/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-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-16 01:36:25,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-16 01:36:25,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-16 01:36:25,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-16 01:36:25,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-16 01:36:25,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-16 01:36:25,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-16 01:36:25,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-16 01:36:25,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-16 01:36:25,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-16 01:36:25,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-16 01:36:25,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-16 01:36:25,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-16 01:36:25,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-16 01:36:25,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-16 01:36:25,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-16 01:36:25,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-16 01:36:25,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-16 01:36:25,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-16 01:36:25,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-16 01:36:25,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-16 01:36:25,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-16 01:36:25,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-16 01:36:25,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-16 01:36:25,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-16 01:36:25,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-16 01:36:25,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-16 01:36:25,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-16 01:36:25,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-16 01:36:25,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-16 01:36:25,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-16 01:36:25,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-16 01:36:25,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-16 01:36:25,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-16 01:36:25,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-16 01:36:25,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-16 01:36:25,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-16 01:36:25,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-16 01:36:25,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-16 01:36:25,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-16 01:36:25,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-16 01:36:25,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-16 01:36:25,646 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-16 01:36:25,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-16 01:36:25,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-16 01:36:25,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-16 01:36:25,649 INFO L138 SettingsManager]: * Use SBE=true [2020-09-16 01:36:25,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-16 01:36:25,649 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-16 01:36:25,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-16 01:36:25,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-16 01:36:25,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-16 01:36:25,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-16 01:36:25,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-16 01:36:25,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-16 01:36:25,651 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-16 01:36:25,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-16 01:36:25,651 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-16 01:36:25,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-16 01:36:25,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-16 01:36:25,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-16 01:36:25,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-16 01:36:25,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-16 01:36:25,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-16 01:36:25,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-16 01:36:25,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-16 01:36:25,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-16 01:36:25,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-16 01:36:25,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-16 01:36:25,653 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-16 01:36:25,654 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-16 01:36:25,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-16 01:36:25,654 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-16 01:36:26,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-16 01:36:26,215 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-16 01:36:26,225 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-16 01:36:26,227 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-16 01:36:26,230 INFO L275 PluginConnector]: CDTParser initialized [2020-09-16 01:36:26,233 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-16 01:36:26,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a960a7a4/b46457c0cb834ac9b9ad9bde32d5bbdd/FLAGe757653ca [2020-09-16 01:36:27,059 INFO L306 CDTParser]: Found 1 translation units. [2020-09-16 01:36:27,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-16 01:36:27,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a960a7a4/b46457c0cb834ac9b9ad9bde32d5bbdd/FLAGe757653ca [2020-09-16 01:36:27,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a960a7a4/b46457c0cb834ac9b9ad9bde32d5bbdd [2020-09-16 01:36:27,242 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-16 01:36:27,250 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-16 01:36:27,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-16 01:36:27,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-16 01:36:27,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-16 01:36:27,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 01:36:27" (1/1) ... [2020-09-16 01:36:27,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@148d86a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:36:27, skipping insertion in model container [2020-09-16 01:36:27,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 01:36:27" (1/1) ... [2020-09-16 01:36:27,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-16 01:36:27,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-16 01:36:28,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 01:36:28,300 INFO L203 MainTranslator]: Completed pre-run [2020-09-16 01:36:28,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 01:36:28,602 INFO L208 MainTranslator]: Completed translation [2020-09-16 01:36:28,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:36:28 WrapperNode [2020-09-16 01:36:28,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-16 01:36:28,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-16 01:36:28,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-16 01:36:28,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-16 01:36:28,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:36:28" (1/1) ... [2020-09-16 01:36:28,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:36:28" (1/1) ... [2020-09-16 01:36:28,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-16 01:36:28,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-16 01:36:28,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-16 01:36:28,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-16 01:36:28,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:36:28" (1/1) ... [2020-09-16 01:36:28,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:36:28" (1/1) ... [2020-09-16 01:36:28,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:36:28" (1/1) ... [2020-09-16 01:36:28,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:36:28" (1/1) ... [2020-09-16 01:36:28,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:36:28" (1/1) ... [2020-09-16 01:36:28,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:36:28" (1/1) ... [2020-09-16 01:36:28,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:36:28" (1/1) ... [2020-09-16 01:36:28,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-16 01:36:28,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-16 01:36:28,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-16 01:36:28,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-16 01:36:28,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:36:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-16 01:36:28,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-16 01:36:28,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-16 01:36:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-16 01:36:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-16 01:36:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-09-16 01:36:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-09-16 01:36:28,799 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-09-16 01:36:28,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-16 01:36:28,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-16 01:36:28,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-16 01:36:28,802 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-16 01:36:29,241 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-16 01:36:29,241 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-16 01:36:29,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 01:36:29 BoogieIcfgContainer [2020-09-16 01:36:29,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-16 01:36:29,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-16 01:36:29,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-16 01:36:29,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-16 01:36:29,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 01:36:27" (1/3) ... [2020-09-16 01:36:29,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6e4b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 01:36:29, skipping insertion in model container [2020-09-16 01:36:29,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:36:28" (2/3) ... [2020-09-16 01:36:29,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6e4b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 01:36:29, skipping insertion in model container [2020-09-16 01:36:29,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 01:36:29" (3/3) ... [2020-09-16 01:36:29,257 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-09-16 01:36:29,269 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-16 01:36:29,269 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-16 01:36:29,279 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-16 01:36:29,281 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-16 01:36:29,309 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,309 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,310 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,310 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,310 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,310 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,311 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,311 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,311 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,311 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,312 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,312 