/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c7e336b [2020-10-06 00:01:03,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-06 00:01:03,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-06 00:01:03,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-06 00:01:03,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-06 00:01:03,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-06 00:01:03,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-06 00:01:03,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-06 00:01:03,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-06 00:01:03,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-06 00:01:03,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-06 00:01:03,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-06 00:01:03,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-06 00:01:03,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-06 00:01:03,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-06 00:01:03,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-06 00:01:03,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-06 00:01:03,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-06 00:01:03,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-06 00:01:03,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-06 00:01:03,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-06 00:01:03,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-06 00:01:03,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-06 00:01:03,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-06 00:01:03,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-06 00:01:03,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-06 00:01:03,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-06 00:01:03,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-06 00:01:03,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-06 00:01:03,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-06 00:01:03,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-06 00:01:03,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-06 00:01:03,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-06 00:01:03,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-06 00:01:03,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-06 00:01:03,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-06 00:01:03,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-06 00:01:03,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-06 00:01:03,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-06 00:01:03,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-06 00:01:03,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-06 00:01:03,436 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-10-06 00:01:03,480 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-06 00:01:03,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-06 00:01:03,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-06 00:01:03,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-06 00:01:03,483 INFO L138 SettingsManager]: * Use SBE=true [2020-10-06 00:01:03,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-06 00:01:03,484 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-06 00:01:03,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-06 00:01:03,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-06 00:01:03,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-06 00:01:03,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-06 00:01:03,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-06 00:01:03,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-06 00:01:03,487 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-06 00:01:03,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-06 00:01:03,487 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-06 00:01:03,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-06 00:01:03,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-06 00:01:03,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-06 00:01:03,488 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-06 00:01:03,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-06 00:01:03,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-06 00:01:03,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-06 00:01:03,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-06 00:01:03,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-06 00:01:03,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-06 00:01:03,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-06 00:01:03,490 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-06 00:01:03,490 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-06 00:01:03,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-06 00:01:03,490 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-06 00:01:03,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-06 00:01:03,813 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-06 00:01:03,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-06 00:01:03,818 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-06 00:01:03,819 INFO L275 PluginConnector]: CDTParser initialized [2020-10-06 00:01:03,820 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-06 00:01:03,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7686de7e/e84e1e01b85f41409479ba6c9456f49d/FLAG93f6c6954 [2020-10-06 00:01:04,447 INFO L306 CDTParser]: Found 1 translation units. [2020-10-06 00:01:04,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-06 00:01:04,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7686de7e/e84e1e01b85f41409479ba6c9456f49d/FLAG93f6c6954 [2020-10-06 00:01:04,696 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7686de7e/e84e1e01b85f41409479ba6c9456f49d [2020-10-06 00:01:04,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-06 00:01:04,707 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-06 00:01:04,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-06 00:01:04,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-06 00:01:04,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-06 00:01:04,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 12:01:04" (1/1) ... [2020-10-06 00:01:04,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e6e23f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 12:01:04, skipping insertion in model container [2020-10-06 00:01:04,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 12:01:04" (1/1) ... [2020-10-06 00:01:04,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-06 00:01:04,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-06 00:01:05,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-06 00:01:05,336 INFO L203 MainTranslator]: Completed pre-run [2020-10-06 00:01:05,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-06 00:01:05,472 INFO L208 MainTranslator]: Completed translation [2020-10-06 00:01:05,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 12:01:05 WrapperNode [2020-10-06 00:01:05,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-06 00:01:05,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-06 00:01:05,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-06 00:01:05,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-06 00:01:05,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 12:01:05" (1/1) ... [2020-10-06 00:01:05,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 12:01:05" (1/1) ... [2020-10-06 00:01:05,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-06 00:01:05,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-06 00:01:05,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-06 00:01:05,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-06 00:01:05,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 12:01:05" (1/1) ... [2020-10-06 00:01:05,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 12:01:05" (1/1) ... [2020-10-06 00:01:05,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 12:01:05" (1/1) ... [2020-10-06 00:01:05,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 12:01:05" (1/1) ... [2020-10-06 00:01:05,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 12:01:05" (1/1) ... [2020-10-06 00:01:05,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 12:01:05" (1/1) ... [2020-10-06 00:01:05,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 12:01:05" (1/1) ... [2020-10-06 00:01:05,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-06 00:01:05,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-06 00:01:05,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-06 00:01:05,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-06 00:01:05,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 12:01:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-06 00:01:05,642 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-06 00:01:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-06 00:01:05,642 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-06 00:01:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-06 00:01:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-06 00:01:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-06 00:01:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-06 00:01:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-06 00:01:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-06 00:01:05,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-06 00:01:05,652 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-06 00:01:06,024 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-06 00:01:06,025 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-06 00:01:06,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 12:01:06 BoogieIcfgContainer [2020-10-06 00:01:06,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-06 00:01:06,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-06 00:01:06,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-06 00:01:06,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-06 00:01:06,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.10 12:01:04" (1/3) ... [2020-10-06 00:01:06,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4befac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 12:01:06, skipping insertion in model container [2020-10-06 00:01:06,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 12:01:05" (2/3) ... [2020-10-06 00:01:06,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4befac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 12:01:06, skipping insertion in model container [2020-10-06 00:01:06,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 12:01:06" (3/3) ... [2020-10-06 00:01:06,038 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-06 00:01:06,049 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-06 00:01:06,049 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-06 00:01:06,055 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-06 00:01:06,056 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-06 00:01:06,083 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,083 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,083 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,084 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,084 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,085 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,085 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,085 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,085 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,086 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,086 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,086 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,087 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,087 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,087 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,088 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,088 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,088 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,088 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,089 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,089 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,089 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,089 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,090 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,090 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,090 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,091 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,091 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,095 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,095 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,095 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,096 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,096 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,096 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,105 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,106 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,106 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,106 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,107 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,107 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 00:01:06,126 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-06 00:01:06,147 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-06 00:01:06,148 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-06 00:01:06,148 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-06 00:01:06,148 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-10-06 00:01:06,148 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-06 00:01:06,148 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-06 00:01:06,148 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-06 00:01:06,149 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-06 00:01:06,165 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-06 00:01:06,166 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-06 00:01:06,212 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-06 00:01:06,212 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-06 00:01:06,218 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. [2020-10-06 00:01:06,221 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-06 00:01:06,241 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-06 00:01:06,241 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-06 00:01:06,242 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. [2020-10-06 00:01:06,244 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-10-06 00:01:06,245 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-06 00:01:07,241 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-06 00:01:07,466 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-10-06 00:01:07,466 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-10-06 00:01:07,471 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-06 00:01:07,483 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-06 00:01:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-06 00:01:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-06 00:01:07,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:07,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-06 00:01:07,495 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:07,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:07,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-06 00:01:07,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:07,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500787727] [2020-10-06 00:01:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:07,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500787727] [2020-10-06 00:01:07,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-06 00:01:07,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-06 00:01:07,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1452865719] [2020-10-06 00:01:07,789 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:07,793 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:07,808 INFO L258 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-10-06 00:01:07,808 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:07,814 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-06 00:01:07,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-06 00:01:07,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:07,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-06 00:01:07,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-06 00:01:07,835 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-06 00:01:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:07,901 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-06 00:01:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-06 00:01:07,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-06 00:01:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:07,915 INFO L225 Difference]: With dead ends: 75 [2020-10-06 00:01:07,915 INFO L226 Difference]: Without dead ends: 42 [2020-10-06 00:01:07,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-06 00:01:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-06 00:01:07,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-06 00:01:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-06 00:01:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-06 00:01:07,962 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-06 00:01:07,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:07,962 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-06 00:01:07,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-06 00:01:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-06 00:01:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-06 00:01:07,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:07,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:07,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-06 00:01:07,965 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:07,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:07,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-06 00:01:07,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:07,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148778461] [2020-10-06 00:01:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:08,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148778461] [2020-10-06 00:01:08,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-06 00:01:08,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-06 00:01:08,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [580941644] [2020-10-06 00:01:08,095 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:08,096 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:08,099 INFO L258 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-10-06 00:01:08,100 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:08,126 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-06 00:01:08,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-06 00:01:08,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:08,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-06 00:01:08,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-06 00:01:08,129 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-06 00:01:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:08,170 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-06 00:01:08,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-06 00:01:08,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-06 00:01:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:08,173 INFO L225 Difference]: With dead ends: 56 [2020-10-06 00:01:08,173 INFO L226 Difference]: Without dead ends: 50 [2020-10-06 00:01:08,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-06 00:01:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-06 00:01:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-06 00:01:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-06 00:01:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-06 00:01:08,183 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-06 00:01:08,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:08,184 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-06 00:01:08,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-06 00:01:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-06 00:01:08,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-06 00:01:08,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:08,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:08,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-06 00:01:08,186 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:08,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-06 00:01:08,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:08,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156715835] [2020-10-06 00:01:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:08,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156715835] [2020-10-06 00:01:08,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-06 00:01:08,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-06 00:01:08,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1059410549] [2020-10-06 00:01:08,267 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:08,268 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:08,271 INFO L258 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-10-06 00:01:08,272 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:08,301 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:08,302 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:08,329 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:01:08,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-06 00:01:08,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:08,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-06 00:01:08,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-06 00:01:08,331 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-10-06 00:01:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:08,473 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-10-06 00:01:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-06 00:01:08,474 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-06 00:01:08,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:08,475 INFO L225 Difference]: With dead ends: 62 [2020-10-06 00:01:08,475 INFO L226 Difference]: Without dead ends: 44 [2020-10-06 00:01:08,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-06 00:01:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-06 00:01:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-10-06 00:01:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-06 00:01:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-06 00:01:08,483 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-10-06 00:01:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:08,483 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-06 00:01:08,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-06 00:01:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-06 00:01:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-06 00:01:08,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:08,485 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:08,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-06 00:01:08,485 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:08,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:08,486 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-10-06 00:01:08,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:08,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712819902] [2020-10-06 00:01:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:08,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712819902] [2020-10-06 00:01:08,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915302247] [2020-10-06 00:01:08,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:08,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:01:08,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:08,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-06 00:01:08,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:08,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:08,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-06 00:01:08,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1773703689] [2020-10-06 00:01:08,740 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:08,741 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:08,744 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-10-06 00:01:08,745 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:08,763 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:08,764 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:08,787 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:08,787 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:08,828 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:08,828 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:08,844 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:08,844 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:08,854 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-06 00:01:08,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-06 00:01:08,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:08,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-06 00:01:08,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-06 00:01:08,855 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-10-06 00:01:08,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:08,994 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-06 00:01:08,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-06 00:01:08,995 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-06 00:01:08,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:08,996 INFO L225 Difference]: With dead ends: 56 [2020-10-06 00:01:08,996 INFO L226 Difference]: Without dead ends: 50 [2020-10-06 00:01:08,997 INFO L675 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 [2020-10-06 00:01:08,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-06 00:01:09,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-06 00:01:09,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-06 00:01:09,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-10-06 00:01:09,029 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-10-06 00:01:09,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:09,029 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-10-06 00:01:09,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-06 00:01:09,030 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-10-06 00:01:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-06 00:01:09,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:09,033 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:09,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:09,248 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:09,249 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-10-06 00:01:09,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:09,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285838750] [2020-10-06 00:01:09,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:09,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285838750] [2020-10-06 00:01:09,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441510366] [2020-10-06 00:01:09,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:09,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-06 00:01:09,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:09,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-06 00:01:09,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:09,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:09,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-06 00:01:09,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1787225198] [2020-10-06 00:01:09,416 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:09,417 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:09,419 INFO L258 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-10-06 00:01:09,420 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:09,436 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:09,436 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:09,453 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-06 00:01:09,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-06 00:01:09,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:09,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-06 00:01:09,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-06 00:01:09,454 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-10-06 00:01:09,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:09,633 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-10-06 00:01:09,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-06 00:01:09,634 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-06 00:01:09,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:09,635 INFO L225 Difference]: With dead ends: 66 [2020-10-06 00:01:09,635 INFO L226 Difference]: Without dead ends: 54 [2020-10-06 00:01:09,636 INFO L675 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 [2020-10-06 00:01:09,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-06 00:01:09,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-10-06 00:01:09,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-06 00:01:09,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-10-06 00:01:09,641 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-10-06 00:01:09,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:09,642 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-10-06 00:01:09,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-06 00:01:09,642 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-10-06 00:01:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-06 00:01:09,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:09,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:09,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:09,857 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:09,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-10-06 00:01:09,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:09,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643229433] [2020-10-06 00:01:09,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:09,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643229433] [2020-10-06 00:01:09,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478643302] [2020-10-06 00:01:09,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:10,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:01:10,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:10,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-06 00:01:10,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:10,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:10,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-06 00:01:10,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [606334673] [2020-10-06 00:01:10,052 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:10,054 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:10,056 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-10-06 00:01:10,056 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:10,070 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:10,070 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:10,097 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:01:10,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-06 00:01:10,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:10,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-06 00:01:10,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-06 00:01:10,099 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-10-06 00:01:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:10,255 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-10-06 00:01:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-06 00:01:10,257 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-06 00:01:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:10,258 INFO L225 Difference]: With dead ends: 64 [2020-10-06 00:01:10,259 INFO L226 Difference]: Without dead ends: 58 [2020-10-06 00:01:10,259 INFO L675 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 [2020-10-06 00:01:10,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-06 00:01:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-06 00:01:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-06 00:01:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-10-06 00:01:10,269 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-10-06 00:01:10,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:10,269 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-10-06 00:01:10,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-06 00:01:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-10-06 00:01:10,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-06 00:01:10,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:10,271 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:10,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:10,482 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:10,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-10-06 00:01:10,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:10,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986334352] [2020-10-06 00:01:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:10,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986334352] [2020-10-06 00:01:10,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193229198] [2020-10-06 00:01:10,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:10,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:01:10,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:10,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-06 00:01:10,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:10,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:10,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-06 00:01:10,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [405809941] [2020-10-06 00:01:10,651 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:10,652 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:10,655 INFO L258 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-10-06 00:01:10,655 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:10,670 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:10,670 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:10,693 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:01:10,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-06 00:01:10,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:10,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-06 00:01:10,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-06 00:01:10,695 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-10-06 00:01:10,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:10,922 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-10-06 00:01:10,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-06 00:01:10,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-06 00:01:10,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:10,923 INFO L225 Difference]: With dead ends: 63 [2020-10-06 00:01:10,923 INFO L226 Difference]: Without dead ends: 51 [2020-10-06 00:01:10,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-10-06 00:01:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-06 00:01:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-10-06 00:01:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-06 00:01:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-06 00:01:10,929 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-10-06 00:01:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:10,929 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-06 00:01:10,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-06 00:01:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-06 00:01:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-06 00:01:10,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:10,931 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:11,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:11,143 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:11,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-10-06 00:01:11,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:11,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788221001] [2020-10-06 00:01:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:11,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788221001] [2020-10-06 00:01:11,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469250914] [2020-10-06 00:01:11,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:11,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-06 00:01:11,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:11,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-06 00:01:11,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:11,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:11,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-06 00:01:11,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1566207876] [2020-10-06 00:01:11,297 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:11,300 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:11,306 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-10-06 00:01:11,306 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:11,332 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:11,332 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:11,349 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:11,350 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:11,388 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:11,389 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:11,398 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:11,398 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:11,414 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-06 00:01:11,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-06 00:01:11,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:11,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-06 00:01:11,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-06 00:01:11,415 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-10-06 00:01:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:11,591 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-10-06 00:01:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-06 00:01:11,598 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-06 00:01:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:11,599 INFO L225 Difference]: With dead ends: 60 [2020-10-06 00:01:11,600 INFO L226 Difference]: Without dead ends: 54 [2020-10-06 00:01:11,600 INFO L675 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 [2020-10-06 00:01:11,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-06 00:01:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-06 00:01:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-06 00:01:11,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-06 00:01:11,608 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-10-06 00:01:11,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:11,609 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-06 00:01:11,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-06 00:01:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-06 00:01:11,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-06 00:01:11,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:11,614 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:11,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:11,828 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:11,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:11,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-10-06 00:01:11,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:11,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219395412] [2020-10-06 00:01:11,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:11,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219395412] [2020-10-06 00:01:11,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942159304] [2020-10-06 00:01:11,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:11,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-06 00:01:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:12,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:12,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-06 00:01:12,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [441473061] [2020-10-06 00:01:12,016 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:12,017 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:12,019 INFO L258 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-06 00:01:12,020 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:12,045 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:12,045 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:12,059 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-06 00:01:12,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-06 00:01:12,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:12,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-06 00:01:12,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-06 00:01:12,061 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-10-06 00:01:12,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:12,317 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-06 00:01:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-06 00:01:12,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-06 00:01:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:12,318 INFO L225 Difference]: With dead ends: 74 [2020-10-06 00:01:12,318 INFO L226 Difference]: Without dead ends: 68 [2020-10-06 00:01:12,319 INFO L675 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 [2020-10-06 00:01:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-06 00:01:12,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-06 00:01:12,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-06 00:01:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-10-06 00:01:12,327 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-10-06 00:01:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:12,328 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-10-06 00:01:12,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-06 00:01:12,328 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-10-06 00:01:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-06 00:01:12,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:12,329 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:12,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:12,532 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:12,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-10-06 00:01:12,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:12,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999484104] [2020-10-06 00:01:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:12,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999484104] [2020-10-06 00:01:12,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101370877] [2020-10-06 00:01:12,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:12,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:01:12,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:12,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-06 00:01:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:12,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:12,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-06 00:01:12,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1124560526] [2020-10-06 00:01:12,687 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:12,688 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:12,691 INFO L258 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-06 00:01:12,691 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:12,705 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:12,705 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:12,722 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:01:12,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-06 00:01:12,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:12,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-06 00:01:12,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-06 00:01:12,723 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-10-06 00:01:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:13,003 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-10-06 00:01:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-06 00:01:13,005 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-06 00:01:13,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:13,006 INFO L225 Difference]: With dead ends: 74 [2020-10-06 00:01:13,006 INFO L226 Difference]: Without dead ends: 62 [2020-10-06 00:01:13,007 INFO L675 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 [2020-10-06 00:01:13,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-06 00:01:13,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-10-06 00:01:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-06 00:01:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-06 00:01:13,011 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-10-06 00:01:13,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:13,011 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-06 00:01:13,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-06 00:01:13,011 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-06 00:01:13,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-06 00:01:13,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:13,012 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:13,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-06 00:01:13,223 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:13,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-10-06 00:01:13,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:13,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874098082] [2020-10-06 00:01:13,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:13,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874098082] [2020-10-06 00:01:13,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028505875] [2020-10-06 00:01:13,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:13,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-06 00:01:13,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:13,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-06 00:01:13,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:13,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:13,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-06 00:01:13,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [722452865] [2020-10-06 00:01:13,411 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:13,413 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:13,418 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-10-06 00:01:13,418 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:13,456 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:13,457 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:13,472 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:01:13,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-06 00:01:13,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:13,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-06 00:01:13,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-06 00:01:13,473 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-10-06 00:01:13,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:13,678 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-10-06 00:01:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-06 00:01:13,680 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-06 00:01:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:13,681 INFO L225 Difference]: With dead ends: 70 [2020-10-06 00:01:13,681 INFO L226 Difference]: Without dead ends: 64 [2020-10-06 00:01:13,682 INFO L675 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 [2020-10-06 00:01:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-06 00:01:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-10-06 00:01:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-06 00:01:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-10-06 00:01:13,687 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-10-06 00:01:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:13,687 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-10-06 00:01:13,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-06 00:01:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-10-06 00:01:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-06 00:01:13,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:13,688 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:13,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-06 00:01:13,900 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:13,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-10-06 00:01:13,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:13,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197343888] [2020-10-06 00:01:13,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:14,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197343888] [2020-10-06 00:01:14,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128433187] [2020-10-06 00:01:14,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:14,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:01:14,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:14,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-06 00:01:14,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:14,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:14,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-06 