:57,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465305473] [2020-10-16 12:30:57,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:57,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:30:57,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:57,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:30:57,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:57,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:57,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:30:57,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [320048809] [2020-10-16 12:30:57,612 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:57,614 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:57,617 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-16 12:30:57,617 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:57,628 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:57,628 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:57,647 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7319#(and (<= ~j~0 14) (<= ~i~0 16))] [2020-10-16 12:30:57,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:30:57,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:57,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:30:57,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:30:57,649 INFO L87 Difference]: Start difference. First operand 61 states and 152 transitions. Second operand 15 states. [2020-10-16 12:30:58,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:58,113 INFO L93 Difference]: Finished difference Result 81 states and 195 transitions. [2020-10-16 12:30:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:30:58,116 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:30:58,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:58,117 INFO L225 Difference]: With dead ends: 81 [2020-10-16 12:30:58,117 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 12:30:58,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 12:30:58,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 12:30:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-10-16 12:30:58,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 12:30:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-10-16 12:30:58,122 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 18 [2020-10-16 12:30:58,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:58,122 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-10-16 12:30:58,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:30:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-10-16 12:30:58,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:30:58,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:58,123 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:58,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:58,332 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:58,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:58,333 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 29 times [2020-10-16 12:30:58,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:58,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993669937] [2020-10-16 12:30:58,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:58,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993669937] [2020-10-16 12:30:58,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608855087] [2020-10-16 12:30:58,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:58,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 12:30:58,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:58,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:30:58,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:58,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:30:58,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 12:30:58,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1354635326] [2020-10-16 12:30:58,614 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:58,617 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:58,622 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-16 12:30:58,622 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:58,637 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-16 12:30:58,638 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-16 12:30:58,662 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7630#(and (<= ~j~0 16) (<= ~i~0 16))] [2020-10-16 12:30:58,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:30:58,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:58,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:30:58,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:30:58,663 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 15 states. [2020-10-16 12:30:59,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:59,294 INFO L93 Difference]: Finished difference Result 79 states and 195 transitions. [2020-10-16 12:30:59,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 12:30:59,294 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 12:30:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:59,295 INFO L225 Difference]: With dead ends: 79 [2020-10-16 12:30:59,295 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 12:30:59,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 12:30:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 12:30:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-16 12:30:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 12:30:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 12:30:59,299 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-16 12:30:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:59,299 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 12:30:59,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:30:59,300 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 12:30:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:30:59,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:59,300 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:59,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:59,510 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:59,511 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 30 times [2020-10-16 12:30:59,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:59,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935945222] [2020-10-16 12:30:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:30:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:59,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935945222] [2020-10-16 12:30:59,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390904733] [2020-10-16 12:30:59,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:30:59,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 12:30:59,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:30:59,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 12:30:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:30:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:30:59,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 12:30:59,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-10-16 12:30:59,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1325017357] [2020-10-16 12:30:59,660 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:30:59,664 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:30:59,668 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2020-10-16 12:30:59,668 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:30:59,701 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:30:59,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:30:59,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:30:59,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:30:59,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-16 12:30:59,702 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 8 states. [2020-10-16 12:30:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:30:59,715 