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,312 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,313 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,313 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,313 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,313 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,313 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,314 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,314 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,314 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,314 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,315 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,319 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,319 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,320 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,320 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,320 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,320 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,320 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,321 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,321 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:36:29,352 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-16 01:36:29,376 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 01:36:29,376 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 01:36:29,377 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-16 01:36:29,377 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-16 01:36:29,377 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 01:36:29,377 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 01:36:29,377 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 01:36:29,377 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 01:36:29,396 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-09-16 01:36:29,399 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-16 01:36:29,456 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-16 01:36:29,456 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-16 01:36:29,463 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-16 01:36:29,466 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-16 01:36:29,499 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-16 01:36:29,499 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-16 01:36:29,500 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-16 01:36:29,502 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 646 [2020-09-16 01:36:29,503 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-16 01:36:31,286 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-16 01:36:31,480 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-09-16 01:36:32,220 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-09-16 01:36:32,517 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-09-16 01:36:32,531 INFO L206 etLargeBlockEncoding]: Checked pairs total: 738 [2020-09-16 01:36:32,532 INFO L214 etLargeBlockEncoding]: Total number of compositions: 70 [2020-09-16 01:36:32,537 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-09-16 01:36:32,550 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-09-16 01:36:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-16 01:36:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 01:36:32,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:32,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:32,564 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:32,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:32,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-09-16 01:36:32,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:32,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084566758] [2020-09-16 01:36:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:36:32,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084566758] [2020-09-16 01:36:32,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:36:32,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 01:36:32,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1431552751] [2020-09-16 01:36:32,847 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:32,851 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:32,870 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-09-16 01:36:32,871 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:32,911 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [154#(< ULTIMATE.start_main_~i~1 20)] [2020-09-16 01:36:32,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-16 01:36:32,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:32,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-16 01:36:32,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:36:32,935 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 4 states. [2020-09-16 01:36:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:32,979 INFO L93 Difference]: Finished difference Result 58 states and 112 transitions. [2020-09-16 01:36:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 01:36:32,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-09-16 01:36:32,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:33,001 INFO L225 Difference]: With dead ends: 58 [2020-09-16 01:36:33,001 INFO L226 Difference]: Without dead ends: 58 [2020-09-16 01:36:33,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:36:33,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-16 01:36:33,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-09-16 01:36:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-16 01:36:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 112 transitions. [2020-09-16 01:36:33,062 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 112 transitions. Word has length 8 [2020-09-16 01:36:33,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:33,062 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 112 transitions. [2020-09-16 01:36:33,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-16 01:36:33,063 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 112 transitions. [2020-09-16 01:36:33,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 01:36:33,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:33,064 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:33,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-16 01:36:33,065 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:33,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:33,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1202349723, now seen corresponding path program 1 times [2020-09-16 01:36:33,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:33,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57928463] [2020-09-16 01:36:33,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-16 01:36:33,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57928463] [2020-09-16 01:36:33,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:36:33,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 01:36:33,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1503131432] [2020-09-16 01:36:33,208 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:33,211 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:33,224 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 46 transitions. [2020-09-16 01:36:33,225 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:33,326 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [332#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-16 01:36:33,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-16 01:36:33,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:33,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-16 01:36:33,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:36:33,330 INFO L87 Difference]: Start difference. First operand 58 states and 112 transitions. Second operand 4 states. [2020-09-16 01:36:33,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:33,357 INFO L93 Difference]: Finished difference Result 103 states and 202 transitions. [2020-09-16 01:36:33,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 01:36:33,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-09-16 01:36:33,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:33,360 INFO L225 Difference]: With dead ends: 103 [2020-09-16 01:36:33,360 INFO L226 Difference]: Without dead ends: 103 [2020-09-16 01:36:33,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:36:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-16 01:36:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-09-16 01:36:33,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-16 01:36:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 202 transitions. [2020-09-16 01:36:33,375 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 202 transitions. Word has length 14 [2020-09-16 01:36:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:33,375 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 202 transitions. [2020-09-16 01:36:33,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-16 01:36:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 202 transitions. [2020-09-16 01:36:33,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 01:36:33,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:33,377 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:33,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-16 01:36:33,378 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:33,378 INFO L82 PathProgramCache]: Analyzing trace with hash -570543039, now seen corresponding path program 1 times [2020-09-16 01:36:33,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:33,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405512641] [2020-09-16 01:36:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-16 01:36:33,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405512641] [2020-09-16 01:36:33,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:36:33,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 01:36:33,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [531462894] [2020-09-16 01:36:33,485 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:33,489 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:33,515 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2020-09-16 01:36:33,516 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:33,542 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:36:33,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-16 01:36:33,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:33,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-16 01:36:33,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:36:33,544 INFO L87 Difference]: Start difference. First operand 103 states and 202 transitions. Second operand 3 states. [2020-09-16 01:36:33,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:33,562 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-09-16 01:36:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-16 01:36:33,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-16 01:36:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:33,564 INFO L225 Difference]: With dead ends: 79 [2020-09-16 01:36:33,564 INFO L226 Difference]: Without dead ends: 79 [2020-09-16 01:36:33,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:36:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-16 01:36:33,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-09-16 01:36:33,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-16 01:36:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-09-16 01:36:33,575 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 22 [2020-09-16 01:36:33,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:33,575 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-09-16 01:36:33,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-16 01:36:33,575 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-09-16 01:36:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 01:36:33,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:33,577 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:33,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-16 01:36:33,578 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:33,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:33,578 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 2 times [2020-09-16 01:36:33,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:33,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113250393] [2020-09-16 01:36:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:36:33,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113250393] [2020-09-16 01:36:33,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121431350] [2020-09-16 01:36:33,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:33,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 01:36:33,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:36:33,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-16 01:36:33,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:36:33,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:33,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-16 01:36:33,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1606571798] [2020-09-16 01:36:33,823 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:33,827 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:33,833 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 38 transitions. [2020-09-16 01:36:33,833 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:33,885 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [951#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-16 01:36:33,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-16 01:36:33,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:33,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-16 01:36:33,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-16 01:36:33,886 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 7 states. [2020-09-16 01:36:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:33,936 INFO L93 Difference]: Finished difference Result 127 states and 194 transitions. [2020-09-16 01:36:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-16 01:36:33,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-16 01:36:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:33,939 INFO L225 Difference]: With dead ends: 127 [2020-09-16 01:36:33,939 INFO L226 Difference]: Without dead ends: 127 [2020-09-16 01:36:33,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-16 01:36:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-16 01:36:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-09-16 01:36:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-16 01:36:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 194 transitions. [2020-09-16 01:36:33,953 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 194 transitions. Word has length 22 [2020-09-16 01:36:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:33,953 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 194 transitions. [2020-09-16 01:36:33,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-16 01:36:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 194 transitions. [2020-09-16 01:36:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-16 01:36:33,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:33,956 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:34,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:34,170 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:34,171 INFO L82 PathProgramCache]: Analyzing trace with hash 517535263, now seen corresponding path program 3 times [2020-09-16 01:36:34,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:34,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488275542] [2020-09-16 01:36:34,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-16 01:36:34,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488275542] [2020-09-16 01:36:34,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865637005] [2020-09-16 01:36:34,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:34,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 01:36:34,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:36:34,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-16 01:36:34,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-16 01:36:34,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:34,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-16 01:36:34,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1379684536] [2020-09-16 01:36:34,454 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:34,459 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:34,470 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 46 transitions. [2020-09-16 01:36:34,471 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:34,549 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1426#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 1427#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:36:34,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 01:36:34,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:34,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 01:36:34,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-16 01:36:34,550 INFO L87 Difference]: Start difference. First operand 127 states and 194 transitions. Second operand 8 states. [2020-09-16 01:36:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:34,598 INFO L93 Difference]: Finished difference Result 174 states and 256 transitions. [2020-09-16 01:36:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-16 01:36:34,598 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-09-16 01:36:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:34,600 INFO L225 Difference]: With dead ends: 174 [2020-09-16 01:36:34,600 INFO L226 Difference]: Without dead ends: 174 [2020-09-16 01:36:34,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-16 01:36:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-16 01:36:34,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 160. [2020-09-16 01:36:34,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-16 01:36:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-09-16 01:36:34,618 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 30 [2020-09-16 01:36:34,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:34,619 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-09-16 01:36:34,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 01:36:34,619 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-09-16 01:36:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-16 01:36:34,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:34,624 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:34,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:34,835 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:34,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:34,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 4 times [2020-09-16 01:36:34,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:34,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871895985] [2020-09-16 01:36:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-16 01:36:34,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871895985] [2020-09-16 01:36:34,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104544720] [2020-09-16 01:36:34,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:35,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 01:36:35,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:36:35,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-16 01:36:35,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-16 01:36:35,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:35,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 01:36:35,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1775777388] [2020-09-16 01:36:35,161 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:35,197 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:35,226 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 55 transitions. [2020-09-16 01:36:35,226 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:35,308 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2026#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-16 01:36:35,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 01:36:35,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:35,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 01:36:35,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-16 01:36:35,310 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 9 states. [2020-09-16 01:36:35,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:35,358 INFO L93 Difference]: Finished difference Result 220 states and 322 transitions. [2020-09-16 01:36:35,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 01:36:35,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-09-16 01:36:35,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:35,360 INFO L225 Difference]: With dead ends: 220 [2020-09-16 01:36:35,361 INFO L226 Difference]: Without dead ends: 220 [2020-09-16 01:36:35,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-16 01:36:35,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-16 01:36:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-09-16 01:36:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-09-16 01:36:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 322 transitions. [2020-09-16 01:36:35,386 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 322 transitions. Word has length 33 [2020-09-16 01:36:35,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:35,387 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 322 transitions. [2020-09-16 01:36:35,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 01:36:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 322 transitions. [2020-09-16 01:36:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-16 01:36:35,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:35,390 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:35,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:35,605 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:35,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1068728479, now seen corresponding path program 5 times [2020-09-16 01:36:35,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:35,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765613701] [2020-09-16 01:36:35,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-16 01:36:35,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765613701] [2020-09-16 01:36:35,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004419739] [2020-09-16 01:36:35,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:35,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-16 01:36:35,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:36:35,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 01:36:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-16 01:36:35,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:35,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 01:36:35,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [813687312] [2020-09-16 01:36:35,884 