00:01:14,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1838740411] [2020-10-06 00:01:14,074 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:14,078 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:14,081 INFO L258 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-10-06 00:01:14,081 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:14,099 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:14,099 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:14,117 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:01:14,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-06 00:01:14,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:14,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-06 00:01:14,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-06 00:01:14,118 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-10-06 00:01:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:14,386 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-06 00:01:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-06 00:01:14,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-06 00:01:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:14,387 INFO L225 Difference]: With dead ends: 69 [2020-10-06 00:01:14,387 INFO L226 Difference]: Without dead ends: 63 [2020-10-06 00:01:14,388 INFO L675 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 [2020-10-06 00:01:14,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-06 00:01:14,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-10-06 00:01:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-06 00:01:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-10-06 00:01:14,393 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-10-06 00:01:14,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:14,393 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-10-06 00:01:14,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-06 00:01:14,394 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-10-06 00:01:14,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-06 00:01:14,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:14,394 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:14,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:14,606 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:14,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:14,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-10-06 00:01:14,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:14,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932300476] [2020-10-06 00:01:14,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:14,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932300476] [2020-10-06 00:01:14,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417349098] [2020-10-06 00:01:14,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:14,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-06 00:01:14,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:14,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-06 00:01:14,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:14,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:14,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-06 00:01:14,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [183632946] [2020-10-06 00:01:14,761 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:14,762 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:14,765 INFO L258 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-10-06 00:01:14,765 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:14,787 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:14,787 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:14,815 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:01:14,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-06 00:01:14,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:14,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-06 00:01:14,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-06 00:01:14,816 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-10-06 00:01:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:15,146 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-10-06 00:01:15,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-06 00:01:15,147 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-06 00:01:15,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:15,148 INFO L225 Difference]: With dead ends: 69 [2020-10-06 00:01:15,148 INFO L226 Difference]: Without dead ends: 57 [2020-10-06 00:01:15,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-06 00:01:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-06 00:01:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-10-06 00:01:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-06 00:01:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-06 00:01:15,153 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-10-06 00:01:15,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:15,153 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-06 00:01:15,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-06 00:01:15,153 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-06 00:01:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-06 00:01:15,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:15,154 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:15,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:15,362 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:15,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-10-06 00:01:15,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:15,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142195614] [2020-10-06 00:01:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:15,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142195614] [2020-10-06 00:01:15,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760067810] [2020-10-06 00:01:15,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:15,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-06 00:01:15,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:15,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-06 00:01:15,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:15,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:15,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-06 00:01:15,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1334614212] [2020-10-06 00:01:15,527 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:15,528 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:15,532 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-10-06 00:01:15,532 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:15,543 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:15,543 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:15,561 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:15,562 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:15,572 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:15,573 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:15,581 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:15,581 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:15,592 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-06 00:01:15,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-06 00:01:15,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:15,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-06 00:01:15,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-06 00:01:15,594 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-10-06 00:01:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:15,805 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-10-06 00:01:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-06 00:01:15,806 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-06 00:01:15,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:15,808 INFO L225 Difference]: With dead ends: 66 [2020-10-06 00:01:15,808 INFO L226 Difference]: Without dead ends: 60 [2020-10-06 00:01:15,809 INFO L675 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 [2020-10-06 00:01:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-06 00:01:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-06 00:01:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-06 00:01:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-06 00:01:15,813 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-10-06 00:01:15,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:15,814 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-06 00:01:15,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-06 00:01:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-06 00:01:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-06 00:01:15,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:15,815 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:16,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-06 00:01:16,027 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:16,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:16,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-10-06 00:01:16,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:16,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999056163] [2020-10-06 00:01:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:16,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999056163] [2020-10-06 00:01:16,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562945037] [2020-10-06 00:01:16,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:16,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-06 00:01:16,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:16,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:16,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-06 00:01:16,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1845066224] [2020-10-06 00:01:16,203 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:16,204 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:16,207 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-06 00:01:16,207 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:16,223 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:16,224 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:16,253 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-06 00:01:16,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-06 00:01:16,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:16,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-06 00:01:16,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-06 00:01:16,254 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-10-06 00:01:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:16,552 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-10-06 00:01:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-06 00:01:16,552 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-06 00:01:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:16,553 INFO L225 Difference]: With dead ends: 82 [2020-10-06 00:01:16,553 INFO L226 Difference]: Without dead ends: 76 [2020-10-06 00:01:16,554 INFO L675 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 [2020-10-06 00:01:16,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-06 00:01:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-06 00:01:16,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-06 00:01:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-10-06 00:01:16,559 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-10-06 00:01:16,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:16,560 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-10-06 00:01:16,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-06 00:01:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-10-06 00:01:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-06 00:01:16,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:16,561 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:16,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-06 00:01:16,772 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:16,772 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-10-06 00:01:16,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:16,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868420402] [2020-10-06 00:01:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:16,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868420402] [2020-10-06 00:01:16,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527028391] [2020-10-06 00:01:16,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:16,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:01:16,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:16,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-06 00:01:16,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:16,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:16,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-06 00:01:16,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [419841827] [2020-10-06 00:01:16,950 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:16,951 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:16,953 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-06 00:01:16,954 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:16,963 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:16,963 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:16,983 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:01:16,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-06 00:01:16,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:16,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-06 00:01:16,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-06 00:01:16,985 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-10-06 00:01:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:17,326 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-06 00:01:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-06 00:01:17,326 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-06 00:01:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:17,327 INFO L225 Difference]: With dead ends: 81 [2020-10-06 00:01:17,327 INFO L226 Difference]: Without dead ends: 75 [2020-10-06 00:01:17,328 INFO L675 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 [2020-10-06 00:01:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-06 00:01:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-10-06 00:01:17,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-06 00:01:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-10-06 00:01:17,335 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-10-06 00:01:17,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:17,335 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-10-06 00:01:17,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-06 00:01:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-10-06 00:01:17,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-06 00:01:17,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:17,336 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:17,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-06 00:01:17,537 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:17,538 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-10-06 00:01:17,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:17,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392169425] [2020-10-06 00:01:17,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:17,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392169425] [2020-10-06 00:01:17,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076083859] [2020-10-06 00:01:17,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:17,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-06 00:01:17,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:17,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-06 00:01:17,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:17,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:17,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-06 00:01:17,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1949317543] [2020-10-06 00:01:17,717 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:17,718 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:17,720 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-06 00:01:17,720 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:17,722 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:17,722 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:17,748 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:01:17,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-06 00:01:17,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:17,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-06 00:01:17,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-06 00:01:17,749 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-10-06 00:01:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:18,158 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-10-06 00:01:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-06 00:01:18,159 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-06 00:01:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:18,160 INFO L225 Difference]: With dead ends: 82 [2020-10-06 00:01:18,160 INFO L226 Difference]: Without dead ends: 70 [2020-10-06 00:01:18,161 INFO L675 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 [2020-10-06 00:01:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-06 00:01:18,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-10-06 00:01:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-06 00:01:18,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-06 00:01:18,165 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-10-06 00:01:18,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:18,165 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-06 00:01:18,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-06 00:01:18,165 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-06 00:01:18,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-06 00:01:18,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:18,166 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:18,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:18,367 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:18,368 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-10-06 00:01:18,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:18,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289035441] [2020-10-06 00:01:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:18,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289035441] [2020-10-06 00:01:18,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272638394] [2020-10-06 00:01:18,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:18,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:01:18,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:18,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-06 00:01:18,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:18,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:18,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-06 00:01:18,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [334349494] [2020-10-06 00:01:18,577 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:18,579 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:18,583 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-10-06 00:01:18,583 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:18,588 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:18,589 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:18,616 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:01:18,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-06 00:01:18,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:18,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-06 00:01:18,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-06 00:01:18,617 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-10-06 00:01:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:18,845 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-06 00:01:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-06 00:01:18,845 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-06 00:01:18,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:18,846 INFO L225 Difference]: With dead ends: 78 [2020-10-06 00:01:18,846 INFO L226 Difference]: Without dead ends: 72 [2020-10-06 00:01:18,847 INFO L675 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 [2020-10-06 00:01:18,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-06 00:01:18,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-06 00:01:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-06 00:01:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-10-06 00:01:18,850 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-10-06 00:01:18,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:18,851 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-10-06 00:01:18,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-06 00:01:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-10-06 00:01:18,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-06 00:01:18,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:18,852 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:19,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-06 00:01:19,062 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:19,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-10-06 00:01:19,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:19,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151356534] [2020-10-06 00:01:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:19,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151356534] [2020-10-06 00:01:19,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121701693] [2020-10-06 00:01:19,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:19,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-06 00:01:19,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-06 00:01:19,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:19,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:19,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-06 00:01:19,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [972194569] [2020-10-06 00:01:19,223 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:19,225 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:19,227 INFO L258 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-06 00:01:19,228 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:19,231 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:19,232 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:19,260 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:01:19,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-06 00:01:19,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:19,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-06 00:01:19,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-06 00:01:19,261 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-10-06 00:01:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:19,590 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-10-06 00:01:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-06 00:01:19,597 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-06 00:01:19,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:19,598 INFO L225 Difference]: With dead ends: 75 [2020-10-06 00:01:19,598 INFO L226 Difference]: Without dead ends: 69 [2020-10-06 00:01:19,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-06 00:01:19,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-06 00:01:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-06 00:01:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-06 00:01:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-06 00:01:19,602 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-10-06 00:01:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:19,602 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-06 00:01:19,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-06 00:01:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-06 00:01:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-06 00:01:19,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:19,603 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:19,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:19,814 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:19,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:19,815 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-10-06 00:01:19,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:19,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510688539] [2020-10-06 00:01:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:19,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510688539] [2020-10-06 00:01:19,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845243410] [2020-10-06 00:01:19,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:20,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-06 00:01:20,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:20,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-06 00:01:20,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:20,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:20,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-06 00:01:20,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [249728322] [2020-10-06 00:01:20,045 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:20,047 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:20,050 INFO L258 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-06 00:01:20,050 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:20,056 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:20,056 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:20,084 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:01:20,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-06 00:01:20,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:20,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-06 00:01:20,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-06 00:01:20,085 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-10-06 00:01:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:20,454 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-10-06 00:01:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-06 00:01:20,455 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-06 00:01:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:20,456 INFO L225 Difference]: With dead ends: 75 [2020-10-06 00:01:20,456 INFO L226 Difference]: Without dead ends: 69 [2020-10-06 00:01:20,457 INFO L675 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 [2020-10-06 00:01:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-06 00:01:20,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-10-06 00:01:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-06 00:01:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-10-06 00:01:20,463 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-10-06 00:01:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:20,463 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-10-06 00:01:20,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-06 00:01:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-10-06 00:01:20,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-06 00:01:20,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:20,465 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:20,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:20,670 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:20,671 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-10-06 00:01:20,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:20,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53841943] [2020-10-06 00:01:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:20,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53841943] [2020-10-06 00:01:20,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660563773] [2020-10-06 00:01:20,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:20,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-06 00:01:20,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:20,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:20,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-06 00:01:20,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1773184713] [2020-10-06 00:01:20,813 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:20,814 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:20,817 INFO L258 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-06 00:01:20,817 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:20,820 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:20,820 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:20,847 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-06 00:01:20,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-06 00:01:20,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:20,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-06 00:01:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-06 00:01:20,848 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-10-06 00:01:21,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:21,283 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-10-06 00:01:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-06 00:01:21,283 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-06 00:01:21,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:21,285 INFO L225 Difference]: With dead ends: 75 [2020-10-06 00:01:21,285 INFO L226 Difference]: Without dead ends: 63 [2020-10-06 00:01:21,286 INFO L675 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 [2020-10-06 00:01:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-06 00:01:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-06 00:01:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-06 00:01:21,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-06 00:01:21,308 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-10-06 00:01:21,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:21,308 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-06 00:01:21,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-06 00:01:21,309 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-06 00:01:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-06 00:01:21,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:21,309 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:21,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-06 00:01:21,516 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:21,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:21,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-10-06 00:01:21,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:21,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018842099] [2020-10-06 00:01:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:21,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018842099] [2020-10-06 00:01:21,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402371431] [2020-10-06 00:01:21,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:21,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:01:21,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:21,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-06 00:01:21,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:21,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:21,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-06 00:01:21,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1202525289] [2020-10-06 00:01:21,710 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:21,712 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:21,717 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-10-06 00:01:21,718 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:21,724 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:21,725 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:21,752 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:21,753 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:21,768 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:21,768 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:21,786 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:21,786 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:21,795 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-06 00:01:21,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-06 00:01:21,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:21,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-06 00:01:21,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-06 00:01:21,797 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-10-06 00:01:22,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:22,112 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-10-06 00:01:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-06 00:01:22,112 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-06 00:01:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:22,113 INFO L225 Difference]: With dead ends: 72 [2020-10-06 00:01:22,113 INFO L226 Difference]: Without dead ends: 66 [2020-10-06 00:01:22,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-10-06 00:01:22,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-06 00:01:22,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-06 00:01:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-06 00:01:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-06 00:01:22,117 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-10-06 00:01:22,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:22,117 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-06 00:01:22,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-06 00:01:22,118 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-06 00:01:22,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-06 00:01:22,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:22,118 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:22,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:22,327 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:22,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:22,328 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-10-06 00:01:22,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:22,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277748010] [2020-10-06 00:01:22,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:22,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277748010] [2020-10-06 00:01:22,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5281553] [2020-10-06 00:01:22,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:22,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-06 00:01:22,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:22,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-06 00:01:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:22,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:22,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-06 00:01:22,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2028682969] [2020-10-06 00:01:22,515 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:22,516 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:22,519 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-06 00:01:22,520 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:22,521 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:22,521 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:22,549 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-06 00:01:22,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-06 00:01:22,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:22,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-06 00:01:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-06 00:01:22,550 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-10-06 00:01:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:22,891 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-10-06 00:01:22,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-06 00:01:22,891 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-06 00:01:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:22,892 INFO L225 Difference]: With dead ends: 92 [2020-10-06 00:01:22,892 INFO L226 Difference]: Without dead ends: 86 [2020-10-06 00:01:22,893 INFO L675 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 [2020-10-06 00:01:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-06 00:01:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-10-06 00:01:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-06 00:01:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-10-06 00:01:22,896 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-10-06 00:01:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:22,896 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-10-06 00:01:22,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-06 00:01:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-10-06 00:01:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-06 00:01:22,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:22,897 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:23,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-06 00:01:23,109 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:23,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-10-06 00:01:23,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:23,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086510337] [2020-10-06 00:01:23,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:23,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086510337] [2020-10-06 00:01:23,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455266213] [2020-10-06 00:01:23,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:23,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:01:23,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:23,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-06 00:01:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:23,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:23,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-06 00:01:23,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2060953340] [2020-10-06 00:01:23,307 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:23,309 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:23,312 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-06 00:01:23,312 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:23,323 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:23,324 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:23,342 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:01:23,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-06 00:01:23,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:23,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-06 00:01:23,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-06 00:01:23,344 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-10-06 00:01:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:23,760 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-10-06 00:01:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-06 00:01:23,761 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-06 00:01:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:23,762 INFO L225 Difference]: With dead ends: 89 [2020-10-06 00:01:23,762 INFO L226 Difference]: Without dead ends: 83 [2020-10-06 00:01:23,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-06 00:01:23,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-06 00:01:23,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-10-06 00:01:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-06 00:01:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-10-06 00:01:23,766 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-10-06 00:01:23,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:23,766 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-10-06 00:01:23,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-06 00:01:23,766 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-10-06 00:01:23,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-06 00:01:23,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:23,767 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:23,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-06 00:01:23,978 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:23,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:23,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-10-06 00:01:23,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:23,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106477102] [2020-10-06 00:01:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:24,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106477102] [2020-10-06 00:01:24,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209556710] [2020-10-06 00:01:24,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:24,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-06 00:01:24,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:24,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-06 00:01:24,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:24,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:24,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-06 00:01:24,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [387460967] [2020-10-06 00:01:24,149 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:24,150 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:24,153 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-06 00:01:24,154 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:24,155 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:24,155 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:24,188 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:01:24,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-06 00:01:24,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:24,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-06 00:01:24,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-06 00:01:24,189 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-10-06 00:01:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:24,642 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-10-06 00:01:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-06 00:01:24,642 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-06 00:01:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:24,643 INFO L225 Difference]: With dead ends: 89 [2020-10-06 00:01:24,643 INFO L226 Difference]: Without dead ends: 83 [2020-10-06 00:01:24,644 INFO L675 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 [2020-10-06 00:01:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-06 00:01:24,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-06 00:01:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-06 00:01:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-10-06 00:01:24,646 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-10-06 00:01:24,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:24,646 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-10-06 00:01:24,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-06 00:01:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-10-06 00:01:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-06 00:01:24,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:24,647 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:24,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:24,855 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:24,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-10-06 00:01:24,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:24,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294878337] [2020-10-06 00:01:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:24,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294878337] [2020-10-06 00:01:24,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099869838] [2020-10-06 00:01:24,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:25,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-06 00:01:25,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:25,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-06 00:01:25,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:25,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:25,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-06 00:01:25,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [796339630] [2020-10-06 00:01:25,053 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:25,054 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:25,056 INFO L258 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-06 00:01:25,056 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:25,057 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:25,057 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:25,095 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:01:25,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-06 00:01:25,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:25,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-06 00:01:25,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-06 00:01:25,096 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-10-06 00:01:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:25,682 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-10-06 00:01:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-06 00:01:25,683 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-06 00:01:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:25,684 INFO L225 Difference]: With dead ends: 90 [2020-10-06 00:01:25,684 INFO L226 Difference]: Without dead ends: 78 [2020-10-06 00:01:25,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2020-10-06 00:01:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-06 00:01:25,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-10-06 00:01:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-06 00:01:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-06 00:01:25,689 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-10-06 00:01:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:25,690 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-06 00:01:25,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-06 00:01:25,690 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-06 00:01:25,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-06 00:01:25,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:25,693 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:25,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-06 00:01:25,894 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:25,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:25,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-10-06 00:01:25,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:25,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793809604] [2020-10-06 00:01:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:26,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793809604] [2020-10-06 00:01:26,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905218901] [2020-10-06 00:01:26,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:26,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-06 00:01:26,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:26,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:26,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-06 00:01:26,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1242015199] [2020-10-06 00:01:26,191 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:26,195 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:26,200 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-10-06 00:01:26,200 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:26,217 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:26,217 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:26,248 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6427#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:01:26,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-06 00:01:26,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:26,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-06 00:01:26,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-06 00:01:26,250 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 15 states. [2020-10-06 00:01:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:26,656 INFO L93 Difference]: Finished difference Result 86 states and 198 transitions. [2020-10-06 00:01:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-06 00:01:26,657 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-06 00:01:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:26,658 INFO L225 Difference]: With dead ends: 86 [2020-10-06 00:01:26,658 INFO L226 Difference]: Without dead ends: 80 [2020-10-06 00:01:26,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2020-10-06 00:01:26,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-06 00:01:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-06 00:01:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-06 00:01:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 140 transitions. [2020-10-06 00:01:26,663 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 140 transitions. Word has length 18 [2020-10-06 00:01:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:26,664 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 140 transitions. [2020-10-06 00:01:26,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-06 00:01:26,664 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 140 transitions. [2020-10-06 00:01:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-06 00:01:26,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:26,666 