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-10-16 12:30:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 12:30:59,715 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-16 12:30:59,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:30:59,716 INFO L225 Difference]: With dead ends: 151 [2020-10-16 12:30:59,716 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 12:30:59,716 INFO L677 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 [2020-10-16 12:30:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 12:30:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-16 12:30:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 12:30:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-10-16 12:30:59,719 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-10-16 12:30:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:30:59,719 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-10-16 12:30:59,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:30:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-10-16 12:30:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:30:59,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:30:59,720 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:30:59,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 12:30:59,927 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:30:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:30:59,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 31 times [2020-10-16 12:30:59,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:30:59,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333673327] [2020-10-16 12:30:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:30:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:00,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333673327] [2020-10-16 12:31:00,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265850203] [2020-10-16 12:31:00,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:31:00,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 12:31:00,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:31:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:31:00,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 12:31:00,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 21 [2020-10-16 12:31:00,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1325924624] [2020-10-16 12:31:00,219 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:31:00,221 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:31:00,225 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2020-10-16 12:31:00,225 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:31:00,269 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:31:00,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:31:00,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:31:00,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:31:00,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:00,270 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand 8 states. [2020-10-16 12:31:00,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:31:00,284 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-10-16 12:31:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 12:31:00,285 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-16 12:31:00,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:31:00,285 INFO L225 Difference]: With dead ends: 86 [2020-10-16 12:31:00,286 INFO L226 Difference]: Without dead ends: 0 [2020-10-16 12:31:00,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:31:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-16 12:31:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-16 12:31:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-16 12:31:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-16 12:31:00,287 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-16 12:31:00,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:31:00,288 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-16 12:31:00,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:31:00,288 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-16 12:31:00,289 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-16 12:31:00,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:31:00,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 12:31:00 BasicIcfg [2020-10-16 12:31:00,500 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 12:31:00,501 INFO L168 Benchmark]: Toolchain (without parser) took 25987.02 ms. Allocated memory was 139.5 MB in the beginning and 378.5 MB in the end (delta: 239.1 MB). Free memory was 100.9 MB in the beginning and 132.5 MB in the end (delta: -31.5 MB). Peak memory consumption was 207.5 MB. Max. memory is 7.1 GB. [2020-10-16 12:31:00,501 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-16 12:31:00,502 INFO L168 Benchmark]: CACSL2BoogieTranslator took 721.92 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 100.7 MB in the beginning and 164.8 MB in the end (delta: -64.1 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-10-16 12:31:00,502 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.65 ms. Allocated memory is still 204.5 MB. Free memory was 164.8 MB in the beginning and 162.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 12:31:00,502 INFO L168 Benchmark]: Boogie Preprocessor took 31.42 ms. Allocated memory is still 204.5 MB. Free memory was 162.8 MB in the beginning and 160.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 12:31:00,503 INFO L168 Benchmark]: RCFGBuilder took 470.51 ms. Allocated memory is still 204.5 MB. Free memory was 160.8 MB in the beginning and 140.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-10-16 12:31:00,503 INFO L168 Benchmark]: TraceAbstraction took 24705.43 ms. Allocated memory was 204.5 MB in the beginning and 378.5 MB in the end (delta: 174.1 MB). Free memory was 140.0 MB in the beginning and 132.5 MB in the end (delta: 7.6 MB). Peak memory consumption was 181.6 MB. Max. memory is 7.1 GB. [2020-10-16 12:31:00,505 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 721.92 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 100.7 MB in the beginning and 164.8 MB in the end (delta: -64.1 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 51.65 ms. Allocated memory is still 204.5 MB. Free memory was 164.8 MB in the beginning and 162.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.42 ms. Allocated memory is still 204.5 MB. Free memory was 162.8 MB in the beginning and 160.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 470.51 ms. Allocated memory is still 204.5 MB. Free memory was 160.8 MB in the beginning and 140.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24705.43 ms. Allocated memory was 204.5 MB in the beginning and 378.5 MB in the end (delta: 174.1 MB). Free memory was 140.0 MB in the beginning and 132.5 MB in the end (delta: 7.6 MB). Peak memory consumption was 181.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 488 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.5s, OverallIterations: 33, TraceHistogramMax: 6, AutomataDifference: 9.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 504 SDtfs, 1403 SDslu, 2063 SDs, 0 SdLazy, 2177 SolverSat, 1086 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1315 GetRequests, 571 SyntacticMatches, 44 SemanticMatches, 700 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3831 ImplicationChecksByTransitivity, 8.9s 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: 0.1s AutomataMinimizationTime, 33 MinimizatonAttempts, 490 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 952 NumberOfCodeBlocks, 952 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 889 ConstructedInterpolants, 0 QuantifiedInterpolants, 55677 SizeOfPredicates, 202 NumberOfNonLiveVariables, 3040 ConjunctsInSsa, 328 ConjunctsInUnsatCore, 63 InterpolantComputations, 5 PerfectInterpolantSequences, 70/700 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...