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:35,893 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:35,912 INFO L274 McrAutomatonBuilder]: Finished intersection with 53 states and 63 transitions. [2020-09-16 01:36:35,912 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:35,979 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2817#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-16 01:36:35,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 01:36:35,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:35,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 01:36:35,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-16 01:36:35,980 INFO L87 Difference]: Start difference. First operand 220 states and 322 transitions. Second operand 11 states. [2020-09-16 01:36:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:36,034 INFO L93 Difference]: Finished difference Result 280 states and 406 transitions. [2020-09-16 01:36:36,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 01:36:36,035 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-09-16 01:36:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:36,037 INFO L225 Difference]: With dead ends: 280 [2020-09-16 01:36:36,037 INFO L226 Difference]: Without dead ends: 280 [2020-09-16 01:36:36,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-16 01:36:36,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-16 01:36:36,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2020-09-16 01:36:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-09-16 01:36:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 406 transitions. [2020-09-16 01:36:36,049 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 406 transitions. Word has length 41 [2020-09-16 01:36:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:36,049 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 406 transitions. [2020-09-16 01:36:36,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 01:36:36,049 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 406 transitions. [2020-09-16 01:36:36,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-16 01:36:36,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:36,051 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:36,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:36,259 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:36,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2088433981, now seen corresponding path program 6 times [2020-09-16 01:36:36,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:36,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10052533] [2020-09-16 01:36:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-16 01:36:36,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10052533] [2020-09-16 01:36:36,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925290945] [2020-09-16 01:36:36,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:36,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-16 01:36:36,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:36:36,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-16 01:36:36,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-16 01:36:36,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:36,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-16 01:36:36,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [911806378] [2020-09-16 01:36:36,604 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:36,619 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:36,645 INFO L274 McrAutomatonBuilder]: Finished intersection with 61 states and 71 transitions. [2020-09-16 01:36:36,646 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:36,762 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [3809#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 3810#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:36:36,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 01:36:36,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:36,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 01:36:36,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-16 01:36:36,763 INFO L87 Difference]: Start difference. First operand 280 states and 406 transitions. Second operand 9 states. [2020-09-16 01:36:36,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:36,826 INFO L93 Difference]: Finished difference Result 359 states and 504 transitions. [2020-09-16 01:36:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 01:36:36,827 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-16 01:36:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:36,830 INFO L225 Difference]: With dead ends: 359 [2020-09-16 01:36:36,830 INFO L226 Difference]: Without dead ends: 359 [2020-09-16 01:36:36,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-16 01:36:36,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-09-16 01:36:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 337. [2020-09-16 01:36:36,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-09-16 01:36:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2020-09-16 01:36:36,843 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 49 [2020-09-16 01:36:36,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:36,844 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2020-09-16 01:36:36,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 01:36:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2020-09-16 01:36:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-16 01:36:36,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:36,846 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:37,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:37,060 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:37,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1332663897, now seen corresponding path program 7 times [2020-09-16 01:36:37,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:37,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014989802] [2020-09-16 01:36:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-16 01:36:37,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014989802] [2020-09-16 01:36:37,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223949134] [2020-09-16 01:36:37,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:37,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 01:36:37,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-16 01:36:37,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:37,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 01:36:37,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [299178362] [2020-09-16 01:36:37,418 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:37,436 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:37,475 INFO L274 McrAutomatonBuilder]: Finished intersection with 67 states and 80 transitions. [2020-09-16 01:36:37,475 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:37,639 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5009#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-16 01:36:37,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 01:36:37,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:37,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 01:36:37,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-16 01:36:37,641 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand 13 states. [2020-09-16 01:36:37,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:37,704 INFO L93 Difference]: Finished difference Result 409 states and 576 transitions. [2020-09-16 01:36:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 01:36:37,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-09-16 01:36:37,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:37,708 INFO L225 Difference]: With dead ends: 409 [2020-09-16 01:36:37,708 INFO L226 Difference]: Without dead ends: 409 [2020-09-16 01:36:37,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-16 01:36:37,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-09-16 01:36:37,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 409. [2020-09-16 01:36:37,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-09-16 01:36:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 576 transitions. [2020-09-16 01:36:37,721 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 576 transitions. Word has length 52 [2020-09-16 01:36:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:37,721 INFO L479 AbstractCegarLoop]: Abstraction has 409 states and 576 transitions. [2020-09-16 01:36:37,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 01:36:37,722 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 576 transitions. [2020-09-16 01:36:37,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-16 01:36:37,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:37,724 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:37,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:37,937 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:37,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:37,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1082708405, now seen corresponding path program 8 times [2020-09-16 01:36:37,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:37,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923474558] [2020-09-16 01:36:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-16 01:36:38,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923474558] [2020-09-16 01:36:38,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27011348] [2020-09-16 01:36:38,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:38,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 01:36:38,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:36:38,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 01:36:38,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-16 01:36:38,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:38,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-16 01:36:38,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1284224205] [2020-09-16 01:36:38,332 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:38,359 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:38,411 INFO L274 McrAutomatonBuilder]: Finished intersection with 75 states and 88 transitions. [2020-09-16 01:36:38,411 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:38,490 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6428#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-16 01:36:38,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 01:36:38,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:38,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 01:36:38,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-16 01:36:38,492 INFO L87 Difference]: Start difference. First operand 409 states and 576 transitions. Second operand 15 states. [2020-09-16 01:36:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:38,568 INFO L93 Difference]: Finished difference Result 481 states and 674 transitions. [2020-09-16 01:36:38,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 01:36:38,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-09-16 01:36:38,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:38,571 INFO L225 Difference]: With dead ends: 481 [2020-09-16 01:36:38,571 INFO L226 Difference]: Without dead ends: 481 [2020-09-16 01:36:38,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-16 01:36:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-09-16 01:36:38,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 481. [2020-09-16 01:36:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-09-16 