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:26,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:26,879 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:26,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:26,879 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 26 times [2020-10-06 00:01:26,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:26,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589185723] [2020-10-06 00:01:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:27,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589185723] [2020-10-06 00:01:27,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961227141] [2020-10-06 00:01:27,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:27,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:01:27,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:27,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-06 00:01:27,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:27,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:27,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-06 00:01:27,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1568316215] [2020-10-06 00:01:27,094 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:27,096 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:27,121 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-06 00:01:27,121 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:27,133 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:27,134 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:27,161 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6719#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:01:27,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-06 00:01:27,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:27,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-06 00:01:27,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-06 00:01:27,162 INFO L87 Difference]: Start difference. First operand 57 states and 140 transitions. Second operand 15 states. [2020-10-06 00:01:27,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:27,526 INFO L93 Difference]: Finished difference Result 83 states and 194 transitions. [2020-10-06 00:01:27,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-06 00:01:27,527 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-06 00:01:27,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:27,528 INFO L225 Difference]: With dead ends: 83 [2020-10-06 00:01:27,529 INFO L226 Difference]: Without dead ends: 77 [2020-10-06 00:01:27,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2020-10-06 00:01:27,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-06 00:01:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-10-06 00:01:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-06 00:01:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 146 transitions. [2020-10-06 00:01:27,534 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 146 transitions. Word has length 18 [2020-10-06 00:01:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:27,534 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 146 transitions. [2020-10-06 00:01:27,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-06 00:01:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 146 transitions. [2020-10-06 00:01:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-06 00:01:27,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:27,535 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:27,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-06 00:01:27,748 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:27,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:27,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 27 times [2020-10-06 00:01:27,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:27,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890705873] [2020-10-06 00:01:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:27,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890705873] [2020-10-06 00:01:27,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225678823] [2020-10-06 00:01:27,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:27,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-06 00:01:27,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:27,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-06 00:01:27,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:28,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:28,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-06 00:01:28,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [375876642] [2020-10-06 00:01:28,030 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:28,033 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:28,038 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-06 00:01:28,039 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:28,051 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:28,052 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:28,080 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7016#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:01:28,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-06 00:01:28,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:28,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-06 00:01:28,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-06 00:01:28,082 INFO L87 Difference]: Start difference. First operand 59 states and 146 transitions. Second operand 15 states. [2020-10-06 00:01:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:28,513 INFO L93 Difference]: Finished difference Result 81 states and 192 transitions. [2020-10-06 00:01:28,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-06 00:01:28,514 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-06 00:01:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:28,515 INFO L225 Difference]: With dead ends: 81 [2020-10-06 00:01:28,515 INFO L226 Difference]: Without dead ends: 75 [2020-10-06 00:01:28,516 INFO L675 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 [2020-10-06 00:01:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-06 00:01:28,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-06 00:01:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-06 00:01:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 152 transitions. [2020-10-06 00:01:28,519 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 152 transitions. Word has length 18 [2020-10-06 00:01:28,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:28,520 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 152 transitions. [2020-10-06 00:01:28,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-06 00:01:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 152 transitions. [2020-10-06 00:01:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-06 00:01:28,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:28,520 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:28,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-06 00:01:28,730 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:28,731 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 28 times [2020-10-06 00:01:28,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:28,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808399071] [2020-10-06 00:01:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:28,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808399071] [2020-10-06 00:01:28,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697663658] [2020-10-06 00:01:28,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:28,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:01:28,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:28,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-06 00:01:28,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:28,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:28,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-06 00:01:28,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [279795010] [2020-10-06 00:01:28,907 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:28,908 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:28,912 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-06 00:01:28,913 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:28,923 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:28,924 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:28,941 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7319#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-06 00:01:28,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-06 00:01:28,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:28,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-06 00:01:28,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-06 00:01:28,943 INFO L87 Difference]: Start difference. First operand 61 states and 152 transitions. Second operand 15 states. [2020-10-06 00:01:29,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:29,439 INFO L93 Difference]: Finished difference Result 81 states and 195 transitions. [2020-10-06 00:01:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-06 00:01:29,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-06 00:01:29,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:29,440 INFO L225 Difference]: With dead ends: 81 [2020-10-06 00:01:29,440 INFO L226 Difference]: Without dead ends: 75 [2020-10-06 00:01:29,441 INFO L675 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 [2020-10-06 00:01:29,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-06 00:01:29,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-10-06 00:01:29,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-06 00:01:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-10-06 00:01:29,445 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 18 [2020-10-06 00:01:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:29,445 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-10-06 00:01:29,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-06 00:01:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-10-06 00:01:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-06 00:01:29,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:29,446 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:29,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:29,649 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:29,649 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 29 times [2020-10-06 00:01:29,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:29,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089646733] [2020-10-06 00:01:29,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:29,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089646733] [2020-10-06 00:01:29,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225245615] [2020-10-06 00:01:29,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:29,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-06 00:01:29,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:29,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-06 00:01:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:29,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:29,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-06 00:01:29,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [136863328] [2020-10-06 00:01:29,823 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:29,824 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:29,828 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-06 00:01:29,828 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:29,839 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:29,840 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:29,857 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7630#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-06 00:01:29,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-06 00:01:29,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:29,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-06 00:01:29,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-06 00:01:29,859 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 15 states. [2020-10-06 00:01:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:30,406 INFO L93 Difference]: Finished difference Result 81 states and 203 transitions. [2020-10-06 00:01:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-06 00:01:30,407 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-06 00:01:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:30,408 INFO L225 Difference]: With dead ends: 81 [2020-10-06 00:01:30,408 INFO L226 Difference]: Without dead ends: 69 [2020-10-06 00:01:30,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2020-10-06 00:01:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-06 00:01:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2020-10-06 00:01:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-06 00:01:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-06 00:01:30,411 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 18 [2020-10-06 00:01:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:30,412 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-06 00:01:30,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-06 00:01:30,412 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-06 00:01:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-06 00:01:30,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:30,412 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:30,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:30,621 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:30,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:30,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 30 times [2020-10-06 00:01:30,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:30,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012881673] [2020-10-06 00:01:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:30,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012881673] [2020-10-06 00:01:30,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455624925] [2020-10-06 00:01:30,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:30,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-06 00:01:30,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-06 00:01:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:30,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:30,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-06 00:01:30,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1951350529] [2020-10-06 00:01:30,847 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:30,849 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:30,853 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2020-10-06 00:01:30,853 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:30,855 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:30,855 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:30,882 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:30,883 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:30,907 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:30,907 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:30,920 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:30,920 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:30,927 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7923#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-06 00:01:30,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-06 00:01:30,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:30,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-06 00:01:30,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-06 00:01:30,929 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 16 states. [2020-10-06 00:01:31,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:31,274 INFO L93 Difference]: Finished difference Result 78 states and 182 transitions. [2020-10-06 00:01:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-06 00:01:31,275 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-06 00:01:31,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:31,276 INFO L225 Difference]: With dead ends: 78 [2020-10-06 00:01:31,276 INFO L226 Difference]: Without dead ends: 72 [2020-10-06 00:01:31,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2020-10-06 00:01:31,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-06 00:01:31,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-06 00:01:31,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-06 00:01:31,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-06 00:01:31,280 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 19 [2020-10-06 00:01:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:31,281 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-06 00:01:31,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-06 00:01:31,281 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-06 00:01:31,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-06 00:01:31,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:31,282 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:31,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-06 00:01:31,483 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:31,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:31,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 31 times [2020-10-06 00:01:31,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:31,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340404167] [2020-10-06 00:01:31,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:31,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340404167] [2020-10-06 00:01:31,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013858038] [2020-10-06 00:01:31,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-06 00:01:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-06 00:01:31,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:31,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:31,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-06 00:01:31,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1032394974] [2020-10-06 00:01:31,671 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:31,672 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:31,676 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-06 00:01:31,676 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:31,688 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:31,689 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:31,712 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8213#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-06 00:01:31,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-06 00:01:31,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:31,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-06 00:01:31,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-06 00:01:31,713 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 16 states. [2020-10-06 00:01:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:32,101 INFO L93 Difference]: Finished difference Result 102 states and 232 transitions. [2020-10-06 00:01:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-06 00:01:32,102 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-06 00:01:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:32,103 INFO L225 Difference]: With dead ends: 102 [2020-10-06 00:01:32,103 INFO L226 Difference]: Without dead ends: 96 [2020-10-06 00:01:32,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-10-06 00:01:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-06 00:01:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2020-10-06 00:01:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-06 00:01:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 148 transitions. [2020-10-06 00:01:32,106 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 148 transitions. Word has length 19 [2020-10-06 00:01:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:32,107 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 148 transitions. [2020-10-06 00:01:32,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-06 00:01:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 148 transitions. [2020-10-06 00:01:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-06 00:01:32,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:32,107 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:32,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:32,316 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:32,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:32,316 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 32 times [2020-10-06 00:01:32,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:32,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779358897] [2020-10-06 00:01:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:32,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779358897] [2020-10-06 00:01:32,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086887749] [2020-10-06 00:01:32,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:32,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:01:32,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:32,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-06 00:01:32,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:32,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:32,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-06 00:01:32,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [462342006] [2020-10-06 00:01:32,520 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:32,522 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:32,526 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-06 00:01:32,526 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:32,531 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:32,531 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:32,562 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8539#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:01:32,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-06 00:01:32,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-06 00:01:32,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-06 00:01:32,564 INFO L87 Difference]: Start difference. First operand 60 states and 148 transitions. Second operand 16 states. [2020-10-06 00:01:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:33,013 INFO L93 Difference]: Finished difference Result 99 states and 228 transitions. [2020-10-06 00:01:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-06 00:01:33,016 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-06 00:01:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:33,017 INFO L225 Difference]: With dead ends: 99 [2020-10-06 00:01:33,017 INFO L226 Difference]: Without dead ends: 93 [2020-10-06 00:01:33,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2020-10-06 00:01:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-06 00:01:33,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2020-10-06 00:01:33,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-06 00:01:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 154 transitions. [2020-10-06 00:01:33,020 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 154 transitions. Word has length 19 [2020-10-06 00:01:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:33,021 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 154 transitions. [2020-10-06 00:01:33,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-06 00:01:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 154 transitions. [2020-10-06 00:01:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-06 00:01:33,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:33,022 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:33,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-06 00:01:33,222 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:33,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:33,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 33 times [2020-10-06 00:01:33,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:33,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897968164] [2020-10-06 00:01:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:33,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897968164] [2020-10-06 00:01:33,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018983808] [2020-10-06 00:01:33,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:33,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-06 00:01:33,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:33,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-06 00:01:33,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:33,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:33,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-06 00:01:33,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1385363076] [2020-10-06 00:01:33,408 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:33,410 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:33,414 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-06 00:01:33,414 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:33,424 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:33,424 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:33,442 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8870#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:01:33,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-06 00:01:33,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:33,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-06 00:01:33,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-06 00:01:33,443 INFO L87 Difference]: Start difference. First operand 62 states and 154 transitions. Second operand 16 states. [2020-10-06 00:01:33,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:33,938 INFO L93 Difference]: Finished difference Result 97 states and 226 transitions. [2020-10-06 00:01:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-06 00:01:33,938 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-06 00:01:33,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:33,939 INFO L225 Difference]: With dead ends: 97 [2020-10-06 00:01:33,939 INFO L226 Difference]: Without dead ends: 91 [2020-10-06 00:01:33,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2020-10-06 00:01:33,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-06 00:01:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2020-10-06 00:01:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-06 00:01:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 160 transitions. [2020-10-06 00:01:33,943 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 160 transitions. Word has length 19 [2020-10-06 00:01:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:33,943 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 160 transitions. [2020-10-06 00:01:33,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-06 00:01:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 160 transitions. [2020-10-06 00:01:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-06 00:01:33,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:33,944 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:34,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-06 00:01:34,154 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:34,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:34,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 34 times [2020-10-06 00:01:34,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:34,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619102770] [2020-10-06 00:01:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:34,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619102770] [2020-10-06 00:01:34,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321855168] [2020-10-06 00:01:34,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:34,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:01:34,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:34,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-06 00:01:34,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:34,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:34,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-06 00:01:34,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1837038733] [2020-10-06 00:01:34,335 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:34,337 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:34,341 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-06 00:01:34,341 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:34,351 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:34,351 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:34,367 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9207#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:01:34,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-06 00:01:34,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:34,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-06 00:01:34,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-06 00:01:34,369 INFO L87 Difference]: Start difference. First operand 64 states and 160 transitions. Second operand 16 states. [2020-10-06 00:01:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:34,944 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-06 00:01:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-06 00:01:34,945 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-06 00:01:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:34,946 INFO L225 Difference]: With dead ends: 97 [2020-10-06 00:01:34,946 INFO L226 Difference]: Without dead ends: 91 [2020-10-06 00:01:34,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=1039, Unknown=0, NotChecked=0, Total=1482 [2020-10-06 00:01:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-06 00:01:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-06 00:01:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-06 00:01:34,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 168 transitions. [2020-10-06 00:01:34,952 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 168 transitions. Word has length 19 [2020-10-06 00:01:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:34,953 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 168 transitions. [2020-10-06 00:01:34,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-06 00:01:34,953 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 168 transitions. [2020-10-06 00:01:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-06 00:01:34,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:34,953 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:35,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-06 00:01:35,164 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:35,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 35 times [2020-10-06 00:01:35,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:35,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089317485] [2020-10-06 00:01:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:35,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089317485] [2020-10-06 00:01:35,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881094276] [2020-10-06 00:01:35,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:35,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-06 00:01:35,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:35,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-06 00:01:35,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:35,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:35,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-06 00:01:35,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1706712344] [2020-10-06 00:01:35,324 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:35,326 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:35,329 INFO L258 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-06 00:01:35,330 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:35,339 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:35,339 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:35,359 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9552#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-06 00:01:35,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-06 00:01:35,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:35,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-06 00:01:35,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-06 00:01:35,360 INFO L87 Difference]: Start difference. First operand 66 states and 168 transitions. Second operand 16 states. [2020-10-06 00:01:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:36,062 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-06 00:01:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-06 00:01:36,063 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-06 00:01:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:36,064 INFO L225 Difference]: With dead ends: 98 [2020-10-06 00:01:36,064 INFO L226 Difference]: Without dead ends: 86 [2020-10-06 00:01:36,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=526, Invalid=1114, Unknown=0, NotChecked=0, Total=1640 [2020-10-06 00:01:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-06 00:01:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2020-10-06 00:01:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-06 00:01:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-06 00:01:36,071 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 19 [2020-10-06 00:01:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:36,072 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-06 00:01:36,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-06 00:01:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-06 00:01:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-06 00:01:36,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:36,073 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:36,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-06 00:01:36,283 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:36,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:36,284 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 36 times [2020-10-06 00:01:36,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:36,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289242305] [2020-10-06 00:01:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:36,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289242305] [2020-10-06 00:01:36,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002160258] [2020-10-06 00:01:36,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:36,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-06 00:01:36,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:36,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-06 00:01:36,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:36,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:36,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-06 00:01:36,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1982717020] [2020-10-06 00:01:36,502 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:36,504 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:36,508 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2020-10-06 00:01:36,508 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:36,519 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:36,519 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:36,540 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9882#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:01:36,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-06 00:01:36,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:36,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-06 00:01:36,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-06 00:01:36,541 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 17 states. [2020-10-06 00:01:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:36,904 INFO L93 Difference]: Finished difference Result 94 states and 216 transitions. [2020-10-06 00:01:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-06 00:01:36,904 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-06 00:01:36,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:36,906 INFO L225 Difference]: With dead ends: 94 [2020-10-06 00:01:36,906 INFO L226 Difference]: Without dead ends: 88 [2020-10-06 00:01:36,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2020-10-06 00:01:36,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-06 00:01:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2020-10-06 00:01:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-06 00:01:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2020-10-06 00:01:36,910 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 20 [2020-10-06 00:01:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:36,910 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2020-10-06 00:01:36,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-06 00:01:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2020-10-06 00:01:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-06 00:01:36,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:36,911 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:37,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-06 00:01:37,121 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:37,121 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 37 times [2020-10-06 00:01:37,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:37,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814722612] [2020-10-06 00:01:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:37,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814722612] [2020-10-06 00:01:37,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333814006] [2020-10-06 00:01:37,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:37,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-06 00:01:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:37,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:37,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-06 00:01:37,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1340673850] [2020-10-06 00:01:37,327 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:37,328 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:37,331 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-06 00:01:37,331 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:37,343 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:37,343 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:37,376 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10202#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:01:37,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-06 00:01:37,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:37,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-06 00:01:37,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-06 00:01:37,377 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand 17 states. [2020-10-06 00:01:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:37,800 INFO L93 Difference]: Finished difference Result 91 states and 212 transitions. [2020-10-06 00:01:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-06 00:01:37,800 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-06 00:01:37,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:37,801 INFO L225 Difference]: With dead ends: 91 [2020-10-06 00:01:37,801 INFO L226 Difference]: Without dead ends: 85 [2020-10-06 00:01:37,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2020-10-06 00:01:37,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-06 00:01:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2020-10-06 00:01:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-06 00:01:37,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 156 transitions. [2020-10-06 00:01:37,805 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 156 transitions. Word has length 20 [2020-10-06 00:01:37,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:37,805 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 156 transitions. [2020-10-06 00:01:37,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-06 00:01:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 156 transitions. [2020-10-06 00:01:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-06 00:01:37,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:37,806 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:38,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-06 00:01:38,015 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:38,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 38 times [2020-10-06 00:01:38,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:38,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359817289] [2020-10-06 00:01:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:38,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359817289] [2020-10-06 00:01:38,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741363553] [2020-10-06 00:01:38,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:38,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:01:38,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:38,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-06 00:01:38,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:38,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:38,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-06 00:01:38,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [320957988] [2020-10-06 00:01:38,209 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:38,211 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:38,215 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-06 00:01:38,216 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:38,217 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:38,217 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:38,247 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10527#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:01:38,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-06 00:01:38,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:38,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-06 00:01:38,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-06 00:01:38,248 INFO L87 Difference]: Start difference. First operand 63 states and 156 transitions. Second operand 17 states. [2020-10-06 00:01:38,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:38,714 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2020-10-06 00:01:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-06 00:01:38,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-06 00:01:38,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:38,716 INFO L225 Difference]: With dead ends: 89 [2020-10-06 00:01:38,716 INFO L226 Difference]: Without dead ends: 83 [2020-10-06 00:01:38,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2020-10-06 00:01:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-06 00:01:38,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-10-06 00:01:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-06 00:01:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 162 transitions. [2020-10-06 00:01:38,719 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 162 transitions. Word has length 20 [2020-10-06 00:01:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:38,720 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 162 transitions. [2020-10-06 00:01:38,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-06 00:01:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 162 transitions. [2020-10-06 00:01:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-06 00:01:38,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:38,720 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:38,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-06 00:01:38,930 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:38,930 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 39 times [2020-10-06 00:01:38,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:38,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378232533] [2020-10-06 00:01:38,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:39,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378232533] [2020-10-06 00:01:39,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369955020] [2020-10-06 00:01:39,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:39,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-06 00:01:39,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:39,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-06 00:01:39,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:39,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:39,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-06 00:01:39,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1104960711] [2020-10-06 00:01:39,167 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:39,170 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:39,175 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-06 00:01:39,175 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:39,186 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:39,186 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:39,213 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10858#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-06 00:01:39,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-06 00:01:39,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:39,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-06 00:01:39,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-06 00:01:39,215 INFO L87 Difference]: Start difference. First operand 65 states and 162 transitions. Second operand 17 states. [2020-10-06 00:01:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:39,729 INFO L93 Difference]: Finished difference Result 87 states and 208 transitions. [2020-10-06 00:01:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-06 00:01:39,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-06 00:01:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:39,731 INFO L225 Difference]: With dead ends: 87 [2020-10-06 00:01:39,731 INFO L226 Difference]: Without dead ends: 81 [2020-10-06 00:01:39,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2020-10-06 00:01:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-06 00:01:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-10-06 00:01:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-06 00:01:39,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 168 transitions. [2020-10-06 00:01:39,734 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 168 transitions. Word has length 20 [2020-10-06 00:01:39,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:39,734 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 168 transitions. [2020-10-06 00:01:39,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-06 00:01:39,735 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 168 transitions. [2020-10-06 00:01:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-06 00:01:39,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:39,735 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:39,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:39,944 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:39,944 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 40 times [2020-10-06 00:01:39,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:39,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307594053] [2020-10-06 00:01:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:40,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307594053] [2020-10-06 00:01:40,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808077110] [2020-10-06 00:01:40,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:40,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:01:40,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:40,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-06 00:01:40,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:40,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:40,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-06 00:01:40,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1609700324] [2020-10-06 00:01:40,176 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:40,180 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:40,185 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-06 00:01:40,185 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:40,199 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:40,199 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:40,226 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11195#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-06 00:01:40,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-06 00:01:40,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:40,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-06 00:01:40,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-06 00:01:40,227 INFO L87 Difference]: Start difference. First operand 67 states and 168 transitions. Second operand 17 states. [2020-10-06 00:01:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:40,820 INFO L93 Difference]: Finished difference Result 87 states and 211 transitions. [2020-10-06 00:01:40,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-06 00:01:40,820 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-06 00:01:40,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:40,821 INFO L225 Difference]: With dead ends: 87 [2020-10-06 00:01:40,822 INFO L226 Difference]: Without dead ends: 81 [2020-10-06 00:01:40,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=456, Invalid=1104, Unknown=0, NotChecked=0, Total=1560 [2020-10-06 00:01:40,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-06 