01:36:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 674 transitions. [2020-09-16 01:36:38,583 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 674 transitions. Word has length 60 [2020-09-16 01:36:38,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:38,584 INFO L479 AbstractCegarLoop]: Abstraction has 481 states and 674 transitions. [2020-09-16 01:36:38,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 01:36:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 674 transitions. [2020-09-16 01:36:38,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-16 01:36:38,585 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:38,586 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:38,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-16 01:36:38,801 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:38,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1779413265, now seen corresponding path program 9 times [2020-09-16 01:36:38,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:38,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129912460] [2020-09-16 01:36:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 10 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-16 01:36:39,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129912460] [2020-09-16 01:36:39,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073388832] [2020-09-16 01:36:39,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:39,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-16 01:36:39,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:36:39,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-16 01:36:39,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-09-16 01:36:39,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:39,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2020-09-16 01:36:39,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [502906122] [2020-09-16 01:36:39,310 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:39,335 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:39,392 INFO L274 McrAutomatonBuilder]: Finished intersection with 83 states and 96 transitions. [2020-09-16 01:36:39,392 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:39,549 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [8093#(< thread_function_mutexThread1of1ForFork0_~i~0 20), 8094#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:36:39,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 01:36:39,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:39,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 01:36:39,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-09-16 01:36:39,550 INFO L87 Difference]: Start difference. First operand 481 states and 674 transitions. Second operand 22 states. [2020-09-16 01:36:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:42,589 INFO L93 Difference]: Finished difference Result 680 states and 924 transitions. [2020-09-16 01:36:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-09-16 01:36:42,590 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2020-09-16 01:36:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:42,594 INFO L225 Difference]: With dead ends: 680 [2020-09-16 01:36:42,594 INFO L226 Difference]: Without dead ends: 680 [2020-09-16 01:36:42,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3608 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2880, Invalid=8250, Unknown=0, NotChecked=0, Total=11130 [2020-09-16 01:36:42,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2020-09-16 01:36:42,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 646. [2020-09-16 01:36:42,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2020-09-16 01:36:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 886 transitions. [2020-09-16 01:36:42,616 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 886 transitions. Word has length 68 [2020-09-16 01:36:42,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:42,617 INFO L479 AbstractCegarLoop]: Abstraction has 646 states and 886 transitions. [2020-09-16 01:36:42,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 01:36:42,617 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 886 transitions. [2020-09-16 01:36:42,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-16 01:36:42,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:42,620 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:42,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-16 01:36:42,834 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:42,834 INFO L82 PathProgramCache]: Analyzing trace with hash 72445841, now seen corresponding path program 10 times [2020-09-16 01:36:42,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:42,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669129768] [2020-09-16 01:36:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 13 proven. 378 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-16 01:36:43,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669129768] [2020-09-16 01:36:43,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241999125] [2020-09-16 01:36:43,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:43,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 01:36:43,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:36:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 01:36:43,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 13 proven. 378 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-16 01:36:43,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:43,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-16 01:36:43,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1682482801] [2020-09-16 01:36:43,421 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:43,483 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:43,644 INFO L274 McrAutomatonBuilder]: Finished intersection with 97 states and 113 transitions. [2020-09-16 01:36:43,645 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:43,739 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10558#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-16 01:36:43,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 01:36:43,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:43,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 01:36:43,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-16 01:36:43,740 INFO L87 Difference]: Start difference. First operand 646 states and 886 transitions. Second operand 19 states. [2020-09-16 01:36:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:43,838 INFO L93 Difference]: Finished difference Result 730 states and 998 transitions. [2020-09-16 01:36:43,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 01:36:43,839 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-09-16 01:36:43,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:43,843 INFO L225 Difference]: With dead ends: 730 [2020-09-16 01:36:43,843 INFO L226 Difference]: Without dead ends: 730 [2020-09-16 01:36:43,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-16 01:36:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2020-09-16 01:36:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 730. [2020-09-16 01:36:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2020-09-16 01:36:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 998 transitions. [2020-09-16 01:36:43,857 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 998 transitions. Word has length 79 [2020-09-16 01:36:43,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:43,858 INFO L479 AbstractCegarLoop]: Abstraction has 730 states and 998 transitions. [2020-09-16 01:36:43,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 01:36:43,858 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 998 transitions. [2020-09-16 01:36:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-16 01:36:43,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:43,860 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:44,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:44,076 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:44,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:44,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1605477485, now seen corresponding path program 11 times [2020-09-16 01:36:44,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:44,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660590159] [2020-09-16 01:36:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 13 proven. 496 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-16 01:36:44,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660590159] [2020-09-16 01:36:44,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829894289] [2020-09-16 01:36:44,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:44,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-09-16 01:36:44,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:36:44,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 01:36:44,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 13 proven. 496 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-16 01:36:44,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:44,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-16 01:36:44,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [549578184] [2020-09-16 01:36:44,652 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:44,971 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:45,068 INFO L274 McrAutomatonBuilder]: Finished intersection with 105 states and 121 transitions. [2020-09-16 01:36:45,068 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:45,180 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13027#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-16 01:36:45,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 01:36:45,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:45,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 01:36:45,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-16 01:36:45,182 INFO L87 Difference]: Start difference. First operand 730 states and 998 transitions. Second operand 21 states. [2020-09-16 01:36:45,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:45,278 INFO L93 Difference]: Finished difference Result 814 states and 1110 transitions. [2020-09-16 01:36:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 01:36:45,278 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2020-09-16 01:36:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:45,282 INFO L225 Difference]: With dead ends: 814 [2020-09-16 01:36:45,283 INFO L226 Difference]: Without dead ends: 814 [2020-09-16 01:36:45,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-16 01:36:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-09-16 01:36:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2020-09-16 01:36:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2020-09-16 01:36:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1110 transitions. [2020-09-16 01:36:45,299 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1110 transitions. Word has length 87 [2020-09-16 01:36:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:45,299 INFO L479 AbstractCegarLoop]: Abstraction has 814 states and 1110 transitions. [2020-09-16 01:36:45,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 01:36:45,300 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1110 transitions. [2020-09-16 01:36:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-16 01:36:45,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:45,308 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:45,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:45,523 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:45,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:45,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1402127031, now seen corresponding path program 12 times [2020-09-16 01:36:45,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:45,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760962663] [2020-09-16 01:36:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 13 proven. 