00:01:40,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-10-06 00:01:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-06 00:01:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 176 transitions. [2020-10-06 00:01:40,826 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 176 transitions. Word has length 20 [2020-10-06 00:01:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:40,826 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 176 transitions. [2020-10-06 00:01:40,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-06 00:01:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 176 transitions. [2020-10-06 00:01:40,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-06 00:01:40,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:40,827 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:41,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:41,040 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:41,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:41,040 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 41 times [2020-10-06 00:01:41,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:41,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140675398] [2020-10-06 00:01:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:41,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140675398] [2020-10-06 00:01:41,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372708568] [2020-10-06 00:01:41,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:41,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-06 00:01:41,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:41,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-06 00:01:41,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:41,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:41,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-06 00:01:41,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1405508258] [2020-10-06 00:01:41,251 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:41,253 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:41,256 INFO L258 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-06 00:01:41,256 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:41,266 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:41,266 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:41,288 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11540#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-06 00:01:41,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-06 00:01:41,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:41,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-06 00:01:41,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-06 00:01:41,289 INFO L87 Difference]: Start difference. First operand 69 states and 176 transitions. Second operand 17 states. [2020-10-06 00:01:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:41,959 INFO L93 Difference]: Finished difference Result 87 states and 219 transitions. [2020-10-06 00:01:41,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-06 00:01:41,959 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-06 00:01:41,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:41,960 INFO L225 Difference]: With dead ends: 87 [2020-10-06 00:01:41,960 INFO L226 Difference]: Without dead ends: 75 [2020-10-06 00:01:41,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=1182, Unknown=0, NotChecked=0, Total=1722 [2020-10-06 00:01:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-06 00:01:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-10-06 00:01:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-06 00:01:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-06 00:01:41,964 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 20 [2020-10-06 00:01:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:41,964 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-06 00:01:41,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-06 00:01:41,965 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-06 00:01:41,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-06 00:01:41,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:41,965 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:42,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:42,166 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:42,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:42,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 42 times [2020-10-06 00:01:42,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:42,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078753805] [2020-10-06 00:01:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:42,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078753805] [2020-10-06 00:01:42,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361249047] [2020-10-06 00:01:42,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:42,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-06 00:01:42,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:42,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-06 00:01:42,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:42,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:42,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-06 00:01:42,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [744281468] [2020-10-06 00:01:42,440 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:42,443 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:42,448 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2020-10-06 00:01:42,449 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:42,452 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:42,452 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:42,497 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:42,498 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:42,521 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:42,522 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:42,536 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:42,536 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:42,544 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11863#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-06 00:01:42,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-06 00:01:42,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:42,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-06 00:01:42,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-06 00:01:42,545 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 18 states. [2020-10-06 00:01:42,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:42,923 INFO L93 Difference]: Finished difference Result 84 states and 196 transitions. [2020-10-06 00:01:42,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-06 00:01:42,924 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-06 00:01:42,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:42,925 INFO L225 Difference]: With dead ends: 84 [2020-10-06 00:01:42,925 INFO L226 Difference]: Without dead ends: 78 [2020-10-06 00:01:42,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=304, Invalid=752, Unknown=0, NotChecked=0, Total=1056 [2020-10-06 00:01:42,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-06 00:01:42,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-06 00:01:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-06 00:01:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-06 00:01:42,929 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 21 [2020-10-06 00:01:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:42,929 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-06 00:01:42,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-06 00:01:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-06 00:01:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-06 00:01:42,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:42,930 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:43,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-06 00:01:43,139 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:43,139 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 43 times [2020-10-06 00:01:43,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:43,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349340798] [2020-10-06 00:01:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:43,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349340798] [2020-10-06 00:01:43,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46620021] [2020-10-06 00:01:43,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:43,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-06 00:01:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:43,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:43,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-06 00:01:43,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1859285962] [2020-10-06 00:01:43,362 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:43,364 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:43,368 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-06 00:01:43,368 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:43,369 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:43,369 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:43,395 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12179#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-06 00:01:43,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-06 00:01:43,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:43,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-06 00:01:43,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-06 00:01:43,396 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 18 states. [2020-10-06 00:01:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:43,854 INFO L93 Difference]: Finished difference Result 112 states and 254 transitions. [2020-10-06 00:01:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-06 00:01:43,855 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-06 00:01:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:43,856 INFO L225 Difference]: With dead ends: 112 [2020-10-06 00:01:43,856 INFO L226 Difference]: Without dead ends: 106 [2020-10-06 00:01:43,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2020-10-06 00:01:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-06 00:01:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2020-10-06 00:01:43,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-06 00:01:43,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 158 transitions. [2020-10-06 00:01:43,860 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 158 transitions. Word has length 21 [2020-10-06 00:01:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:43,861 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 158 transitions. [2020-10-06 00:01:43,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-06 00:01:43,861 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 158 transitions. [2020-10-06 00:01:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-06 00:01:43,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:43,862 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:44,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:44,074 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:44,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:44,074 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 44 times [2020-10-06 00:01:44,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:44,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319919094] [2020-10-06 00:01:44,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:44,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319919094] [2020-10-06 00:01:44,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612677341] [2020-10-06 00:01:44,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:44,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:01:44,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:44,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-06 00:01:44,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:44,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:44,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-06 00:01:44,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1003523552] [2020-10-06 00:01:44,287 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:44,289 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:44,293 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-06 00:01:44,293 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:44,296 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:44,296 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:44,325 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12535#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:01:44,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-06 00:01:44,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:44,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-06 00:01:44,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-06 00:01:44,326 INFO L87 Difference]: Start difference. First operand 64 states and 158 transitions. Second operand 18 states. [2020-10-06 00:01:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:44,849 INFO L93 Difference]: Finished difference Result 109 states and 250 transitions. [2020-10-06 00:01:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-06 00:01:44,850 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-06 00:01:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:44,851 INFO L225 Difference]: With dead ends: 109 [2020-10-06 00:01:44,851 INFO L226 Difference]: Without dead ends: 103 [2020-10-06 00:01:44,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2020-10-06 00:01:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-06 00:01:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 66. [2020-10-06 00:01:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-06 00:01:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 164 transitions. [2020-10-06 00:01:44,856 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 164 transitions. Word has length 21 [2020-10-06 00:01:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:44,856 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 164 transitions. [2020-10-06 00:01:44,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-06 00:01:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 164 transitions. [2020-10-06 00:01:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-06 00:01:44,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:44,857 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:45,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:45,066 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:45,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 45 times [2020-10-06 00:01:45,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:45,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121384368] [2020-10-06 00:01:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:45,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121384368] [2020-10-06 00:01:45,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800972474] [2020-10-06 00:01:45,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:45,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-06 00:01:45,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:45,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-06 00:01:45,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:45,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:45,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-06 00:01:45,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1202043380] [2020-10-06 00:01:45,306 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:45,308 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:45,312 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-06 00:01:45,312 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:45,322 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:45,322 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:45,346 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12896#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:01:45,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-06 00:01:45,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:45,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-06 00:01:45,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-06 00:01:45,347 INFO L87 Difference]: Start difference. First operand 66 states and 164 transitions. Second operand 18 states. [2020-10-06 00:01:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:45,927 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-10-06 00:01:45,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-06 00:01:45,928 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-06 00:01:45,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:45,929 INFO L225 Difference]: With dead ends: 107 [2020-10-06 00:01:45,929 INFO L226 Difference]: Without dead ends: 101 [2020-10-06 00:01:45,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2020-10-06 00:01:45,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-06 00:01:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-10-06 00:01:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-06 00:01:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 170 transitions. [2020-10-06 00:01:45,932 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 170 transitions. Word has length 21 [2020-10-06 00:01:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:45,932 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 170 transitions. [2020-10-06 00:01:45,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-06 00:01:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 170 transitions. [2020-10-06 00:01:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-06 00:01:45,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:45,933 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:46,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-06 00:01:46,141 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:46,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:46,141 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 46 times [2020-10-06 00:01:46,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:46,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410438751] [2020-10-06 00:01:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:46,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410438751] [2020-10-06 00:01:46,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797117982] [2020-10-06 00:01:46,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:46,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:01:46,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-06 00:01:46,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:46,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:46,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-06 00:01:46,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1783818008] [2020-10-06 00:01:46,336 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:46,338 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:46,342 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-06 00:01:46,342 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:46,343 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:46,344 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:46,379 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13263#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:01:46,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-06 00:01:46,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:46,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-06 00:01:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-06 00:01:46,380 INFO L87 Difference]: Start difference. First operand 68 states and 170 transitions. Second operand 18 states. [2020-10-06 00:01:47,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:47,037 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-06 00:01:47,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-06 00:01:47,038 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-06 00:01:47,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:47,039 INFO L225 Difference]: With dead ends: 105 [2020-10-06 00:01:47,039 INFO L226 Difference]: Without dead ends: 99 [2020-10-06 00:01:47,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=510, Invalid=1296, Unknown=0, NotChecked=0, Total=1806 [2020-10-06 00:01:47,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-06 00:01:47,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-10-06 00:01:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-06 00:01:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 176 transitions. [2020-10-06 00:01:47,043 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 176 transitions. Word has length 21 [2020-10-06 00:01:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:47,043 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 176 transitions. [2020-10-06 00:01:47,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-06 00:01:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 176 transitions. [2020-10-06 00:01:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-06 00:01:47,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:47,044 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:47,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-06 00:01:47,254 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:47,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:47,254 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 47 times [2020-10-06 00:01:47,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:47,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773149635] [2020-10-06 00:01:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:47,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773149635] [2020-10-06 00:01:47,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169565433] [2020-10-06 00:01:47,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:47,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-06 00:01:47,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:47,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-06 00:01:47,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:47,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:47,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-06 00:01:47,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [861433732] [2020-10-06 00:01:47,477 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:47,479 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:47,483 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-06 00:01:47,483 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:47,494 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:47,494 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:47,514 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13636#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-06 00:01:47,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-06 00:01:47,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:47,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-06 00:01:47,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-10-06 00:01:47,515 INFO L87 Difference]: Start difference. First operand 70 states and 176 transitions. Second operand 18 states. [2020-10-06 00:01:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:48,218 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2020-10-06 00:01:48,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-06 00:01:48,218 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-06 00:01:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:48,219 INFO L225 Difference]: With dead ends: 105 [2020-10-06 00:01:48,220 INFO L226 Difference]: Without dead ends: 99 [2020-10-06 00:01:48,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=593, Invalid=1387, Unknown=0, NotChecked=0, Total=1980 [2020-10-06 00:01:48,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-06 00:01:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2020-10-06 00:01:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-06 00:01:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 184 transitions. [2020-10-06 00:01:48,223 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 184 transitions. Word has length 21 [2020-10-06 00:01:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:48,223 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 184 transitions. [2020-10-06 00:01:48,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-06 00:01:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 184 transitions. [2020-10-06 00:01:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-06 00:01:48,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:48,224 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:48,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-06 00:01:48,424 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:48,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:48,425 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 48 times [2020-10-06 00:01:48,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:48,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098110117] [2020-10-06 00:01:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:48,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098110117] [2020-10-06 00:01:48,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631923737] [2020-10-06 00:01:48,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:48,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-06 00:01:48,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:48,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-06 00:01:48,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:48,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:48,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-06 00:01:48,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1474249596] [2020-10-06 00:01:48,631 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:48,633 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:48,637 INFO L258 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-06 00:01:48,638 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:48,643 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:48,644 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:48,671 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14017#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-06 00:01:48,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-06 00:01:48,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:48,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-06 00:01:48,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-06 00:01:48,672 INFO L87 Difference]: Start difference. First operand 72 states and 184 transitions. Second operand 18 states. [2020-10-06 00:01:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:49,447 INFO L93 Difference]: Finished difference Result 106 states and 259 transitions. [2020-10-06 00:01:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-06 00:01:49,448 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-06 00:01:49,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:49,449 INFO L225 Difference]: With dead ends: 106 [2020-10-06 00:01:49,449 INFO L226 Difference]: Without dead ends: 94 [2020-10-06 00:01:49,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=690, Invalid=1472, Unknown=0, NotChecked=0, Total=2162 [2020-10-06 00:01:49,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-06 00:01:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2020-10-06 00:01:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-06 00:01:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-06 00:01:49,453 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 21 [2020-10-06 00:01:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:49,453 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-06 00:01:49,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-06 00:01:49,453 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-06 00:01:49,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-06 00:01:49,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:49,454 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:49,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:49,655 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:49,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 49 times [2020-10-06 00:01:49,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:49,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846820615] [2020-10-06 00:01:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:49,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846820615] [2020-10-06 00:01:49,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011515384] [2020-10-06 00:01:49,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:49,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-06 00:01:49,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:49,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:49,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-06 00:01:49,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1770797402] [2020-10-06 00:01:49,915 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:49,918 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:49,922 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 38 transitions. [2020-10-06 00:01:49,923 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:49,928 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:49,928 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:49,957 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14379#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:01:49,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-06 00:01:49,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:49,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-06 00:01:49,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-06 00:01:49,958 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 19 states. [2020-10-06 00:01:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:50,384 INFO L93 Difference]: Finished difference Result 102 states and 234 transitions. [2020-10-06 00:01:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-06 00:01:50,385 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-06 00:01:50,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:50,387 INFO L225 Difference]: With dead ends: 102 [2020-10-06 00:01:50,387 INFO L226 Difference]: Without dead ends: 96 [2020-10-06 00:01:50,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-10-06 00:01:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-06 00:01:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2020-10-06 00:01:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-06 00:01:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 160 transitions. [2020-10-06 00:01:50,391 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 160 transitions. Word has length 22 [2020-10-06 00:01:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:50,391 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 160 transitions. [2020-10-06 00:01:50,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-06 00:01:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 160 transitions. [2020-10-06 00:01:50,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-06 00:01:50,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:50,392 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:50,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:50,593 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:50,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:50,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 50 times [2020-10-06 00:01:50,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:50,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970628466] [2020-10-06 00:01:50,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:50,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970628466] [2020-10-06 00:01:50,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306337329] [2020-10-06 00:01:50,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:50,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:01:50,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-06 00:01:50,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:50,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:50,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-06 00:01:50,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [741127260] [2020-10-06 00:01:50,877 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:50,879 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:50,883 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-06 00:01:50,883 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:50,886 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:50,887 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:50,914 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14727#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:01:50,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-06 00:01:50,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:50,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-06 00:01:50,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-10-06 00:01:50,916 INFO L87 Difference]: Start difference. First operand 65 states and 160 transitions. Second operand 19 states. [2020-10-06 00:01:51,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:51,416 INFO L93 Difference]: Finished difference Result 99 states and 230 transitions. [2020-10-06 00:01:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-06 00:01:51,416 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-06 00:01:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:51,417 INFO L225 Difference]: With dead ends: 99 [2020-10-06 00:01:51,417 INFO L226 Difference]: Without dead ends: 93 [2020-10-06 00:01:51,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=367, Invalid=1039, Unknown=0, NotChecked=0, Total=1406 [2020-10-06 00:01:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-06 00:01:51,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2020-10-06 00:01:51,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-06 00:01:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2020-10-06 00:01:51,421 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 22 [2020-10-06 00:01:51,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:51,422 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2020-10-06 00:01:51,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-06 00:01:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2020-10-06 00:01:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-06 00:01:51,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:51,422 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:51,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:51,632 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:51,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:51,632 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 51 times [2020-10-06 00:01:51,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:51,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615051012] [2020-10-06 00:01:51,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:51,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615051012] [2020-10-06 00:01:51,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201299229] [2020-10-06 00:01:51,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:51,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-06 00:01:51,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:51,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-06 00:01:51,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:51,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:51,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-06 00:01:51,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2015191385] [2020-10-06 00:01:51,876 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:51,878 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:51,882 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-06 00:01:51,883 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:51,892 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:51,893 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:51,919 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15080#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:01:51,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-06 00:01:51,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:51,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-06 00:01:51,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-06 00:01:51,920 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand 19 states. [2020-10-06 00:01:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:52,489 INFO L93 Difference]: Finished difference Result 97 states and 228 transitions. [2020-10-06 00:01:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-06 00:01:52,490 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-06 00:01:52,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:52,491 INFO L225 Difference]: With dead ends: 97 [2020-10-06 00:01:52,491 INFO L226 Difference]: Without dead ends: 91 [2020-10-06 00:01:52,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2020-10-06 00:01:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-06 00:01:52,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2020-10-06 00:01:52,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-06 00:01:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2020-10-06 00:01:52,494 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 22 [2020-10-06 00:01:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:52,495 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2020-10-06 00:01:52,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-06 00:01:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2020-10-06 00:01:52,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-06 00:01:52,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:52,496 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:52,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:52,705 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 52 times [2020-10-06 00:01:52,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:52,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043665671] [2020-10-06 00:01:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:52,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043665671] [2020-10-06 00:01:52,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272559554] [2020-10-06 00:01:52,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:52,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:01:52,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:52,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-06 00:01:52,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:52,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:52,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-06 00:01:52,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1109339160] [2020-10-06 00:01:52,946 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:52,948 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:52,953 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-06 00:01:52,953 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:52,962 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:52,963 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:52,986 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15439#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-06 00:01:52,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-06 00:01:52,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:52,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-06 00:01:52,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-06 00:01:52,987 INFO L87 Difference]: Start difference. First operand 69 states and 172 transitions. Second operand 19 states. [2020-10-06 00:01:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:53,621 INFO L93 Difference]: Finished difference Result 95 states and 226 transitions. [2020-10-06 00:01:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-06 00:01:53,622 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-06 00:01:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:53,623 INFO L225 Difference]: With dead ends: 95 [2020-10-06 00:01:53,623 INFO L226 Difference]: Without dead ends: 89 [2020-10-06 00:01:53,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2020-10-06 00:01:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-06 00:01:53,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2020-10-06 00:01:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-06 00:01:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 178 transitions. [2020-10-06 00:01:53,627 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 178 transitions. Word has length 22 [2020-10-06 00:01:53,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:53,627 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 178 transitions. [2020-10-06 00:01:53,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-06 00:01:53,627 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 178 transitions. [2020-10-06 00:01:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-06 00:01:53,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:53,628 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:53,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-06 00:01:53,828 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:53,829 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 53 times [2020-10-06 00:01:53,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:53,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403718040] [2020-10-06 00:01:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:53,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403718040] [2020-10-06 00:01:53,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445160762] [2020-10-06 00:01:53,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:54,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-06 00:01:54,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:54,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-06 00:01:54,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:54,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:54,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-06 00:01:54,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1020125123] [2020-10-06 00:01:54,057 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:54,059 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:54,062 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-06 00:01:54,063 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:54,065 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:54,066 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:54,096 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15804#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-06 00:01:54,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-06 00:01:54,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:54,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-06 00:01:54,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-06 00:01:54,097 INFO L87 Difference]: Start difference. First operand 71 states and 178 transitions. Second operand 19 states. [2020-10-06 00:01:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:54,813 INFO L93 Difference]: Finished difference Result 93 states and 224 transitions. [2020-10-06 00:01:54,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-06 00:01:54,814 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-06 00:01:54,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:54,815 INFO L225 Difference]: With dead ends: 93 [2020-10-06 00:01:54,815 INFO L226 Difference]: Without dead ends: 87 [2020-10-06 00:01:54,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1369, Unknown=0, NotChecked=0, Total=1892 [2020-10-06 00:01:54,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-06 00:01:54,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-10-06 00:01:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-06 00:01:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 184 transitions. [2020-10-06 00:01:54,818 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 184 transitions. Word has length 22 [2020-10-06 00:01:54,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:54,818 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 184 transitions. [2020-10-06 00:01:54,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-06 00:01:54,818 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 184 transitions. [2020-10-06 00:01:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-06 00:01:54,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:54,819 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:55,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:55,020 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:55,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:55,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 54 times [2020-10-06 00:01:55,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:55,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731915352] [2020-10-06 00:01:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:55,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731915352] [2020-10-06 00:01:55,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566059158] [2020-10-06 00:01:55,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:55,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-06 00:01:55,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:55,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-06 00:01:55,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:55,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:55,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-06 00:01:55,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1410542399] [2020-10-06 00:01:55,250 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:55,252 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:55,256 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-06 00:01:55,256 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:55,260 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:55,260 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:55,287 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16175#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-06 00:01:55,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-06 00:01:55,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:55,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-06 00:01:55,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-10-06 00:01:55,288 INFO L87 Difference]: Start difference. First operand 73 states and 184 transitions. Second operand 19 states. [2020-10-06 00:01:56,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:56,063 INFO L93 Difference]: Finished difference Result 93 states and 227 transitions. [2020-10-06 00:01:56,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-06 00:01:56,064 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-06 00:01:56,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:56,065 INFO L225 Difference]: With dead ends: 93 [2020-10-06 00:01:56,065 INFO L226 Difference]: Without dead ends: 87 [2020-10-06 00:01:56,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=607, Invalid=1463, Unknown=0, NotChecked=0, Total=2070 [2020-10-06 00:01:56,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-06 00:01:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2020-10-06 00:01:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-06 00:01:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2020-10-06 00:01:56,068 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 22 [2020-10-06 00:01:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:56,069 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2020-10-06 00:01:56,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-06 00:01:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2020-10-06 00:01:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-06 00:01:56,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:56,069 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:56,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-06 00:01:56,270 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:56,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:56,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 55 times [2020-10-06 00:01:56,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:56,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730499838] [2020-10-06 00:01:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:56,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730499838] [2020-10-06 00:01:56,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918418727] [2020-10-06 00:01:56,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:56,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-06 00:01:56,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:56,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:56,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-06 00:01:56,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1782081210] [2020-10-06 00:01:56,492 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:56,494 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:56,498 INFO L258 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-06 00:01:56,498 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:56,511 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:56,511 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:56,533 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16554#(and (<= ~i~0 26) (<= ~j~0 20))] [2020-10-06 00:01:56,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-06 00:01:56,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:56,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-06 00:01:56,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-06 00:01:56,535 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand 19 states. [2020-10-06 00:01:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:57,375 INFO L93 Difference]: Finished difference Result 93 states and 235 transitions. [2020-10-06 00:01:57,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-06 00:01:57,376 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-06 00:01:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:57,377 INFO L225 Difference]: With dead ends: 93 [2020-10-06 00:01:57,377 INFO L226 Difference]: Without dead ends: 81 [2020-10-06 00:01:57,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=1551, Unknown=0, NotChecked=0, Total=2256 [2020-10-06 00:01:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-06 00:01:57,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2020-10-06 00:01:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-06 00:01:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-06 00:01:57,380 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 22 [2020-10-06 00:01:57,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:57,380 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-06 00:01:57,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-06 00:01:57,380 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-06 00:01:57,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-06 00:01:57,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:57,381 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:57,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-06 00:01:57,585 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 56 times [2020-10-06 00:01:57,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:57,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831609161] [2020-10-06 00:01:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:57,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831609161] [2020-10-06 00:01:57,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484533340] [2020-10-06 00:01:57,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:57,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:01:57,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:57,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-06 00:01:57,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:57,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:57,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-06 00:01:57,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1669130729] [2020-10-06 00:01:57,866 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:57,870 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:57,880 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 43 transitions. [2020-10-06 00:01:57,880 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:57,884 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:57,885 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:57,933 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:57,934 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:57,962 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:57,963 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:57,973 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:57,974 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:57,985 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16907#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-06 00:01:57,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-06 00:01:57,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:57,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-06 00:01:57,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-06 00:01:57,987 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 20 states. [2020-10-06 00:01:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:58,581 INFO L93 Difference]: Finished difference Result 90 states and 210 transitions. [2020-10-06 00:01:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-06 00:01:58,582 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-06 00:01:58,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:58,583 INFO L225 Difference]: With dead ends: 90 [2020-10-06 00:01:58,583 INFO L226 Difference]: Without dead ends: 84 [2020-10-06 00:01:58,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=947, Unknown=0, NotChecked=0, Total=1332 [2020-10-06 00:01:58,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-06 00:01:58,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-06 00:01:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-06 00:01:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-06 00:01:58,586 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 23 [2020-10-06 00:01:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:58,587 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-06 00:01:58,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-06 00:01:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-06 00:01:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-06 00:01:58,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:58,588 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:01:58,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:58,789 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:01:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:01:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 57 times [2020-10-06 00:01:58,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:01:58,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762935616] [2020-10-06 00:01:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:01:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:01:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:59,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762935616] [2020-10-06 00:01:59,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830595068] [2020-10-06 00:01:59,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:01:59,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-06 00:01:59,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:01:59,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-06 00:01:59,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:01:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:01:59,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:01:59,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-06 00:01:59,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1056130723] [2020-10-06 00:01:59,205 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:01:59,210 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:01:59,218 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-06 00:01:59,218 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:01:59,232 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:01:59,233 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:01:59,266 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17249#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-06 00:01:59,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-06 00:01:59,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:01:59,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-06 00:01:59,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-10-06 00:01:59,268 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 20 states. [2020-10-06 00:01:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:01:59,821 INFO L93 Difference]: Finished difference Result 122 states and 276 transitions. [2020-10-06 00:01:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-06 00:01:59,822 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-06 00:01:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:01:59,822 INFO L225 Difference]: With dead ends: 122 [2020-10-06 00:01:59,823 INFO L226 Difference]: Without dead ends: 116 [2020-10-06 00:01:59,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-10-06 00:01:59,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-06 00:01:59,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 68. [2020-10-06 00:01:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-06 00:01:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 168 transitions. [2020-10-06 00:01:59,826 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 168 transitions. Word has length 23 [2020-10-06 00:01:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:01:59,827 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 168 transitions. [2020-10-06 00:01:59,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-06 00:01:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 168 transitions. [2020-10-06 00:01:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-06 00:01:59,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:01:59,828 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:00,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-06 00:02:00,039 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:00,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:00,039 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 58 times [2020-10-06 00:02:00,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:00,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527003256] [2020-10-06 00:02:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:00,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527003256] [2020-10-06 00:02:00,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88610845] [2020-10-06 00:02:00,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:00,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:02:00,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:00,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-06 00:02:00,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:00,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:00,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-06 00:02:00,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1243744452] [2020-10-06 00:02:00,306 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:00,307 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:00,311 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-06 00:02:00,311 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:00,318 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:00,318 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:00,341 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17635#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:02:00,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-06 00:02:00,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:00,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-06 00:02:00,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-06 00:02:00,342 INFO L87 Difference]: Start difference. First operand 68 states and 168 transitions. Second operand 20 states. [2020-10-06 00:02:00,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:00,943 INFO L93 Difference]: Finished difference Result 119 states and 272 transitions. [2020-10-06 00:02:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-06 00:02:00,943 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-06 00:02:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:00,944 INFO L225 Difference]: With dead ends: 119 [2020-10-06 00:02:00,945 INFO L226 Difference]: Without dead ends: 113 [2020-10-06 00:02:00,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=473, Invalid=1333, Unknown=0, NotChecked=0, Total=1806 [2020-10-06 00:02:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-06 00:02:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 70. [2020-10-06 00:02:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-06 00:02:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 174 transitions. [2020-10-06 00:02:00,947 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 174 transitions. Word has length 23 [2020-10-06 00:02:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:00,947 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 174 transitions. [2020-10-06 00:02:00,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-06 00:02:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 174 transitions. [2020-10-06 00:02:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-06 00:02:00,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:00,948 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:01,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:01,152 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:01,152 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 59 times [2020-10-06 00:02:01,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:01,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063730317] [2020-10-06 00:02:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:01,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063730317] [2020-10-06 00:02:01,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122310448] [2020-10-06 00:02:01,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:01,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-06 00:02:01,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-06 00:02:01,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:01,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:01,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-06 00:02:01,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1082982886] [2020-10-06 00:02:01,424 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:01,428 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:01,435 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-06 00:02:01,436 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:01,447 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:01,447 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:01,477 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18026#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:02:01,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-06 00:02:01,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:01,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-06 00:02:01,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-06 00:02:01,478 INFO L87 Difference]: Start difference. First operand 70 states and 174 transitions. Second operand 20 states. [2020-10-06 00:02:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:02,124 INFO L93 Difference]: Finished difference Result 117 states and 270 transitions. [2020-10-06 00:02:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-06 00:02:02,125 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-06 00:02:02,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:02,126 INFO L225 Difference]: With dead ends: 117 [2020-10-06 00:02:02,126 INFO L226 Difference]: Without dead ends: 111 [2020-10-06 00:02:02,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=522, Invalid=1458, Unknown=0, NotChecked=0, Total=1980 [2020-10-06 00:02:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-06 00:02:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2020-10-06 00:02:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-06 00:02:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 180 transitions. [2020-10-06 00:02:02,129 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 180 transitions. Word has length 23 [2020-10-06 00:02:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:02,129 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 180 transitions. [2020-10-06 00:02:02,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-06 00:02:02,129 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 180 transitions. [2020-10-06 00:02:02,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-06 00:02:02,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:02,130 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:02,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-06 00:02:02,332 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:02,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 60 times [2020-10-06 00:02:02,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:02,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762320393] [2020-10-06 00:02:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:02,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762320393] [2020-10-06 00:02:02,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571601590] [2020-10-06 00:02:02,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:02,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-06 00:02:02,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:02,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-06 00:02:02,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:02,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:02,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-06 00:02:02,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [464381417] [2020-10-06 00:02:02,608 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:02,610 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:02,613 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-06 00:02:02,613 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:02,614 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:02,614 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:02,646 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18423#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:02:02,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-06 00:02:02,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:02,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-06 00:02:02,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-10-06 00:02:02,647 INFO L87 Difference]: Start difference. First operand 72 states and 180 transitions. Second operand 20 states. [2020-10-06 00:02:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:03,396 INFO L93 Difference]: Finished difference Result 115 states and 268 transitions. [2020-10-06 00:02:03,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-06 00:02:03,401 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-06 00:02:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:03,401 INFO L225 Difference]: With dead ends: 115 [2020-10-06 00:02:03,401 INFO L226 Difference]: Without dead ends: 109 [2020-10-06 00:02:03,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=587, Invalid=1575, Unknown=0, NotChecked=0, Total=2162 [2020-10-06 00:02:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-06 00:02:03,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2020-10-06 00:02:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-06 00:02:03,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 186 transitions. [2020-10-06 00:02:03,404 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 186 transitions. Word has length 23 [2020-10-06 00:02:03,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:03,404 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 186 transitions. [2020-10-06 00:02:03,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-06 00:02:03,404 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 186 transitions. [2020-10-06 00:02:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-06 00:02:03,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:03,404 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:03,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:03,605 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:03,606 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 61 times [2020-10-06 00:02:03,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:03,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855352412] [2020-10-06 00:02:03,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:03,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855352412] [2020-10-06 00:02:03,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696998162] [2020-10-06 00:02:03,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:03,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-06 00:02:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:03,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:03,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-06 00:02:03,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2001283522] [2020-10-06 00:02:03,836 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:03,838 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:03,843 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-06 00:02:03,843 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:03,851 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:03,851 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:03,872 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18826#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-06 00:02:03,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-06 00:02:03,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:03,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-06 00:02:03,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-06 00:02:03,873 INFO L87 Difference]: Start difference. First operand 74 states and 186 transitions. Second operand 20 states. [2020-10-06 00:02:04,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:04,681 INFO L93 Difference]: Finished difference Result 113 states and 266 transitions. [2020-10-06 00:02:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-06 00:02:04,681 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-06 00:02:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:04,683 INFO L225 Difference]: With dead ends: 113 [2020-10-06 00:02:04,683 INFO L226 Difference]: Without dead ends: 107 [2020-10-06 00:02:04,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=1684, Unknown=0, NotChecked=0, Total=2352 [2020-10-06 00:02:04,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-06 00:02:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 76. [2020-10-06 00:02:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-06 00:02:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 192 transitions. [2020-10-06 00:02:04,685 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 192 transitions. Word has length 23 [2020-10-06 00:02:04,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:04,685 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 192 transitions. [2020-10-06 00:02:04,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-06 00:02:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 192 transitions. [2020-10-06 00:02:04,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-06 00:02:04,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:04,686 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:04,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-06 00:02:04,887 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:04,887 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 62 times [2020-10-06 00:02:04,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:04,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925071460] [2020-10-06 00:02:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:05,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925071460] [2020-10-06 00:02:05,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941281050] [2020-10-06 00:02:05,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:05,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:02:05,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:05,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-06 00:02:05,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:05,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:05,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-06 00:02:05,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [298674940] [2020-10-06 00:02:05,137 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:05,139 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:05,143 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-06 00:02:05,143 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:05,156 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:05,157 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:05,179 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19235#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-06 00:02:05,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-06 00:02:05,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:05,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-06 00:02:05,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-06 00:02:05,181 INFO L87 Difference]: Start difference. First operand 76 states and 192 transitions. Second operand 20 states. [2020-10-06 00:02:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:06,062 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-06 00:02:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-06 00:02:06,063 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-06 00:02:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:06,064 INFO L225 Difference]: With dead ends: 113 [2020-10-06 00:02:06,064 INFO L226 Difference]: Without dead ends: 107 [2020-10-06 00:02:06,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=765, Invalid=1785, Unknown=0, NotChecked=0, Total=2550 [2020-10-06 00:02:06,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-06 00:02:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2020-10-06 00:02:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-06 00:02:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 200 transitions. [2020-10-06 00:02:06,067 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 200 transitions. Word has length 23 [2020-10-06 00:02:06,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:06,068 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 200 transitions. [2020-10-06 00:02:06,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-06 00:02:06,068 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 200 transitions. [2020-10-06 00:02:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-06 00:02:06,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:06,069 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:06,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:06,273 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:06,273 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 63 times [2020-10-06 00:02:06,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:06,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987877301] [2020-10-06 00:02:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:06,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987877301] [2020-10-06 00:02:06,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557893669] [2020-10-06 00:02:06,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:06,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-06 00:02:06,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:06,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-06 00:02:06,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:06,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:06,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-06 00:02:06,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [226154674] [2020-10-06 00:02:06,522 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:06,524 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:06,528 INFO L258 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-06 00:02:06,528 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:06,535 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:06,536 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:06,558 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19652#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-06 00:02:06,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-06 00:02:06,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:06,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-06 00:02:06,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-10-06 00:02:06,560 INFO L87 Difference]: Start difference. First operand 78 states and 200 transitions. Second operand 20 states. [2020-10-06 00:02:07,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:07,509 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-06 00:02:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-06 00:02:07,510 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-06 00:02:07,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:07,511 INFO L225 Difference]: With dead ends: 114 [2020-10-06 00:02:07,511 INFO L226 Difference]: Without dead ends: 102 [2020-10-06 00:02:07,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=876, Invalid=1880, Unknown=0, NotChecked=0, Total=2756 [2020-10-06 00:02:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-06 00:02:07,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2020-10-06 00:02:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-06 00:02:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-06 00:02:07,515 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 23 [2020-10-06 00:02:07,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:07,515 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-06 00:02:07,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-06 00:02:07,515 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-06 00:02:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-06 00:02:07,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:07,516 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:07,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-06 00:02:07,725 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:07,725 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 64 times [2020-10-06 00:02:07,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:07,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662684503] [2020-10-06 00:02:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:07,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662684503] [2020-10-06 00:02:07,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781539631] [2020-10-06 00:02:07,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:08,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:02:08,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:08,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-06 00:02:08,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:08,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:08,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-06 00:02:08,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1634413471] [2020-10-06 00:02:08,026 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:08,029 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:08,035 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 40 transitions. [2020-10-06 00:02:08,035 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:08,058 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:08,058 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:08,088 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20046#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:02:08,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-06 00:02:08,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:08,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-06 00:02:08,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-10-06 00:02:08,089 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 21 states. [2020-10-06 00:02:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:08,570 INFO L93 Difference]: Finished difference Result 110 states and 252 transitions. [2020-10-06 00:02:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-06 00:02:08,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-06 00:02:08,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:08,571 INFO L225 Difference]: With dead ends: 110 [2020-10-06 00:02:08,572 INFO L226 Difference]: Without dead ends: 104 [2020-10-06 00:02:08,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2020-10-06 00:02:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-06 00:02:08,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 69. [2020-10-06 00:02:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-06 00:02:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 170 transitions. [2020-10-06 00:02:08,574 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 170 transitions. Word has length 24 [2020-10-06 00:02:08,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:08,574 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 170 transitions. [2020-10-06 00:02:08,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-06 00:02:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 170 transitions. [2020-10-06 00:02:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-06 00:02:08,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:08,575 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:08,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:08,779 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:08,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:08,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 65 times [2020-10-06 00:02:08,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:08,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184378610] [2020-10-06 00:02:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:08,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184378610] [2020-10-06 00:02:08,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352957124] [2020-10-06 00:02:08,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:09,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-06 00:02:09,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-06 00:02:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:09,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:09,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-06 00:02:09,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [688637158] [2020-10-06 00:02:09,068 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:09,079 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:09,085 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-06 00:02:09,085 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:09,086 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:09,086 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:09,117 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20422#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:02:09,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-06 00:02:09,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:09,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-06 00:02:09,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-06 00:02:09,118 INFO L87 Difference]: Start difference. First operand 69 states and 170 transitions. Second operand 21 states. [2020-10-06 00:02:09,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:09,705 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-10-06 00:02:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-06 00:02:09,705 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-06 00:02:09,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:09,707 INFO L225 Difference]: With dead ends: 107 [2020-10-06 00:02:09,707 INFO L226 Difference]: Without dead ends: 101 [2020-10-06 00:02:09,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=450, Invalid=1272, Unknown=0, NotChecked=0, Total=1722 [2020-10-06 00:02:09,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-06 00:02:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2020-10-06 00:02:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-06 00:02:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 176 transitions. [2020-10-06 00:02:09,709 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 176 transitions. Word has length 24 [2020-10-06 00:02:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:09,709 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 176 transitions. [2020-10-06 00:02:09,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-06 00:02:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 176 transitions. [2020-10-06 00:02:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-06 00:02:09,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:09,710 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:09,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-06 00:02:09,910 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:09,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:09,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 66 times [2020-10-06 00:02:09,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:09,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933316824] [2020-10-06 00:02:09,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:10,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933316824] [2020-10-06 00:02:10,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342575338] [2020-10-06 00:02:10,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:10,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-06 00:02:10,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:10,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-06 00:02:10,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:10,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:10,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-06 00:02:10,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [270758612] [2020-10-06 00:02:10,202 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:10,204 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:10,208 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-06 00:02:10,209 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:10,214 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:10,214 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:10,244 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20803#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:02:10,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-06 00:02:10,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:10,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-06 00:02:10,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-06 00:02:10,245 INFO L87 Difference]: Start difference. First operand 71 states and 176 transitions. Second operand 21 states. [2020-10-06 00:02:10,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:10,900 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-06 00:02:10,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-06 00:02:10,901 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-06 00:02:10,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:10,902 INFO L225 Difference]: With dead ends: 105 [2020-10-06 00:02:10,902 INFO L226 Difference]: Without dead ends: 99 [2020-10-06 00:02:10,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2020-10-06 00:02:10,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-06 00:02:10,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 73. [2020-10-06 00:02:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-06 00:02:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2020-10-06 00:02:10,906 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 24 [2020-10-06 00:02:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:10,906 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2020-10-06 00:02:10,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-06 00:02:10,906 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2020-10-06 00:02:10,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-06 00:02:10,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:10,907 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:11,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-06 00:02:11,108 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:11,108 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 67 times [2020-10-06 00:02:11,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:11,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500145096] [2020-10-06 00:02:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:11,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500145096] [2020-10-06 00:02:11,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861254484] [2020-10-06 00:02:11,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:11,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-06 00:02:11,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:11,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:11,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-06 00:02:11,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [912284573] [2020-10-06 00:02:11,398 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:11,400 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:11,406 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-06 00:02:11,406 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:11,419 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:11,419 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:11,442 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21190#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-06 00:02:11,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-06 00:02:11,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:11,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-06 00:02:11,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-10-06 00:02:11,443 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand 21 states. [2020-10-06 00:02:12,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:12,157 INFO L93 Difference]: Finished difference Result 103 states and 244 transitions. [2020-10-06 00:02:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-06 00:02:12,157 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-06 00:02:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:12,158 INFO L225 Difference]: With dead ends: 103 [2020-10-06 00:02:12,159 INFO L226 Difference]: Without dead ends: 97 [2020-10-06 00:02:12,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=534, Invalid=1536, Unknown=0, NotChecked=0, Total=2070 [2020-10-06 00:02:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-06 00:02:12,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2020-10-06 00:02:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-06 00:02:12,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 188 transitions. [2020-10-06 00:02:12,161 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 188 transitions. Word has length 24 [2020-10-06 00:02:12,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:12,161 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 188 transitions. [2020-10-06 00:02:12,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-06 00:02:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 188 transitions. [2020-10-06 00:02:12,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-06 00:02:12,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:12,163 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:12,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-06 00:02:12,372 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:12,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:12,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 68 times [2020-10-06 00:02:12,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:12,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655438872] [2020-10-06 00:02:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:12,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655438872] [2020-10-06 00:02:12,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3096102] [2020-10-06 00:02:12,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:12,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:02:12,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:12,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-06 00:02:12,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:12,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:12,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-06 00:02:12,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [931725845] [2020-10-06 00:02:12,646 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:12,648 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:12,652 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-06 00:02:12,652 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:12,660 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:12,661 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:12,684 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21583#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-06 00:02:12,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-06 00:02:12,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:12,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-06 00:02:12,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-10-06 00:02:12,686 INFO L87 Difference]: Start difference. First operand 75 states and 188 transitions. Second operand 21 states. [2020-10-06 00:02:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:13,506 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2020-10-06 00:02:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-06 00:02:13,507 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-06 00:02:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:13,508 INFO L225 Difference]: With dead ends: 101 [2020-10-06 00:02:13,508 INFO L226 Difference]: Without dead ends: 95 [2020-10-06 00:02:13,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2020-10-06 00:02:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-06 00:02:13,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2020-10-06 00:02:13,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-06 00:02:13,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 194 transitions. [2020-10-06 00:02:13,511 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 194 transitions. Word has length 24 [2020-10-06 00:02:13,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:13,512 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 194 transitions. [2020-10-06 00:02:13,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-06 00:02:13,512 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 194 transitions. [2020-10-06 00:02:13,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-06 00:02:13,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:13,512 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:13,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:13,718 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:13,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 69 times [2020-10-06 00:02:13,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:13,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437690029] [2020-10-06 00:02:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:13,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437690029] [2020-10-06 00:02:13,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449884989] [2020-10-06 00:02:13,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:13,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-06 00:02:13,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:13,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-06 00:02:13,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:13,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:13,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-06 00:02:13,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1080280710] [2020-10-06 00:02:13,988 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:13,990 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:13,994 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-06 00:02:13,994 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:13,997 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:13,997 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:14,026 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21982#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-06 00:02:14,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-06 00:02:14,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:14,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-06 00:02:14,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-06 00:02:14,027 INFO L87 Difference]: Start difference. First operand 77 states and 194 transitions. Second operand 21 states. [2020-10-06 00:02:14,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:14,916 INFO L93 Difference]: Finished difference Result 99 states and 240 transitions. [2020-10-06 00:02:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-06 00:02:14,916 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-06 00:02:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:14,917 INFO L225 Difference]: With dead ends: 99 [2020-10-06 00:02:14,917 INFO L226 Difference]: Without dead ends: 93 [2020-10-06 00:02:14,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=682, Invalid=1768, Unknown=0, NotChecked=0, Total=2450 [2020-10-06 00:02:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-06 00:02:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2020-10-06 00:02:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-06 00:02:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 200 transitions. [2020-10-06 00:02:14,921 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 200 transitions. Word has length 24 [2020-10-06 00:02:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:14,921 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 200 transitions. [2020-10-06 00:02:14,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-06 00:02:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 200 transitions. [2020-10-06 00:02:14,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-06 00:02:14,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:14,922 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:15,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:15,130 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:15,130 