630 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-16 01:36:45,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760962663] [2020-09-16 01:36:45,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865575345] [2020-09-16 01:36:45,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:46,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-16 01:36:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:36:46,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 01:36:46,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-09-16 01:36:46,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:46,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2020-09-16 01:36:46,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [880352998] [2020-09-16 01:36:46,263 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:46,339 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:46,514 INFO L274 McrAutomatonBuilder]: Finished intersection with 113 states and 129 transitions. [2020-09-16 01:36:46,514 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:46,864 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [15779#(< thread_function_mutexThread1of1ForFork0_~i~0 20), 15780#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:36:46,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-16 01:36:46,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-16 01:36:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-09-16 01:36:46,865 INFO L87 Difference]: Start difference. First operand 814 states and 1110 transitions. Second operand 29 states. [2020-09-16 01:36:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:53,542 INFO L93 Difference]: Finished difference Result 1073 states and 1428 transitions. [2020-09-16 01:36:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-09-16 01:36:53,543 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2020-09-16 01:36:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:53,548 INFO L225 Difference]: With dead ends: 1073 [2020-09-16 01:36:53,548 INFO L226 Difference]: Without dead ends: 1073 [2020-09-16 01:36:53,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 239 SyntacticMatches, 4 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9948 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=7161, Invalid=21231, Unknown=0, NotChecked=0, Total=28392 [2020-09-16 01:36:53,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2020-09-16 01:36:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1027. [2020-09-16 01:36:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2020-09-16 01:36:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1378 transitions. [2020-09-16 01:36:53,574 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1378 transitions. Word has length 95 [2020-09-16 01:36:53,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:53,575 INFO L479 AbstractCegarLoop]: Abstraction has 1027 states and 1378 transitions. [2020-09-16 01:36:53,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-16 01:36:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1378 transitions. [2020-09-16 01:36:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-16 01:36:53,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:53,578 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:53,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-16 01:36:53,792 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:53,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1502437311, now seen corresponding path program 13 times [2020-09-16 01:36:53,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:53,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550035979] [2020-09-16 01:36:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:36:54,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550035979] [2020-09-16 01:36:54,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078063465] [2020-09-16 01:36:54,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 01:36:54,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:36:54,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:54,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 01:36:54,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2108822388] [2020-09-16 01:36:54,222 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:54,281 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:54,899 INFO L274 McrAutomatonBuilder]: Finished intersection with 127 states and 146 transitions. [2020-09-16 01:36:54,899 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:55,129 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [19634#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 19635#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:36:55,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 01:36:55,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:55,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 01:36:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2020-09-16 01:36:55,130 INFO L87 Difference]: Start difference. First operand 1027 states and 1378 transitions. Second operand 12 states. [2020-09-16 01:36:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:55,195 INFO L93 Difference]: Finished difference Result 1202 states and 1584 transitions. [2020-09-16 01:36:55,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 01:36:55,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 106 [2020-09-16 01:36:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:55,200 INFO L225 Difference]: With dead ends: 1202 [2020-09-16 01:36:55,200 INFO L226 Difference]: Without dead ends: 1202 [2020-09-16 01:36:55,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2020-09-16 01:36:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2020-09-16 01:36:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1156. [2020-09-16 01:36:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2020-09-16 01:36:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1534 transitions. [2020-09-16 01:36:55,220 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1534 transitions. Word has length 106 [2020-09-16 01:36:55,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:55,221 INFO L479 AbstractCegarLoop]: Abstraction has 1156 states and 1534 transitions. [2020-09-16 01:36:55,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 01:36:55,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1534 transitions. [2020-09-16 01:36:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-16 01:36:55,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:55,224 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:55,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-16 01:36:55,437 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:55,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:55,438 INFO L82 PathProgramCache]: Analyzing trace with hash 282598373, now seen corresponding path program 14 times [2020-09-16 01:36:55,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:55,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621360076] [2020-09-16 01:36:55,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:36:55,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621360076] [2020-09-16 01:36:55,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342717246] [2020-09-16 01:36:55,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:55,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 01:36:55,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:36:55,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 01:36:55,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:36:55,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:55,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 01:36:55,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [904366382] [2020-09-16 01:36:55,864 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:56,020 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:56,235 INFO L274 McrAutomatonBuilder]: Finished intersection with 133 states and 155 transitions. [2020-09-16 01:36:56,236 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:56,486 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [23485#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 23486#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:36:56,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 01:36:56,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:56,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 01:36:56,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-16 01:36:56,488 INFO L87 Difference]: Start difference. First operand 1156 states and 1534 transitions. Second operand 13 states. [2020-09-16 01:36:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:56,570 INFO L93 Difference]: Finished difference Result 1331 states and 1740 transitions. [2020-09-16 01:36:56,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 01:36:56,570 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 109 [2020-09-16 01:36:56,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:56,576 INFO L225 Difference]: With dead ends: 1331 [2020-09-16 01:36:56,576 INFO L226 Difference]: Without dead ends: 1331 [2020-09-16 01:36:56,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 141 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-16 01:36:56,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2020-09-16 01:36:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1285. [2020-09-16 01:36:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-09-16 01:36:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1690 transitions. [2020-09-16 01:36:56,620 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1690 transitions. Word has length 109 [2020-09-16 01:36:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:56,620 INFO L479 AbstractCegarLoop]: Abstraction has 1285 states and 1690 transitions. [2020-09-16 01:36:56,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 01:36:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1690 transitions. [2020-09-16 01:36:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-16 01:36:56,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:56,629 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:56,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-16 01:36:56,842 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:56,843 INFO L82 PathProgramCache]: Analyzing trace with hash -220912129, now seen corresponding path program 15 times [2020-09-16 01:36:56,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:56,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004833850] [2020-09-16 01:36:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:36:57,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004833850] [2020-09-16 01:36:57,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134493808] [2020-09-16 01:36:57,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:57,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-16 01:36:57,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:36:57,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 01:36:57,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:36:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:36:57,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:36:57,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 01:36:57,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1996778481] [2020-09-16 01:36:57,564 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:36:57,722 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:36:58,027 INFO L274 McrAutomatonBuilder]: Finished intersection with 139 states and 164 transitions. [2020-09-16 01:36:58,027 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:36:58,399 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [27733#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 27734#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:36:58,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 01:36:58,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:36:58,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 01:36:58,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2020-09-16 01:36:58,402 INFO L87 Difference]: Start difference. First operand 1285 states and 1690 transitions. Second operand 14 states. [2020-09-16 01:36:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:36:58,506 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-09-16 01:36:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 01:36:58,507 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 112 [2020-09-16 01:36:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:36:58,513 INFO L225 Difference]: With dead ends: 1460 [2020-09-16 01:36:58,514 INFO L226 Difference]: Without dead ends: 1460 [2020-09-16 01:36:58,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 148 SyntacticMatches, 14 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2020-09-16 01:36:58,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-09-16 01:36:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-09-16 01:36:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-09-16 01:36:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-09-16 01:36:58,545 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 112 [2020-09-16 01:36:58,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:36:58,545 INFO L479 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-09-16 01:36:58,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 01:36:58,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-09-16 01:36:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-16 01:36:58,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:36:58,549 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:36:58,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:36:58,762 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:36:58,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:36:58,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 16 times [2020-09-16 01:36:58,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:36:58,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009988383] [2020-09-16 01:36:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:36:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:36:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:36:59,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009988383] [2020-09-16 01:36:59,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121119474] [2020-09-16 01:36:59,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:00,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 01:37:00,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:37:00,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 01:37:00,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:37:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:00,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:37:00,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-16 01:37:00,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [20151227] [2020-09-16 01:37:00,184 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:37:00,232 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:37:00,500 INFO L274 McrAutomatonBuilder]: Finished intersection with 145 states and 173 transitions. [2020-09-16 01:37:00,501 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:37:00,932 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [32378#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 32379#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:37:00,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 01:37:00,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:37:00,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 01:37:00,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2020-09-16 01:37:00,934 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 15 states. [2020-09-16 01:37:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:37:01,035 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-09-16 01:37:01,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 01:37:01,036 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 115 [2020-09-16 01:37:01,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:37:01,045 INFO L225 Difference]: With dead ends: 1589 [2020-09-16 01:37:01,045 INFO L226 Difference]: Without dead ends: 1589 [2020-09-16 01:37:01,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 16 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2020-09-16 01:37:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-09-16 01:37:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-09-16 01:37:01,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-16 01:37:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-09-16 01:37:01,088 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-09-16 01:37:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:37:01,089 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-09-16 01:37:01,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 01:37:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-09-16 01:37:01,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-16 01:37:01,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:37:01,096 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:37:01,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-16 01:37:01,311 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:37:01,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:37:01,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 17 times [2020-09-16 01:37:01,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:37:01,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499642727] [2020-09-16 01:37:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:37:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:37:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:01,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499642727] [2020-09-16 01:37:01,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094710870] [2020-09-16 01:37:01,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:01,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-16 01:37:01,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:37:01,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 01:37:01,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:37:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:02,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:37:02,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-16 01:37:02,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [134930090] [2020-09-16 01:37:02,035 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:37:02,079 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:37:02,417 INFO L274 McrAutomatonBuilder]: Finished intersection with 151 states and 182 transitions. [2020-09-16 01:37:02,418 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:37:02,766 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [37420#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 37421#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:37:02,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 01:37:02,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:37:02,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 01:37:02,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-09-16 01:37:02,767 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 16 states. [2020-09-16 01:37:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:37:02,886 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-09-16 01:37:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 01:37:02,887 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 118 [2020-09-16 01:37:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:37:02,892 INFO L225 Difference]: With dead ends: 1718 [2020-09-16 01:37:02,892 INFO L226 Difference]: Without dead ends: 1718 [2020-09-16 01:37:02,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 18 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-09-16 01:37:02,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-09-16 01:37:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-09-16 01:37:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-09-16 01:37:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-09-16 01:37:02,988 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-09-16 01:37:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:37:02,988 INFO L479 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-09-16 01:37:02,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 01:37:02,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-09-16 01:37:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-16 01:37:02,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:37:02,993 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:37:03,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:03,210 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:37:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:37:03,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 18 times [2020-09-16 01:37:03,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:37:03,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448911498] [2020-09-16 01:37:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:37:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:37:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:03,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448911498] [2020-09-16 01:37:03,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133934792] [2020-09-16 01:37:03,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:04,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-09-16 01:37:04,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:37:04,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 01:37:04,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:37:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:04,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:37:04,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-16 01:37:04,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1855411595] [2020-09-16 01:37:04,103 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:37:04,135 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:37:04,395 INFO L274 McrAutomatonBuilder]: Finished intersection with 157 states and 191 transitions. [2020-09-16 01:37:04,396 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:37:04,865 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [42859#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 42860#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:37:04,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 01:37:04,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:37:04,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 