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 70 times [2020-10-06 00:02:15,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:15,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690053870] [2020-10-06 00:02:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:15,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690053870] [2020-10-06 00:02:15,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636759377] [2020-10-06 00:02:15,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:15,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:02:15,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:15,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-06 00:02:15,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:15,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:15,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-06 00:02:15,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [604190388] [2020-10-06 00:02:15,391 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:15,393 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:15,397 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-06 00:02:15,397 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:15,400 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:15,400 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:15,437 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22387#(and (<= ~i~0 26) (<= ~j~0 20))] [2020-10-06 00:02:15,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-06 00:02:15,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:15,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-06 00:02:15,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-06 00:02:15,438 INFO L87 Difference]: Start difference. First operand 79 states and 200 transitions. Second operand 21 states. [2020-10-06 00:02:16,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:16,401 INFO L93 Difference]: Finished difference Result 99 states and 243 transitions. [2020-10-06 00:02:16,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-06 00:02:16,401 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-06 00:02:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:16,403 INFO L225 Difference]: With dead ends: 99 [2020-10-06 00:02:16,403 INFO L226 Difference]: Without dead ends: 93 [2020-10-06 00:02:16,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=1872, Unknown=0, NotChecked=0, Total=2652 [2020-10-06 00:02:16,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-06 00:02:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2020-10-06 00:02:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-06 00:02:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 208 transitions. [2020-10-06 00:02:16,407 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 208 transitions. Word has length 24 [2020-10-06 00:02:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:16,407 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 208 transitions. [2020-10-06 00:02:16,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-06 00:02:16,407 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 208 transitions. [2020-10-06 00:02:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-06 00:02:16,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:16,408 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:16,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:16,618 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:16,619 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 71 times [2020-10-06 00:02:16,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:16,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279844828] [2020-10-06 00:02:16,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:16,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279844828] [2020-10-06 00:02:16,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613993286] [2020-10-06 00:02:16,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:16,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-06 00:02:16,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:16,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-06 00:02:16,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:16,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:16,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-06 00:02:16,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [169714418] [2020-10-06 00:02:16,890 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:16,893 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:16,897 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-06 00:02:16,897 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:16,898 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:16,898 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:16,930 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22800#(and (<= ~i~0 26) (<= ~j~0 22))] [2020-10-06 00:02:16,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-06 00:02:16,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:16,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-06 00:02:16,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-10-06 00:02:16,931 INFO L87 Difference]: Start difference. First operand 81 states and 208 transitions. Second operand 21 states. [2020-10-06 00:02:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:17,957 INFO L93 Difference]: Finished difference Result 99 states and 251 transitions. [2020-10-06 00:02:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-06 00:02:17,959 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-06 00:02:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:17,960 INFO L225 Difference]: With dead ends: 99 [2020-10-06 00:02:17,960 INFO L226 Difference]: Without dead ends: 87 [2020-10-06 00:02:17,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=892, Invalid=1970, Unknown=0, NotChecked=0, Total=2862 [2020-10-06 00:02:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-06 00:02:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2020-10-06 00:02:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-06 00:02:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-06 00:02:17,962 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 24 [2020-10-06 00:02:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:17,962 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-06 00:02:17,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-06 00:02:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-06 00:02:17,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-06 00:02:17,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:17,963 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:18,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-06 00:02:18,163 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:18,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:18,164 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 72 times [2020-10-06 00:02:18,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:18,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102198806] [2020-10-06 00:02:18,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:18,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102198806] [2020-10-06 00:02:18,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137240632] [2020-10-06 00:02:18,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:18,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-06 00:02:18,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:18,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-06 00:02:18,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:18,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:18,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-06 00:02:18,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1268930389] [2020-10-06 00:02:18,502 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:18,504 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:18,509 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 45 transitions. [2020-10-06 00:02:18,509 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:18,513 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:18,513 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:18,544 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:18,544 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:18,566 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:18,566 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:18,573 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:18,573 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:18,581 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23183#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-06 00:02:18,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-06 00:02:18,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:18,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-06 00:02:18,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-06 00:02:18,582 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 22 states. [2020-10-06 00:02:19,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:19,112 INFO L93 Difference]: Finished difference Result 96 states and 224 transitions. [2020-10-06 00:02:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-06 00:02:19,112 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-06 00:02:19,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:19,113 INFO L225 Difference]: With dead ends: 96 [2020-10-06 00:02:19,113 INFO L226 Difference]: Without dead ends: 90 [2020-10-06 00:02:19,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=476, Invalid=1164, Unknown=0, NotChecked=0, Total=1640 [2020-10-06 00:02:19,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-06 00:02:19,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-06 00:02:19,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-06 00:02:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-10-06 00:02:19,117 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 25 [2020-10-06 00:02:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:19,117 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-10-06 00:02:19,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-06 00:02:19,117 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-10-06 00:02:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-06 00:02:19,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:19,118 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:19,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:19,328 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:19,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:19,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 73 times [2020-10-06 00:02:19,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:19,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092013648] [2020-10-06 00:02:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:19,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092013648] [2020-10-06 00:02:19,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391113786] [2020-10-06 00:02:19,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:19,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-06 00:02:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:19,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:19,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-06 00:02:19,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [826570394] [2020-10-06 00:02:19,661 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:19,663 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:19,668 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-06 00:02:19,668 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:19,682 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:19,683 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:19,709 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23551#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-06 00:02:19,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-06 00:02:19,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:19,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-06 00:02:19,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-06 00:02:19,710 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 22 states. [2020-10-06 00:02:20,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:20,353 INFO L93 Difference]: Finished difference Result 132 states and 298 transitions. [2020-10-06 00:02:20,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-06 00:02:20,353 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-06 00:02:20,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:20,355 INFO L225 Difference]: With dead ends: 132 [2020-10-06 00:02:20,355 INFO L226 Difference]: Without dead ends: 126 [2020-10-06 00:02:20,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=533, Invalid=1447, Unknown=0, NotChecked=0, Total=1980 [2020-10-06 00:02:20,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-06 00:02:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2020-10-06 00:02:20,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-06 00:02:20,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 178 transitions. [2020-10-06 00:02:20,358 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 178 transitions. Word has length 25 [2020-10-06 00:02:20,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:20,359 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 178 transitions. [2020-10-06 00:02:20,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-06 00:02:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 178 transitions. [2020-10-06 00:02:20,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-06 00:02:20,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:20,359 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:20,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:20,560 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:20,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 74 times [2020-10-06 00:02:20,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:20,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239813749] [2020-10-06 00:02:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:20,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239813749] [2020-10-06 00:02:20,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834019472] [2020-10-06 00:02:20,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:20,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:02:20,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:20,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-06 00:02:20,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:20,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:20,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-06 00:02:20,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2059641384] [2020-10-06 00:02:20,870 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:20,872 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:20,877 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-06 00:02:20,877 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:20,884 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:20,885 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:20,912 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23967#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:02:20,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-06 00:02:20,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:20,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-06 00:02:20,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-06 00:02:20,913 INFO L87 Difference]: Start difference. First operand 72 states and 178 transitions. Second operand 22 states. [2020-10-06 00:02:21,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:21,635 INFO L93 Difference]: Finished difference Result 129 states and 294 transitions. [2020-10-06 00:02:21,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-06 00:02:21,635 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-06 00:02:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:21,637 INFO L225 Difference]: With dead ends: 129 [2020-10-06 00:02:21,637 INFO L226 Difference]: Without dead ends: 123 [2020-10-06 00:02:21,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=564, Invalid=1598, Unknown=0, NotChecked=0, Total=2162 [2020-10-06 00:02:21,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-06 00:02:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2020-10-06 00:02:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-06 00:02:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2020-10-06 00:02:21,640 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 25 [2020-10-06 00:02:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:21,640 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2020-10-06 00:02:21,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-06 00:02:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2020-10-06 00:02:21,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-06 00:02:21,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:21,641 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:21,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:21,842 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:21,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:21,842 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 75 times [2020-10-06 00:02:21,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:21,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668679572] [2020-10-06 00:02:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:22,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668679572] [2020-10-06 00:02:22,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64056701] [2020-10-06 00:02:22,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:22,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-06 00:02:22,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:22,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-06 00:02:22,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:22,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:22,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-06 00:02:22,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1731118707] [2020-10-06 00:02:22,170 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:22,172 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:22,176 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-06 00:02:22,176 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:22,184 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:22,185 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:22,209 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24388#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:02:22,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-06 00:02:22,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:22,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-06 00:02:22,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-10-06 00:02:22,210 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand 22 states. [2020-10-06 00:02:22,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:22,998 INFO L93 Difference]: Finished difference Result 127 states and 292 transitions. [2020-10-06 00:02:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-06 00:02:22,999 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-06 00:02:22,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:23,000 INFO L225 Difference]: With dead ends: 127 [2020-10-06 00:02:23,000 INFO L226 Difference]: Without dead ends: 121 [2020-10-06 00:02:23,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=611, Invalid=1741, Unknown=0, NotChecked=0, Total=2352 [2020-10-06 00:02:23,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-06 00:02:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2020-10-06 00:02:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-06 00:02:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 190 transitions. [2020-10-06 00:02:23,004 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 190 transitions. Word has length 25 [2020-10-06 00:02:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:23,004 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 190 transitions. [2020-10-06 00:02:23,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-06 00:02:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 190 transitions. [2020-10-06 00:02:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-06 00:02:23,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:23,005 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:23,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-06 00:02:23,214 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:23,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 76 times [2020-10-06 00:02:23,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:23,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344020873] [2020-10-06 00:02:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:23,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344020873] [2020-10-06 00:02:23,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142731640] [2020-10-06 00:02:23,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:23,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:02:23,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:23,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-06 00:02:23,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:23,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:23,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-06 00:02:23,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [881822703] [2020-10-06 00:02:23,519 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:23,521 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:23,526 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-06 00:02:23,526 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:23,527 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:23,527 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:23,561 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24815#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:02:23,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-06 00:02:23,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:23,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-06 00:02:23,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-06 00:02:23,562 INFO L87 Difference]: Start difference. First operand 76 states and 190 transitions. Second operand 22 states. [2020-10-06 00:02:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:24,424 INFO L93 Difference]: Finished difference Result 125 states and 290 transitions. [2020-10-06 00:02:24,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-06 00:02:24,424 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-06 00:02:24,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:24,425 INFO L225 Difference]: With dead ends: 125 [2020-10-06 00:02:24,426 INFO L226 Difference]: Without dead ends: 119 [2020-10-06 00:02:24,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2020-10-06 00:02:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-06 00:02:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2020-10-06 00:02:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-06 00:02:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 196 transitions. [2020-10-06 00:02:24,429 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 196 transitions. Word has length 25 [2020-10-06 00:02:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:24,429 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 196 transitions. [2020-10-06 00:02:24,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-06 00:02:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 196 transitions. [2020-10-06 00:02:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-06 00:02:24,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:24,430 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:24,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:24,640 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:24,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:24,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 77 times [2020-10-06 00:02:24,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:24,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498902050] [2020-10-06 00:02:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:24,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498902050] [2020-10-06 00:02:24,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478950213] [2020-10-06 00:02:24,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:24,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-06 00:02:24,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:24,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-06 00:02:24,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:24,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:24,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-06 00:02:24,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2007831932] [2020-10-06 00:02:24,937 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:24,940 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:24,946 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-06 00:02:24,946 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:24,959 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:24,959 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:24,983 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25248#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-06 00:02:24,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-06 00:02:24,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:24,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-06 00:02:24,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-10-06 00:02:24,985 INFO L87 Difference]: Start difference. First operand 78 states and 196 transitions. Second operand 22 states. [2020-10-06 00:02:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:25,902 INFO L93 Difference]: Finished difference Result 123 states and 288 transitions. [2020-10-06 00:02:25,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-06 00:02:25,903 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-06 00:02:25,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:25,904 INFO L225 Difference]: With dead ends: 123 [2020-10-06 00:02:25,904 INFO L226 Difference]: Without dead ends: 117 [2020-10-06 00:02:25,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=753, Invalid=2003, Unknown=0, NotChecked=0, Total=2756 [2020-10-06 00:02:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-06 00:02:25,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2020-10-06 00:02:25,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-06 00:02:25,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 202 transitions. [2020-10-06 00:02:25,907 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 202 transitions. Word has length 25 [2020-10-06 00:02:25,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:25,907 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 202 transitions. [2020-10-06 00:02:25,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-06 00:02:25,908 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 202 transitions. [2020-10-06 00:02:25,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-06 00:02:25,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:25,909 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:26,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:26,117 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:26,117 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 78 times [2020-10-06 00:02:26,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:26,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463254692] [2020-10-06 00:02:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:26,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463254692] [2020-10-06 00:02:26,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973429654] [2020-10-06 00:02:26,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:26,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-06 00:02:26,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:26,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-06 00:02:26,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:26,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:26,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-06 00:02:26,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [533164379] [2020-10-06 00:02:26,415 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:26,417 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:26,421 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-06 00:02:26,421 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:26,429 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:26,429 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:26,453 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25687#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-06 00:02:26,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-06 00:02:26,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:26,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-06 00:02:26,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-06 00:02:26,454 INFO L87 Difference]: Start difference. First operand 80 states and 202 transitions. Second operand 22 states. [2020-10-06 00:02:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:27,445 INFO L93 Difference]: Finished difference Result 121 states and 286 transitions. [2020-10-06 00:02:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-06 00:02:27,446 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-06 00:02:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:27,447 INFO L225 Difference]: With dead ends: 121 [2020-10-06 00:02:27,447 INFO L226 Difference]: Without dead ends: 115 [2020-10-06 00:02:27,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=848, Invalid=2122, Unknown=0, NotChecked=0, Total=2970 [2020-10-06 00:02:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-06 00:02:27,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2020-10-06 00:02:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-06 00:02:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 208 transitions. [2020-10-06 00:02:27,450 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 208 transitions. Word has length 25 [2020-10-06 00:02:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:27,451 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 208 transitions. [2020-10-06 00:02:27,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-06 00:02:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 208 transitions. [2020-10-06 00:02:27,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-06 00:02:27,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:27,451 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:27,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-06 00:02:27,652 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:27,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 79 times [2020-10-06 00:02:27,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:27,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009631620] [2020-10-06 00:02:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:27,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009631620] [2020-10-06 00:02:27,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841759779] [2020-10-06 00:02:27,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:27,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-06 00:02:27,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:27,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:27,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-06 00:02:27,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1858074328] [2020-10-06 00:02:27,934 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:27,935 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:27,940 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-06 00:02:27,940 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:27,947 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:27,947 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:27,972 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26132#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-06 00:02:27,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-06 00:02:27,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:27,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-06 00:02:27,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-10-06 00:02:27,974 INFO L87 Difference]: Start difference. First operand 82 states and 208 transitions. Second operand 22 states. [2020-10-06 00:02:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:29,053 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-10-06 00:02:29,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-06 00:02:29,054 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-06 00:02:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:29,055 INFO L225 Difference]: With dead ends: 121 [2020-10-06 00:02:29,055 INFO L226 Difference]: Without dead ends: 115 [2020-10-06 00:02:29,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=959, Invalid=2233, Unknown=0, NotChecked=0, Total=3192 [2020-10-06 00:02:29,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-06 00:02:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2020-10-06 00:02:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-06 00:02:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 216 transitions. [2020-10-06 00:02:29,058 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 216 transitions. Word has length 25 [2020-10-06 00:02:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:29,058 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 216 transitions. [2020-10-06 00:02:29,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-06 00:02:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 216 transitions. [2020-10-06 00:02:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-06 00:02:29,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:29,058 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:29,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:29,259 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:29,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:29,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 80 times [2020-10-06 00:02:29,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:29,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124376643] [2020-10-06 00:02:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:29,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124376643] [2020-10-06 00:02:29,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412706838] [2020-10-06 00:02:29,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:29,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:02:29,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:29,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-06 00:02:29,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:29,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:29,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-06 00:02:29,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [13863201] [2020-10-06 00:02:29,532 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:29,534 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:29,543 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-06 00:02:29,543 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:29,555 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:29,556 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:29,580 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26585#(and (<= ~i~0 26) (<= ~j~0 20))] [2020-10-06 00:02:29,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-06 00:02:29,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:29,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-06 00:02:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-10-06 00:02:29,581 INFO L87 Difference]: Start difference. First operand 84 states and 216 transitions. Second operand 22 states. [2020-10-06 00:02:30,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:30,708 INFO L93 Difference]: Finished difference Result 122 states and 299 transitions. [2020-10-06 00:02:30,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-06 00:02:30,709 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-06 00:02:30,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:30,710 INFO L225 Difference]: With dead ends: 122 [2020-10-06 00:02:30,710 INFO L226 Difference]: Without dead ends: 110 [2020-10-06 00:02:30,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1084, Invalid=2338, Unknown=0, NotChecked=0, Total=3422 [2020-10-06 00:02:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-06 00:02:30,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2020-10-06 00:02:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-06 00:02:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-06 00:02:30,713 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 25 [2020-10-06 00:02:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:30,713 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-06 00:02:30,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-06 00:02:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-06 00:02:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-06 00:02:30,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:30,715 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:30,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:30,925 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:30,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:30,926 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 81 times [2020-10-06 00:02:30,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:30,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699117504] [2020-10-06 00:02:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:31,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699117504] [2020-10-06 00:02:31,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356492858] [2020-10-06 00:02:31,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:31,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-06 00:02:31,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:31,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-06 00:02:31,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:31,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:31,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-06 00:02:31,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1581552912] [2020-10-06 00:02:31,371 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:31,393 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:31,403 INFO L258 McrAutomatonBuilder]: Finished intersection with 35 states and 42 transitions. [2020-10-06 00:02:31,404 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:31,410 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:31,410 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:31,456 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27011#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:02:31,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-06 00:02:31,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:31,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-06 00:02:31,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-10-06 00:02:31,458 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 23 states. [2020-10-06 00:02:32,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:32,178 INFO L93 Difference]: Finished difference Result 118 states and 270 transitions. [2020-10-06 00:02:32,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-06 00:02:32,179 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-06 00:02:32,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:32,181 INFO L225 Difference]: With dead ends: 118 [2020-10-06 00:02:32,181 INFO L226 Difference]: Without dead ends: 112 [2020-10-06 00:02:32,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=527, Invalid=1365, Unknown=0, NotChecked=0, Total=1892 [2020-10-06 00:02:32,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-06 00:02:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2020-10-06 00:02:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-06 00:02:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 180 transitions. [2020-10-06 00:02:32,185 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 180 transitions. Word has length 26 [2020-10-06 00:02:32,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:32,185 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 180 transitions. [2020-10-06 00:02:32,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-06 00:02:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 180 transitions. [2020-10-06 00:02:32,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-06 00:02:32,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:32,187 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:32,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:32,398 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:32,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 82 times [2020-10-06 00:02:32,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:32,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784178832] [2020-10-06 00:02:32,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:32,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784178832] [2020-10-06 00:02:32,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110577120] [2020-10-06 00:02:32,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:32,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:02:32,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:32,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-06 00:02:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:32,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:32,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-06 00:02:32,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1931071958] [2020-10-06 00:02:32,788 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:32,791 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:32,798 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-06 00:02:32,798 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:32,802 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:32,803 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:32,833 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27415#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:02:32,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-06 00:02:32,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:32,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-06 00:02:32,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-10-06 00:02:32,834 INFO L87 Difference]: Start difference. First operand 73 states and 180 transitions. Second operand 23 states. [2020-10-06 00:02:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:33,493 INFO L93 Difference]: Finished difference Result 115 states and 266 transitions. [2020-10-06 00:02:33,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-06 00:02:33,493 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-06 00:02:33,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:33,495 INFO L225 Difference]: With dead ends: 115 [2020-10-06 00:02:33,495 INFO L226 Difference]: Without dead ends: 109 [2020-10-06 00:02:33,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2020-10-06 00:02:33,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-06 00:02:33,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2020-10-06 00:02:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-06 00:02:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 186 transitions. [2020-10-06 00:02:33,498 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 186 transitions. Word has length 26 [2020-10-06 00:02:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:33,498 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 186 transitions. [2020-10-06 00:02:33,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-06 00:02:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 186 transitions. [2020-10-06 00:02:33,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-06 00:02:33,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:33,499 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:33,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:33,700 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:33,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 83 times [2020-10-06 00:02:33,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:33,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909170845] [2020-10-06 00:02:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:33,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909170845] [2020-10-06 00:02:33,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718726287] [2020-10-06 00:02:33,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:34,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-06 00:02:34,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:34,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-06 00:02:34,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:34,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:34,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-06 00:02:34,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [151076997] [2020-10-06 00:02:34,043 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:34,054 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:34,059 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-06 00:02:34,059 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:34,062 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:34,063 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:34,096 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27824#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:02:34,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-06 00:02:34,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:34,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-06 00:02:34,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-06 00:02:34,097 INFO L87 Difference]: Start difference. First operand 75 states and 186 transitions. Second operand 23 states. [2020-10-06 00:02:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:34,856 INFO L93 Difference]: Finished difference Result 113 states and 264 transitions. [2020-10-06 00:02:34,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-06 00:02:34,857 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-06 00:02:34,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:34,858 INFO L225 Difference]: With dead ends: 113 [2020-10-06 00:02:34,858 INFO L226 Difference]: Without dead ends: 107 [2020-10-06 00:02:34,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2020-10-06 00:02:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-06 00:02:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2020-10-06 00:02:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-06 00:02:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 192 transitions. [2020-10-06 00:02:34,861 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 192 transitions. Word has length 26 [2020-10-06 00:02:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:34,861 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 192 transitions. [2020-10-06 00:02:34,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-06 00:02:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 192 transitions. [2020-10-06 00:02:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-06 00:02:34,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:34,862 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:35,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:35,073 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 84 times [2020-10-06 00:02:35,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:35,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600701569] [2020-10-06 00:02:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:35,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600701569] [2020-10-06 00:02:35,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956143349] [2020-10-06 00:02:35,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:35,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-06 00:02:35,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:35,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-06 00:02:35,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:35,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:35,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-06 00:02:35,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1104304619] [2020-10-06 00:02:35,407 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:35,409 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:35,414 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-06 00:02:35,415 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:35,418 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:35,418 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:35,450 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28239#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-06 00:02:35,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-06 00:02:35,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:35,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-06 00:02:35,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-10-06 00:02:35,452 INFO L87 Difference]: Start difference. First operand 77 states and 192 transitions. Second operand 23 states. [2020-10-06 00:02:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:36,306 INFO L93 Difference]: Finished difference Result 111 states and 262 transitions. [2020-10-06 00:02:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-06 00:02:36,307 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-06 00:02:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:36,308 INFO L225 Difference]: With dead ends: 111 [2020-10-06 00:02:36,308 INFO L226 Difference]: Without dead ends: 105 [2020-10-06 00:02:36,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1827, Unknown=0, NotChecked=0, Total=2450 [2020-10-06 00:02:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-06 00:02:36,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2020-10-06 00:02:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-06 00:02:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 198 transitions. [2020-10-06 00:02:36,312 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 198 transitions. Word has length 26 [2020-10-06 00:02:36,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:36,312 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 198 transitions. [2020-10-06 00:02:36,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-06 00:02:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 198 transitions. [2020-10-06 00:02:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-06 00:02:36,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:36,313 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:36,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:36,514 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:36,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:36,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 85 times [2020-10-06 00:02:36,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:36,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188324652] [2020-10-06 00:02:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:36,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188324652] [2020-10-06 00:02:36,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637896186] [2020-10-06 00:02:36,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:36,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-06 00:02:36,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:36,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:36,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-06 00:02:36,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [713084267] [2020-10-06 00:02:36,840 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:36,842 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:36,847 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-06 00:02:36,847 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:36,855 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:36,855 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:36,881 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28660#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-06 00:02:36,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-06 00:02:36,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-06 00:02:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-10-06 00:02:36,882 INFO L87 Difference]: Start difference. First operand 79 states and 198 transitions. Second operand 23 states. [2020-10-06 00:02:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:37,805 INFO L93 Difference]: Finished difference Result 109 states and 260 transitions. [2020-10-06 00:02:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-06 00:02:37,806 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-06 00:02:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:37,807 INFO L225 Difference]: With dead ends: 109 [2020-10-06 00:02:37,807 INFO L226 Difference]: Without dead ends: 103 [2020-10-06 00:02:37,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=687, Invalid=1965, Unknown=0, NotChecked=0, Total=2652 [2020-10-06 00:02:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-06 00:02:37,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2020-10-06 00:02:37,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-06 00:02:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 204 transitions. [2020-10-06 00:02:37,810 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 204 transitions. Word has length 26 [2020-10-06 00:02:37,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:37,810 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 204 transitions. [2020-10-06 00:02:37,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-06 00:02:37,811 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 204 transitions. [2020-10-06 00:02:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-06 00:02:37,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:37,811 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:38,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-06 00:02:38,012 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:38,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 86 times [2020-10-06 00:02:38,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:38,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053029126] [2020-10-06 00:02:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:38,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053029126] [2020-10-06 00:02:38,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815018641] [2020-10-06 00:02:38,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:38,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:02:38,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:38,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-06 00:02:38,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:38,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:38,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-06 00:02:38,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1502762504] [2020-10-06 00:02:38,327 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:38,329 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:38,336 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-06 00:02:38,336 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:38,340 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:38,340 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:38,371 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29087#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-06 00:02:38,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-06 00:02:38,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:38,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-06 00:02:38,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-10-06 00:02:38,373 INFO L87 Difference]: Start difference. First operand 81 states and 204 transitions. Second operand 23 states. [2020-10-06 00:02:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:39,368 INFO L93 Difference]: Finished difference Result 107 states and 258 transitions. [2020-10-06 00:02:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-06 00:02:39,369 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-06 00:02:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:39,370 INFO L225 Difference]: With dead ends: 107 [2020-10-06 00:02:39,370 INFO L226 Difference]: Without dead ends: 101 [2020-10-06 00:02:39,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=767, Invalid=2095, Unknown=0, NotChecked=0, Total=2862 [2020-10-06 00:02:39,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-06 00:02:39,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-10-06 00:02:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-06 00:02:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 210 transitions. [2020-10-06 00:02:39,374 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 210 transitions. Word has length 26 [2020-10-06 00:02:39,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:39,374 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 210 transitions. [2020-10-06 00:02:39,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-06 00:02:39,374 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 210 transitions. [2020-10-06 00:02:39,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-06 00:02:39,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:39,375 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:39,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:39,578 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:39,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:39,578 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 87 times [2020-10-06 00:02:39,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:39,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853240987] [2020-10-06 00:02:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:39,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853240987] [2020-10-06 00:02:39,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51343080] [2020-10-06 00:02:39,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:39,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-06 00:02:39,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:39,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-06 00:02:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:39,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:39,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-06 00:02:39,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1237565411] [2020-10-06 00:02:39,909 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:39,912 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:39,918 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-06 00:02:39,919 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:39,923 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:39,923 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:39,953 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29520#(and (<= ~i~0 26) (<= ~j~0 20))] [2020-10-06 00:02:39,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-06 00:02:39,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:39,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-06 00:02:39,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-06 00:02:39,954 INFO L87 Difference]: Start difference. First operand 83 states and 210 transitions. Second operand 23 states. [2020-10-06 00:02:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:41,038 INFO L93 Difference]: Finished difference Result 105 states and 256 transitions. [2020-10-06 00:02:41,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-06 00:02:41,038 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-06 00:02:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:41,039 INFO L225 Difference]: With dead ends: 105 [2020-10-06 00:02:41,040 INFO L226 Difference]: Without dead ends: 99 [2020-10-06 00:02:41,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=2217, Unknown=0, NotChecked=0, Total=3080 [2020-10-06 00:02:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-06 00:02:41,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2020-10-06 00:02:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-06 00:02:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 216 transitions. [2020-10-06 00:02:41,044 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 216 transitions. Word has length 26 [2020-10-06 00:02:41,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:41,044 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 216 transitions. [2020-10-06 00:02:41,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-06 00:02:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 216 transitions. [2020-10-06 00:02:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-06 00:02:41,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:41,045 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:41,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-06 00:02:41,254 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:41,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 88 times [2020-10-06 00:02:41,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:41,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166915639] [2020-10-06 00:02:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:41,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166915639] [2020-10-06 00:02:41,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937285863] [2020-10-06 00:02:41,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:41,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:02:41,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:41,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-06 00:02:41,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:41,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:41,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-06 00:02:41,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1548838222] [2020-10-06 00:02:41,548 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:41,551 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:41,558 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-06 00:02:41,558 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:41,563 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:41,563 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:41,593 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29959#(and (<= ~i~0 26) (<= ~j~0 22))] [2020-10-06 00:02:41,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-06 00:02:41,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:41,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-06 00:02:41,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-10-06 00:02:41,594 INFO L87 Difference]: Start difference. First operand 85 states and 216 transitions. Second operand 23 states. [2020-10-06 00:02:42,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:42,791 INFO L93 Difference]: Finished difference Result 105 states and 259 transitions. [2020-10-06 00:02:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-06 00:02:42,792 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-06 00:02:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:42,793 INFO L225 Difference]: With dead ends: 105 [2020-10-06 00:02:42,793 INFO L226 Difference]: Without dead ends: 99 [2020-10-06 00:02:42,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=975, Invalid=2331, Unknown=0, NotChecked=0, Total=3306 [2020-10-06 00:02:42,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-06 00:02:42,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-10-06 00:02:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-06 00:02:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 224 transitions. [2020-10-06 00:02:42,796 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 224 transitions. Word has length 26 [2020-10-06 00:02:42,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:42,797 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 224 transitions. [2020-10-06 00:02:42,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-06 00:02:42,797 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 224 transitions. [2020-10-06 00:02:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-06 00:02:42,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:42,797 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:42,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-06 00:02:43,000 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:43,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 89 times [2020-10-06 00:02:43,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:43,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460763814] [2020-10-06 00:02:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:43,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460763814] [2020-10-06 00:02:43,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984010931] [2020-10-06 00:02:43,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:43,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-06 00:02:43,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:43,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-06 00:02:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:43,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:43,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-06 00:02:43,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [169211834] [2020-10-06 00:02:43,353 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:43,355 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:43,363 INFO L258 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-06 00:02:43,364 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:43,370 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:43,370 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:43,404 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30406#(and (<= ~i~0 26) (<= ~j~0 24))] [2020-10-06 00:02:43,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-06 00:02:43,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:43,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-06 00:02:43,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-10-06 00:02:43,405 INFO L87 Difference]: Start difference. First operand 87 states and 224 transitions. Second operand 23 states. [2020-10-06 00:02:44,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:44,599 INFO L93 Difference]: Finished difference Result 105 states and 267 transitions. [2020-10-06 00:02:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-06 00:02:44,600 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-06 00:02:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:44,601 INFO L225 Difference]: With dead ends: 105 [2020-10-06 00:02:44,601 INFO L226 Difference]: Without dead ends: 93 [2020-10-06 00:02:44,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1101, Invalid=2439, Unknown=0, NotChecked=0, Total=3540 [2020-10-06 00:02:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-06 00:02:44,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-10-06 00:02:44,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-06 00:02:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-06 00:02:44,604 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 26 [2020-10-06 00:02:44,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:44,604 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-06 00:02:44,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-06 00:02:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-06 00:02:44,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-06 00:02:44,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:44,605 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:44,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:44,806 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:44,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:44,806 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 90 times [2020-10-06 00:02:44,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:44,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121682037] [2020-10-06 00:02:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:45,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121682037] [2020-10-06 00:02:45,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583993719] [2020-10-06 00:02:45,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:45,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-06 00:02:45,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:45,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-06 00:02:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:45,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:45,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-06 00:02:45,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1302919891] [2020-10-06 00:02:45,295 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:45,301 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:45,310 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2020-10-06 00:02:45,311 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:45,322 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:45,322 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:45,364 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:45,365 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:45,385 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:45,386 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:45,390 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:45,390 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:45,399 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30819#(and (<= ~j~0 4) (<= ~i~0 26))] [2020-10-06 00:02:45,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-06 00:02:45,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:45,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-06 00:02:45,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-06 00:02:45,400 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 24 states. [2020-10-06 00:02:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:46,164 INFO L93 Difference]: Finished difference Result 102 states and 238 transitions. [2020-10-06 00:02:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-06 00:02:46,165 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-06 00:02:46,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:46,166 INFO L225 Difference]: With dead ends: 102 [2020-10-06 00:02:46,166 INFO L226 Difference]: Without dead ends: 96 [2020-10-06 00:02:46,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=1403, Unknown=0, NotChecked=0, Total=1980 [2020-10-06 00:02:46,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-06 00:02:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-06 00:02:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-06 00:02:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-10-06 00:02:46,169 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 27 [2020-10-06 00:02:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:46,170 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-10-06 00:02:46,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-06 00:02:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-10-06 00:02:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-06 00:02:46,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:46,171 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:46,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:46,380 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 91 times [2020-10-06 00:02:46,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:46,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123264275] [2020-10-06 00:02:46,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:46,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123264275] [2020-10-06 00:02:46,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071215251] [2020-10-06 00:02:46,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:46,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-06 00:02:46,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:46,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:46,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-06 00:02:46,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1323847842] [2020-10-06 00:02:46,770 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:46,772 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:46,778 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-06 00:02:46,778 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:46,788 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:46,788 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:46,819 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31213#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-06 00:02:46,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-06 00:02:46,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:46,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-06 00:02:46,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-10-06 00:02:46,821 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 24 states. [2020-10-06 00:02:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:47,562 INFO L93 Difference]: Finished difference Result 142 states and 320 transitions. [2020-10-06 00:02:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-06 00:02:47,563 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-06 00:02:47,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:47,564 INFO L225 Difference]: With dead ends: 142 [2020-10-06 00:02:47,564 INFO L226 Difference]: Without dead ends: 136 [2020-10-06 00:02:47,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=636, Invalid=1716, Unknown=0, NotChecked=0, Total=2352 [2020-10-06 00:02:47,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-06 00:02:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 76. [2020-10-06 00:02:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-06 00:02:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 188 transitions. [2020-10-06 00:02:47,567 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 188 transitions. Word has length 27 [2020-10-06 00:02:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:47,567 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 188 transitions. [2020-10-06 00:02:47,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-06 00:02:47,567 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 188 transitions. [2020-10-06 00:02:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-06 00:02:47,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:47,568 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:47,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:47,768 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:47,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 92 times [2020-10-06 00:02:47,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:47,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693204564] [2020-10-06 00:02:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:48,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693204564] [2020-10-06 00:02:48,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872209468] [2020-10-06 00:02:48,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:48,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:02:48,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:48,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-06 00:02:48,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:48,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:48,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-06 00:02:48,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1996223620] [2020-10-06 00:02:48,143 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:48,145 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:48,151 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-06 00:02:48,152 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:48,156 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:48,156 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:48,190 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31659#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:02:48,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-06 00:02:48,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:48,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-06 00:02:48,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-10-06 00:02:48,191 INFO L87 Difference]: Start difference. First operand 76 states and 188 transitions. Second operand 24 states. [2020-10-06 00:02:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:49,011 INFO L93 Difference]: Finished difference Result 139 states and 316 transitions. [2020-10-06 00:02:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-06 00:02:49,012 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-06 00:02:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:49,013 INFO L225 Difference]: With dead ends: 139 [2020-10-06 00:02:49,013 INFO L226 Difference]: Without dead ends: 133 [2020-10-06 00:02:49,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=665, Invalid=1885, Unknown=0, NotChecked=0, Total=2550 [2020-10-06 00:02:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-06 00:02:49,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 78. [2020-10-06 00:02:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-06 00:02:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 194 transitions. [2020-10-06 00:02:49,015 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 194 transitions. Word has length 27 [2020-10-06 00:02:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:49,016 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 194 transitions. [2020-10-06 00:02:49,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-06 00:02:49,016 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 194 transitions. [2020-10-06 00:02:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-06 00:02:49,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:49,017 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:49,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-06 00:02:49,218 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:49,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:49,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 93 times [2020-10-06 00:02:49,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:49,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046788860] [2020-10-06 00:02:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:49,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046788860] [2020-10-06 00:02:49,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590613847] [2020-10-06 00:02:49,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:49,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-06 00:02:49,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:49,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-06 00:02:49,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:49,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:49,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-06 00:02:49,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1342634649] [2020-10-06 00:02:49,590 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:49,592 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:49,598 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-06 00:02:49,599 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:49,609 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:49,609 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:49,634 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32110#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:02:49,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-06 00:02:49,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:49,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-06 00:02:49,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-10-06 00:02:49,636 INFO L87 Difference]: Start difference. First operand 78 states and 194 transitions. Second operand 24 states. [2020-10-06 00:02:50,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:50,509 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2020-10-06 00:02:50,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-06 00:02:50,509 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-06 00:02:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:50,511 INFO L225 Difference]: With dead ends: 137 [2020-10-06 00:02:50,511 INFO L226 Difference]: Without dead ends: 131 [2020-10-06 00:02:50,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=710, Invalid=2046, Unknown=0, NotChecked=0, Total=2756 [2020-10-06 00:02:50,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-06 00:02:50,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 80. [2020-10-06 00:02:50,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-06 00:02:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 200 transitions. [2020-10-06 00:02:50,514 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 200 transitions. Word has length 27 [2020-10-06 00:02:50,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:50,514 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 200 transitions. [2020-10-06 00:02:50,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-06 00:02:50,514 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 200 transitions. [2020-10-06 00:02:50,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-06 00:02:50,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:50,515 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:50,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:50,715 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:50,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:50,716 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 94 times [2020-10-06 00:02:50,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:50,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343912179] [2020-10-06 00:02:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:50,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343912179] [2020-10-06 00:02:50,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936689605] [2020-10-06 00:02:50,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:51,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:02:51,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:51,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-06 00:02:51,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:51,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:51,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-06 00:02:51,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [879243682] [2020-10-06 00:02:51,067 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:51,069 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:51,076 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-06 00:02:51,076 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:51,088 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:51,089 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:51,122 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32567#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:02:51,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-06 00:02:51,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:51,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-06 00:02:51,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-10-06 00:02:51,123 INFO L87 Difference]: Start difference. First operand 80 states and 200 transitions. Second operand 24 states. [2020-10-06 00:02:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:52,065 INFO L93 Difference]: Finished difference Result 135 states and 312 transitions. [2020-10-06 00:02:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-06 00:02:52,066 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-06 00:02:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:52,067 INFO L225 Difference]: With dead ends: 135 [2020-10-06 00:02:52,067 INFO L226 Difference]: Without dead ends: 129 [2020-10-06 00:02:52,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=771, Invalid=2199, Unknown=0, NotChecked=0, Total=2970 [2020-10-06 00:02:52,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-06 00:02:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2020-10-06 00:02:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-06 00:02:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2020-10-06 00:02:52,071 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 27 [2020-10-06 00:02:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:52,071 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2020-10-06 00:02:52,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-06 00:02:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2020-10-06 00:02:52,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-06 00:02:52,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:52,072 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:52,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-06 00:02:52,274 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:52,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:52,274 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 95 times [2020-10-06 00:02:52,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:52,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551240685] [2020-10-06 00:02:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:52,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551240685] [2020-10-06 00:02:52,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230457247] [2020-10-06 00:02:52,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:52,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-06 00:02:52,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:52,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-06 00:02:52,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:52,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:52,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-06 00:02:52,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2008824379] [2020-10-06 00:02:52,636 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:52,638 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:52,644 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-06 00:02:52,645 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:52,667 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:52,667 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:52,694 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33030#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-06 00:02:52,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-06 00:02:52,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:52,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-06 00:02:52,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-06 00:02:52,696 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 24 states. [2020-10-06 00:02:53,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:53,750 INFO L93 Difference]: Finished difference Result 133 states and 310 transitions. [2020-10-06 00:02:53,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-06 00:02:53,751 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-06 00:02:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:53,752 INFO L225 Difference]: With dead ends: 133 [2020-10-06 00:02:53,752 INFO L226 Difference]: Without dead ends: 127 [2020-10-06 00:02:53,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=848, Invalid=2344, Unknown=0, NotChecked=0, Total=3192 [2020-10-06 00:02:53,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-06 00:02:53,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2020-10-06 00:02:53,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-06 00:02:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 212 transitions. [2020-10-06 00:02:53,755 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 212 transitions. Word has length 27 [2020-10-06 00:02:53,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:53,755 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 212 transitions. [2020-10-06 00:02:53,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-06 00:02:53,755 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 212 transitions. [2020-10-06 00:02:53,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-06 00:02:53,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:53,756 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:53,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:53,961 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:53,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:53,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 96 times [2020-10-06 00:02:53,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:53,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951022104] [2020-10-06 00:02:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:54,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951022104] [2020-10-06 00:02:54,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392819423] [2020-10-06 00:02:54,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:54,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-06 00:02:54,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:54,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-06 00:02:54,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:54,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:54,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-06 00:02:54,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [557175406] [2020-10-06 00:02:54,314 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:54,316 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:54,321 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-06 00:02:54,321 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:54,325 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:54,325 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:54,357 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33499#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-06 00:02:54,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-06 00:02:54,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:54,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-06 00:02:54,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-10-06 00:02:54,358 INFO L87 Difference]: Start difference. First operand 84 states and 212 transitions. Second operand 24 states. [2020-10-06 00:02:55,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:55,512 INFO L93 Difference]: Finished difference Result 131 states and 308 transitions. [2020-10-06 00:02:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-06 00:02:55,513 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-06 00:02:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:55,514 INFO L225 Difference]: With dead ends: 131 [2020-10-06 00:02:55,514 INFO L226 Difference]: Without dead ends: 125 [2020-10-06 00:02:55,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=941, Invalid=2481, Unknown=0, NotChecked=0, Total=3422 [2020-10-06 00:02:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-06 00:02:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-06 00:02:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-06 00:02:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 218 transitions. [2020-10-06 00:02:55,517 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 218 transitions. Word has length 27 [2020-10-06 00:02:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:55,517 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 218 transitions. [2020-10-06 00:02:55,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-06 00:02:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 218 transitions. [2020-10-06 00:02:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-06 00:02:55,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:55,518 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:55,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:55,728 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:55,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:55,728 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 97 times [2020-10-06 00:02:55,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:55,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806708961] [2020-10-06 00:02:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:55,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806708961] [2020-10-06 00:02:55,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900973593] [2020-10-06 00:02:55,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:56,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-06 00:02:56,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:56,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:56,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-06 00:02:56,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1242192450] [2020-10-06 00:02:56,058 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:56,060 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:56,066 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-06 00:02:56,067 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:56,071 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:56,071 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:56,104 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33974#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-06 00:02:56,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-06 00:02:56,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:56,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-06 00:02:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-06 00:02:56,105 INFO L87 Difference]: Start difference. First operand 86 states and 218 transitions. Second operand 24 states. [2020-10-06 00:02:57,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:57,342 INFO L93 Difference]: Finished difference Result 129 states and 306 transitions. [2020-10-06 00:02:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-06 00:02:57,342 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-06 00:02:57,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:57,343 INFO L225 Difference]: With dead ends: 129 [2020-10-06 00:02:57,343 INFO L226 Difference]: Without dead ends: 123 [2020-10-06 00:02:57,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1050, Invalid=2610, Unknown=0, NotChecked=0, Total=3660 [2020-10-06 00:02:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-06 00:02:57,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2020-10-06 00:02:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-06 00:02:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 224 transitions. [2020-10-06 00:02:57,345 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 224 transitions. Word has length 27 [2020-10-06 00:02:57,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:57,346 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 224 transitions. [2020-10-06 00:02:57,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-06 00:02:57,346 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 224 transitions. [2020-10-06 00:02:57,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-06 00:02:57,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:57,346 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:57,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-06 00:02:57,547 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 98 times [2020-10-06 00:02:57,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:57,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655180003] [2020-10-06 00:02:57,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:02:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:57,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655180003] [2020-10-06 00:02:57,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593250865] [2020-10-06 00:02:57,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:02:57,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:02:57,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:02:57,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-06 00:02:57,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:02:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:02:57,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:02:57,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-06 00:02:57,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [384941305] [2020-10-06 00:02:57,883 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:02:57,885 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:02:57,893 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-06 00:02:57,893 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:02:57,898 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:02:57,898 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:02:57,930 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34455#(and (<= ~i~0 26) (<= ~j~0 20))] [2020-10-06 00:02:57,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-06 00:02:57,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:02:57,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-06 00:02:57,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-10-06 00:02:57,931 INFO L87 Difference]: Start difference. First operand 88 states and 224 transitions. Second operand 24 states. [2020-10-06 00:02:59,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:02:59,565 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-06 00:02:59,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-06 00:02:59,566 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-06 00:02:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:02:59,567 INFO L225 Difference]: With dead ends: 129 [2020-10-06 00:02:59,567 INFO L226 Difference]: Without dead ends: 123 [2020-10-06 00:02:59,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1175, Invalid=2731, Unknown=0, NotChecked=0, Total=3906 [2020-10-06 00:02:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-06 00:02:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 90. [2020-10-06 00:02:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-06 00:02:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 232 transitions. [2020-10-06 00:02:59,571 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 232 transitions. Word has length 27 [2020-10-06 00:02:59,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:02:59,571 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 232 transitions. [2020-10-06 00:02:59,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-06 00:02:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 232 transitions. [2020-10-06 00:02:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-06 00:02:59,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:02:59,572 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:02:59,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-10-06 00:02:59,781 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:02:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:02:59,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 99 times [2020-10-06 00:02:59,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:02:59,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580786030] [2020-10-06 00:02:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:02:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:00,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580786030] [2020-10-06 00:03:00,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443258883] [2020-10-06 00:03:00,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:00,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-06 00:03:00,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:03:00,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-06 00:03:00,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:03:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:00,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:03:00,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-06 00:03:00,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1346982894] [2020-10-06 00:03:00,102 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:03:00,105 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:03:00,110 INFO L258 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-06 00:03:00,110 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:03:00,128 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:03:00,128 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:03:00,160 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34944#(and (<= ~i~0 26) (<= ~j~0 22))] [2020-10-06 00:03:00,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-06 00:03:00,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:03:00,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-06 00:03:00,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2020-10-06 00:03:00,161 INFO L87 Difference]: Start difference. First operand 90 states and 232 transitions. Second operand 24 states. [2020-10-06 00:03:01,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:03:01,532 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-10-06 00:03:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-06 00:03:01,533 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-06 00:03:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:03:01,534 INFO L225 Difference]: With dead ends: 130 [2020-10-06 00:03:01,534 INFO L226 Difference]: Without dead ends: 118 [2020-10-06 00:03:01,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1314, Invalid=2846, Unknown=0, NotChecked=0, Total=4160 [2020-10-06 00:03:01,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-06 00:03:01,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 70. [2020-10-06 00:03:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-06 00:03:01,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-06 00:03:01,537 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 27 [2020-10-06 00:03:01,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:03:01,537 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-06 00:03:01,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-06 00:03:01,537 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-06 00:03:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-06 00:03:01,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:03:01,538 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:03:01,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:01,742 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:03:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:03:01,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 100 times [2020-10-06 00:03:01,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:03:01,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432382487] [2020-10-06 00:03:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:03:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:02,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432382487] [2020-10-06 00:03:02,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082251112] [2020-10-06 00:03:02,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:02,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:03:02,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:03:02,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-06 00:03:02,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:03:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:02,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:03:02,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-06 00:03:02,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [672595757] [2020-10-06 00:03:02,171 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:03:02,173 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:03:02,180 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 44 transitions. [2020-10-06 00:03:02,180 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:03:02,184 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:03:02,184 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:03:02,221 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35402#(and (<= ~i~0 26) (<= ~j~0 8))] [2020-10-06 00:03:02,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-06 00:03:02,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:03:02,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-06 00:03:02,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-10-06 00:03:02,222 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 25 states. [2020-10-06 00:03:02,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:03:02,935 INFO L93 Difference]: Finished difference Result 126 states and 288 transitions. [2020-10-06 00:03:02,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-06 00:03:02,936 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-06 00:03:02,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:03:02,937 INFO L225 Difference]: With dead ends: 126 [2020-10-06 00:03:02,938 INFO L226 Difference]: Without dead ends: 120 [2020-10-06 00:03:02,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=1624, Unknown=0, NotChecked=0, Total=2256 [2020-10-06 00:03:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-06 00:03:02,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 77. [2020-10-06 00:03:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-06 00:03:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-06 00:03:02,941 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 28 [2020-10-06 00:03:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:03:02,941 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-06 00:03:02,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-06 00:03:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-06 00:03:02,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-06 00:03:02,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:03:02,942 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:03:03,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-06 00:03:03,146 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:03:03,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:03:03,146 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 101 times [2020-10-06 00:03:03,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:03:03,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181533206] [2020-10-06 00:03:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:03:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:03,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181533206] [2020-10-06 00:03:03,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758746761] [2020-10-06 00:03:03,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:03,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-06 00:03:03,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:03:03,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-06 00:03:03,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:03:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:03,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:03:03,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-06 00:03:03,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [343187434] [2020-10-06 00:03:03,580 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:03:03,582 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:03:03,590 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-06 00:03:03,591 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:03:03,601 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:03:03,602 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:03:03,631 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35834#(and (<= ~j~0 10) (<= ~i~0 26))] [2020-10-06 00:03:03,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-06 00:03:03,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:03:03,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-06 00:03:03,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-06 00:03:03,632 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 25 states. [2020-10-06 00:03:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:03:04,412 INFO L93 Difference]: Finished difference Result 123 states and 284 transitions. [2020-10-06 00:03:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-06 00:03:04,413 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-06 00:03:04,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:03:04,414 INFO L225 Difference]: With dead ends: 123 [2020-10-06 00:03:04,414 INFO L226 Difference]: Without dead ends: 117 [2020-10-06 00:03:04,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-10-06 00:03:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-06 00:03:04,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-06 00:03:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-06 00:03:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 196 transitions. [2020-10-06 00:03:04,416 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 196 transitions. Word has length 28 [2020-10-06 00:03:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:03:04,416 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 196 transitions. [2020-10-06 00:03:04,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-06 00:03:04,417 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 196 transitions. [2020-10-06 00:03:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-06 00:03:04,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:03:04,418 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:03:04,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-06 00:03:04,619 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:03:04,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:03:04,620 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 102 times [2020-10-06 00:03:04,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:03:04,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717032058] [2020-10-06 00:03:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:03:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:04,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717032058] [2020-10-06 00:03:04,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670535748] [2020-10-06 00:03:04,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:05,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-06 00:03:05,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:03:05,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-06 00:03:05,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:03:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:05,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:03:05,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-06 00:03:05,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1148669500] [2020-10-06 00:03:05,045 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:03:05,047 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:03:05,053 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-06 00:03:05,053 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:03:05,069 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:03:05,069 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:03:05,097 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36271#(and (<= ~j~0 12) (<= ~i~0 26))] [2020-10-06 00:03:05,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-06 00:03:05,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:03:05,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-06 00:03:05,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-06 00:03:05,097 INFO L87 Difference]: Start difference. First operand 79 states and 196 transitions. Second operand 25 states. [2020-10-06 00:03:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:03:05,985 INFO L93 Difference]: Finished difference Result 121 states and 282 transitions. [2020-10-06 00:03:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-06 00:03:05,986 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-06 00:03:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:03:05,987 INFO L225 Difference]: With dead ends: 121 [2020-10-06 00:03:05,987 INFO L226 Difference]: Without dead ends: 115 [2020-10-06 00:03:05,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=676, Invalid=1976, Unknown=0, NotChecked=0, Total=2652 [2020-10-06 00:03:05,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-06 00:03:05,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-06 00:03:05,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-06 00:03:05,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2020-10-06 00:03:05,990 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 28 [2020-10-06 00:03:05,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:03:05,990 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2020-10-06 00:03:05,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-06 00:03:05,990 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2020-10-06 00:03:05,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-06 00:03:05,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:03:05,991 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:03:06,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-06 00:03:06,200 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:03:06,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:03:06,201 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 103 times [2020-10-06 00:03:06,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:03:06,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083422630] [2020-10-06 00:03:06,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:03:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:06,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083422630] [2020-10-06 00:03:06,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89136915] [2020-10-06 00:03:06,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:06,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-06 00:03:06,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:03:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:06,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:03:06,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-06 00:03:06,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [735144590] [2020-10-06 00:03:06,605 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:03:06,607 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:03:06,615 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-06 00:03:06,615 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:03:06,625 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:03:06,625 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:03:06,654 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36714#(and (<= ~j~0 14) (<= ~i~0 26))] [2020-10-06 00:03:06,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-06 00:03:06,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:03:06,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-06 00:03:06,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-10-06 00:03:06,656 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 25 states. [2020-10-06 00:03:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:03:07,611 INFO L93 Difference]: Finished difference Result 119 states and 280 transitions. [2020-10-06 00:03:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-06 00:03:07,612 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-06 00:03:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:03:07,612 INFO L225 Difference]: With dead ends: 119 [2020-10-06 00:03:07,612 INFO L226 Difference]: Without dead ends: 113 [2020-10-06 00:03:07,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=722, Invalid=2140, Unknown=0, NotChecked=0, Total=2862 [2020-10-06 00:03:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-06 00:03:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-06 00:03:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-06 00:03:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 208 transitions. [2020-10-06 00:03:07,616 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 208 transitions. Word has length 28 [2020-10-06 00:03:07,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:03:07,616 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 208 transitions. [2020-10-06 00:03:07,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-06 00:03:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 208 transitions. [2020-10-06 00:03:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-06 00:03:07,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:03:07,618 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:03:07,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:07,819 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:03:07,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:03:07,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 104 times [2020-10-06 00:03:07,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:03:07,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751721814] [2020-10-06 00:03:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:03:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:08,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751721814] [2020-10-06 00:03:08,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52574345] [2020-10-06 00:03:08,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:08,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:03:08,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:03:08,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-06 00:03:08,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:03:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:08,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:03:08,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-06 00:03:08,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1844904203] [2020-10-06 00:03:08,200 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:03:08,202 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:03:08,207 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-06 00:03:08,207 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:03:08,208 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:03:08,208 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:03:08,250 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37163#(and (<= ~i~0 26) (<= ~j~0 16))] [2020-10-06 00:03:08,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-06 00:03:08,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:03:08,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-06 00:03:08,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-06 00:03:08,251 INFO L87 Difference]: Start difference. First operand 83 states and 208 transitions. Second operand 25 states. [2020-10-06 00:03:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:03:09,329 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-10-06 00:03:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-06 00:03:09,330 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-06 00:03:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:03:09,330 INFO L225 Difference]: With dead ends: 117 [2020-10-06 00:03:09,330 INFO L226 Difference]: Without dead ends: 111 [2020-10-06 00:03:09,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=784, Invalid=2296, Unknown=0, NotChecked=0, Total=3080 [2020-10-06 00:03:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-06 00:03:09,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2020-10-06 00:03:09,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-06 00:03:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 214 transitions. [2020-10-06 00:03:09,334 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 214 transitions. Word has length 28 [2020-10-06 00:03:09,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:03:09,334 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 214 transitions. [2020-10-06 00:03:09,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-06 00:03:09,335 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 214 transitions. [2020-10-06 00:03:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-06 00:03:09,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:03:09,335 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:03:09,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-06 00:03:09,544 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:03:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:03:09,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 105 times [2020-10-06 00:03:09,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:03:09,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558157267] [2020-10-06 00:03:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:03:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:09,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558157267] [2020-10-06 00:03:09,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584375006] [2020-10-06 00:03:09,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:09,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-06 00:03:09,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:03:09,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-06 00:03:09,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:03:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:09,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:03:09,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-06 00:03:09,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [250004008] [2020-10-06 00:03:09,921 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:03:09,923 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:03:09,930 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-06 00:03:09,931 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:03:09,931 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:03:09,932 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:03:09,974 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37618#(and (<= ~i~0 26) (<= ~j~0 18))] [2020-10-06 00:03:09,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-06 00:03:09,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:03:09,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-06 00:03:09,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-06 00:03:09,975 INFO L87 Difference]: Start difference. First operand 85 states and 214 transitions. Second operand 25 states. [2020-10-06 00:03:11,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:03:11,151 INFO L93 Difference]: Finished difference Result 115 states and 276 transitions. [2020-10-06 00:03:11,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-06 00:03:11,151 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-06 00:03:11,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:03:11,152 INFO L225 Difference]: With dead ends: 115 [2020-10-06 00:03:11,152 INFO L226 Difference]: Without dead ends: 109 [2020-10-06 00:03:11,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=862, Invalid=2444, Unknown=0, NotChecked=0, Total=3306 [2020-10-06 00:03:11,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-06 00:03:11,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2020-10-06 00:03:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-06 00:03:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 220 transitions. [2020-10-06 00:03:11,155 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 220 transitions. Word has length 28 [2020-10-06 00:03:11,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:03:11,155 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 220 transitions. [2020-10-06 00:03:11,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-06 00:03:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 220 transitions. [2020-10-06 00:03:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-06 00:03:11,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:03:11,156 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:03:11,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-06 00:03:11,361 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:03:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:03:11,361 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 106 times [2020-10-06 00:03:11,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:03:11,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696883474] [2020-10-06 00:03:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:03:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:11,662 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:11,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696883474] [2020-10-06 00:03:11,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907806958] [2020-10-06 00:03:11,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:11,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 00:03:11,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:03:11,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-06 00:03:11,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:03:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:11,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:03:11,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-06 00:03:11,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [196918700] [2020-10-06 00:03:11,736 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:03:11,737 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:03:11,743 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-06 00:03:11,743 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:03:11,753 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:03:11,753 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:03:11,782 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38079#(and (<= ~i~0 26) (<= ~j~0 20))] [2020-10-06 00:03:11,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-06 00:03:11,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:03:11,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-06 00:03:11,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-10-06 00:03:11,783 INFO L87 Difference]: Start difference. First operand 87 states and 220 transitions. Second operand 25 states. [2020-10-06 00:03:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:03:13,036 INFO L93 Difference]: Finished difference Result 113 states and 274 transitions. [2020-10-06 00:03:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-06 00:03:13,037 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-06 00:03:13,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:03:13,037 INFO L225 Difference]: With dead ends: 113 [2020-10-06 00:03:13,037 INFO L226 Difference]: Without dead ends: 107 [2020-10-06 00:03:13,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=956, Invalid=2584, Unknown=0, NotChecked=0, Total=3540 [2020-10-06 00:03:13,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-06 00:03:13,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2020-10-06 00:03:13,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-06 00:03:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 226 transitions. [2020-10-06 00:03:13,040 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 226 transitions. Word has length 28 [2020-10-06 00:03:13,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:03:13,040 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 226 transitions. [2020-10-06 00:03:13,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-06 00:03:13,041 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 226 transitions. [2020-10-06 00:03:13,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-06 00:03:13,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:03:13,041 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:03:13,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-06 00:03:13,242 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:03:13,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:03:13,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 107 times [2020-10-06 00:03:13,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:03:13,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347905817] [2020-10-06 00:03:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:03:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:13,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347905817] [2020-10-06 00:03:13,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869469384] [2020-10-06 00:03:13,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:13,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-06 00:03:13,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:03:13,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-06 00:03:13,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:03:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:13,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:03:13,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-06 00:03:13,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [603772654] [2020-10-06 00:03:13,619 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:03:13,621 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:03:13,626 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-06 00:03:13,626 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:03:13,627 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:03:13,627 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:03:13,662 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38546#(and (<= ~i~0 26) (<= ~j~0 22))] [2020-10-06 00:03:13,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-06 00:03:13,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:03:13,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-06 00:03:13,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-06 00:03:13,663 INFO L87 Difference]: Start difference. First operand 89 states and 226 transitions. Second operand 25 states. [2020-10-06 00:03:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:03:15,025 INFO L93 Difference]: Finished difference Result 111 states and 272 transitions. [2020-10-06 00:03:15,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-06 00:03:15,026 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-06 00:03:15,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:03:15,027 INFO L225 Difference]: With dead ends: 111 [2020-10-06 00:03:15,027 INFO L226 Difference]: Without dead ends: 105 [2020-10-06 00:03:15,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1066, Invalid=2716, Unknown=0, NotChecked=0, Total=3782 [2020-10-06 00:03:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-06 00:03:15,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-06 00:03:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-06 00:03:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 232 transitions. [2020-10-06 00:03:15,031 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 232 transitions. Word has length 28 [2020-10-06 00:03:15,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:03:15,031 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 232 transitions. [2020-10-06 00:03:15,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-06 00:03:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 232 transitions. [2020-10-06 00:03:15,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-06 00:03:15,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:03:15,032 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:03:15,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:15,239 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:03:15,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:03:15,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 108 times [2020-10-06 00:03:15,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:03:15,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112013632] [2020-10-06 00:03:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:03:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:15,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112013632] [2020-10-06 00:03:15,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349411399] [2020-10-06 00:03:15,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:15,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-06 00:03:15,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:03:15,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-06 00:03:15,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:03:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:15,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:03:15,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-06 00:03:15,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2033105958] [2020-10-06 00:03:15,627 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:03:15,630 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:03:15,637 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-06 00:03:15,637 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:03:15,648 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:03:15,648 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:03:15,682 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39019#(and (<= ~i~0 26) (<= ~j~0 24))] [2020-10-06 00:03:15,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-06 00:03:15,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:03:15,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-06 00:03:15,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-06 00:03:15,683 INFO L87 Difference]: Start difference. First operand 91 states and 232 transitions. Second operand 25 states. [2020-10-06 00:03:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:03:17,114 INFO L93 Difference]: Finished difference Result 111 states and 275 transitions. [2020-10-06 00:03:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-06 00:03:17,114 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-06 00:03:17,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:03:17,115 INFO L225 Difference]: With dead ends: 111 [2020-10-06 00:03:17,115 INFO L226 Difference]: Without dead ends: 105 [2020-10-06 00:03:17,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1192, Invalid=2840, Unknown=0, NotChecked=0, Total=4032 [2020-10-06 00:03:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-06 00:03:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-10-06 00:03:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-06 00:03:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 240 transitions. [2020-10-06 00:03:17,119 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 240 transitions. Word has length 28 [2020-10-06 00:03:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:03:17,119 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 240 transitions. [2020-10-06 00:03:17,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-06 00:03:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 240 transitions. [2020-10-06 00:03:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-06 00:03:17,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:03:17,120 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:03:17,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:17,329 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:03:17,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:03:17,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 109 times [2020-10-06 00:03:17,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:03:17,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359673081] [2020-10-06 00:03:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:03:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:17,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359673081] [2020-10-06 00:03:17,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505563714] [2020-10-06 00:03:17,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:17,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-06 00:03:17,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:03:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:17,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:03:17,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-06 00:03:17,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1575842687] [2020-10-06 00:03:17,708 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:03:17,709 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:03:17,716 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-06 00:03:17,716 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:03:17,717 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-06 00:03:17,717 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-06 00:03:17,755 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39500#(and (<= ~j~0 26) (<= ~i~0 26))] [2020-10-06 00:03:17,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-06 00:03:17,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:03:17,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-06 00:03:17,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-10-06 00:03:17,756 INFO L87 Difference]: Start difference. First operand 93 states and 240 transitions. Second operand 25 states. [2020-10-06 00:03:19,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:03:19,203 INFO L93 Difference]: Finished difference Result 109 states and 275 transitions. [2020-10-06 00:03:19,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-06 00:03:19,204 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-06 00:03:19,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:03:19,205 INFO L225 Difference]: With dead ends: 109 [2020-10-06 00:03:19,205 INFO L226 Difference]: Without dead ends: 100 [2020-10-06 00:03:19,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1308, Invalid=2852, Unknown=0, NotChecked=0, Total=4160 [2020-10-06 00:03:19,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-06 00:03:19,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-10-06 00:03:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-06 00:03:19,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-06 00:03:19,208 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-10-06 00:03:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:03:19,208 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-06 00:03:19,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-06 00:03:19,208 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-06 00:03:19,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-06 00:03:19,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:03:19,209 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:03:19,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:19,418 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:03:19,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:03:19,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 110 times [2020-10-06 00:03:19,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:03:19,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270715006] [2020-10-06 00:03:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:03:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:19,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270715006] [2020-10-06 00:03:19,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130260906] [2020-10-06 00:03:19,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:19,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 00:03:19,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:03:19,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-06 00:03:19,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:03:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:19,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-06 00:03:19,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-10-06 00:03:19,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1795092261] [2020-10-06 00:03:19,639 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:03:19,640 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:03:19,647 INFO L258 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2020-10-06 00:03:19,647 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:03:19,670 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-06 00:03:19,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-06 00:03:19,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:03:19,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-06 00:03:19,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-06 00:03:19,671 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 13 states. [2020-10-06 00:03:19,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:03:19,707 INFO L93 Difference]: Finished difference Result 421 states and 1013 transitions. [2020-10-06 00:03:19,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-06 00:03:19,708 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-06 00:03:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:03:19,708 INFO L225 Difference]: With dead ends: 421 [2020-10-06 00:03:19,708 INFO L226 Difference]: Without dead ends: 70 [2020-10-06 00:03:19,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-06 00:03:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-06 00:03:19,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-06 00:03:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-06 00:03:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2020-10-06 00:03:19,710 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 29 [2020-10-06 00:03:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:03:19,710 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2020-10-06 00:03:19,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-06 00:03:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2020-10-06 00:03:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-06 00:03:19,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:03:19,710 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:03:19,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-06 00:03:19,911 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:03:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:03:19,912 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 111 times [2020-10-06 00:03:19,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:03:19,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785136073] [2020-10-06 00:03:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:03:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:03:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:20,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785136073] [2020-10-06 00:03:20,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065704544] [2020-10-06 00:03:20,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:03:20,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-06 00:03:20,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 00:03:20,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-06 00:03:20,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:03:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 00:03:20,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-06 00:03:20,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [23] total 36 [2020-10-06 00:03:20,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1812053805] [2020-10-06 00:03:20,763 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:03:20,765 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:03:20,772 INFO L258 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2020-10-06 00:03:20,772 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:03:20,845 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-06 00:03:20,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-06 00:03:20,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:03:20,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-06 00:03:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-10-06 00:03:20,847 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand 13 states. [2020-10-06 00:03:20,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 00:03:20,887 INFO L93 Difference]: Finished difference Result 256 states and 475 transitions. [2020-10-06 00:03:20,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-06 00:03:20,888 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-06 00:03:20,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 00:03:20,888 INFO L225 Difference]: With dead ends: 256 [2020-10-06 00:03:20,888 INFO L226 Difference]: Without dead ends: 0 [2020-10-06 00:03:20,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-10-06 00:03:20,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-06 00:03:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-06 00:03:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-06 00:03:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-06 00:03:20,889 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-06 00:03:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:03:20,890 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-06 00:03:20,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-06 00:03:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-06 00:03:20,890 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-06 00:03:21,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-06 00:03:21,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.10 12:03:21 BasicIcfg [2020-10-06 00:03:21,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-06 00:03:21,097 INFO L168 Benchmark]: Toolchain (without parser) took 136390.59 ms. Allocated memory was 140.0 MB in the beginning and 385.4 MB in the end (delta: 245.4 MB). Free memory was 100.8 MB in the beginning and 131.5 MB in the end (delta: -30.7 MB). Peak memory consumption was 214.7 MB. Max. memory is 7.1 GB. [2020-10-06 00:03:21,098 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 119.8 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-10-06 00:03:21,099 INFO L168 Benchmark]: CACSL2BoogieTranslator took 766.55 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 100.4 MB in the beginning and 163.3 MB in the end (delta: -62.9 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-10-06 00:03:21,099 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.54 ms. Allocated memory is still 204.5 MB. Free memory was 163.3 MB in the beginning and 161.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-06 00:03:21,099 INFO L168 Benchmark]: Boogie Preprocessor took 31.84 ms. Allocated memory is still 204.5 MB. Free memory was 161.3 MB in the beginning and 160.4 MB in the end (delta: 960.2 kB). Peak memory consumption was 960.2 kB. Max. memory is 7.1 GB. [2020-10-06 00:03:21,100 INFO L168 Benchmark]: RCFGBuilder took 463.20 ms. Allocated memory is still 204.5 MB. Free memory was 160.4 MB in the beginning and 139.6 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-10-06 00:03:21,100 INFO L168 Benchmark]: TraceAbstraction took 135066.07 ms. Allocated memory was 204.5 MB in the beginning and 385.4 MB in the end (delta: 180.9 MB). Free memory was 138.6 MB in the beginning and 131.5 MB in the end (delta: 7.1 MB). Peak memory consumption was 188.0 MB. Max. memory is 7.1 GB. [2020-10-06 00:03:21,102 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 119.8 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 766.55 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 100.4 MB in the beginning and 163.3 MB in the end (delta: -62.9 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 56.54 ms. Allocated memory is still 204.5 MB. Free memory was 163.3 MB in the beginning and 161.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.84 ms. Allocated memory is still 204.5 MB. Free memory was 161.3 MB in the beginning and 160.4 MB in the end (delta: 960.2 kB). Peak memory consumption was 960.2 kB. Max. memory is 7.1 GB. * RCFGBuilder took 463.20 ms. Allocated memory is still 204.5 MB. Free memory was 160.4 MB in the beginning and 139.6 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 135066.07 ms. Allocated memory was 204.5 MB in the beginning and 385.4 MB in the end (delta: 180.9 MB). Free memory was 138.6 MB in the beginning and 131.5 MB in the end (delta: 7.1 MB). Peak memory consumption was 188.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - 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: 134.9s, OverallIterations: 113, TraceHistogramMax: 11, AutomataDifference: 74.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 1674 SDtfs, 6701 SDslu, 11584 SDs, 0 SdLazy, 12732 SolverSat, 8213 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7265 GetRequests, 2756 SyntacticMatches, 139 SemanticMatches, 4370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47331 ImplicationChecksByTransitivity, 77.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 113 MinimizatonAttempts, 2865 StatesRemovedByMinimization, 110 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 22.9s InterpolantComputationTime, 4832 NumberOfCodeBlocks, 4832 NumberOfCodeBlocksAsserted, 600 NumberOfCheckSat, 4609 ConstructedInterpolants, 0 QuantifiedInterpolants, 458917 SizeOfPredicates, 1482 NumberOfNonLiveVariables, 14660 ConjunctsInSsa, 1938 ConjunctsInUnsatCore, 223 InterpolantComputations, 5 PerfectInterpolantSequences, 290/10300 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...