01:37:04,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2020-09-16 01:37:04,866 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 17 states. [2020-09-16 01:37:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:37:04,962 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-09-16 01:37:04,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 01:37:04,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2020-09-16 01:37:04,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:37:04,973 INFO L225 Difference]: With dead ends: 1847 [2020-09-16 01:37:04,973 INFO L226 Difference]: Without dead ends: 1847 [2020-09-16 01:37:04,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 169 SyntacticMatches, 20 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2020-09-16 01:37:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-09-16 01:37:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-09-16 01:37:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-09-16 01:37:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-09-16 01:37:05,067 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-09-16 01:37:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:37:05,068 INFO L479 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-09-16 01:37:05,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 01:37:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-09-16 01:37:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-16 01:37:05,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:37:05,074 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:37:05,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:05,289 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:37:05,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:37:05,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 19 times [2020-09-16 01:37:05,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:37:05,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820843648] [2020-09-16 01:37:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:37:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:37:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:05,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820843648] [2020-09-16 01:37:05,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630879024] [2020-09-16 01:37:05,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:37:05,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 01:37:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:37:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:05,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:37:05,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-16 01:37:05,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [484038495] [2020-09-16 01:37:05,837 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:37:05,887 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:37:06,256 INFO L274 McrAutomatonBuilder]: Finished intersection with 163 states and 200 transitions. [2020-09-16 01:37:06,256 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:37:07,394 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [48695#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 48696#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:37:07,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 01:37:07,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:37:07,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 01:37:07,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2020-09-16 01:37:07,396 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 18 states. [2020-09-16 01:37:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:37:07,496 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-09-16 01:37:07,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 01:37:07,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 124 [2020-09-16 01:37:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:37:07,502 INFO L225 Difference]: With dead ends: 1976 [2020-09-16 01:37:07,502 INFO L226 Difference]: Without dead ends: 1976 [2020-09-16 01:37:07,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 176 SyntacticMatches, 22 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2020-09-16 01:37:07,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-09-16 01:37:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-09-16 01:37:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-09-16 01:37:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-09-16 01:37:07,530 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-09-16 01:37:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:37:07,531 INFO L479 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-09-16 01:37:07,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 01:37:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-09-16 01:37:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-16 01:37:07,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:37:07,536 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:37:07,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-16 01:37:07,749 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:37:07,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:37:07,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 20 times [2020-09-16 01:37:07,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:37:07,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373278027] [2020-09-16 01:37:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:37:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:37:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:08,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373278027] [2020-09-16 01:37:08,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873270293] [2020-09-16 01:37:08,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:08,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 01:37:08,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:37:08,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 01:37:08,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:37:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:08,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:37:08,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-16 01:37:08,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [160122037] [2020-09-16 01:37:08,293 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:37:08,350 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:37:08,823 INFO L274 McrAutomatonBuilder]: Finished intersection with 169 states and 209 transitions. [2020-09-16 01:37:08,824 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:37:09,400 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [54928#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 54929#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:37:09,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 01:37:09,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:37:09,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 01:37:09,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2020-09-16 01:37:09,401 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 19 states. [2020-09-16 01:37:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:37:09,526 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-09-16 01:37:09,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 01:37:09,526 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 127 [2020-09-16 01:37:09,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:37:09,532 INFO L225 Difference]: With dead ends: 2105 [2020-09-16 01:37:09,532 INFO L226 Difference]: Without dead ends: 2105 [2020-09-16 01:37:09,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 183 SyntacticMatches, 24 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2020-09-16 01:37:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-09-16 01:37:09,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-09-16 01:37:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-09-16 01:37:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-09-16 01:37:09,576 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-09-16 01:37:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:37:09,577 INFO L479 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-09-16 01:37:09,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 01:37:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-09-16 01:37:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-16 01:37:09,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:37:09,588 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:37:09,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:09,804 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:37:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:37:09,805 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 21 times [2020-09-16 01:37:09,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:37:09,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29107924] [2020-09-16 01:37:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:37:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:37:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:10,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29107924] [2020-09-16 01:37:10,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397026334] [2020-09-16 01:37:10,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:10,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-16 01:37:10,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:37:10,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 01:37:10,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:37:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:10,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:37:10,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-16 01:37:10,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [177384504] [2020-09-16 01:37:10,554 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:37:10,625 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:37:11,674 INFO L274 McrAutomatonBuilder]: Finished intersection with 175 states and 218 transitions. [2020-09-16 01:37:11,675 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:37:12,326 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [61558#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 61559#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:37:12,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 01:37:12,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:37:12,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 01:37:12,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=219, Unknown=0, NotChecked=0, Total=380 [2020-09-16 01:37:12,327 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 20 states. [2020-09-16 01:37:12,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:37:12,465 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-09-16 01:37:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 01:37:12,465 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 130 [2020-09-16 01:37:12,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:37:12,473 INFO L225 Difference]: With dead ends: 2234 [2020-09-16 01:37:12,473 INFO L226 Difference]: Without dead ends: 2234 [2020-09-16 01:37:12,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 190 SyntacticMatches, 26 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=219, Unknown=0, NotChecked=0, Total=380 [2020-09-16 01:37:12,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-09-16 01:37:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-09-16 01:37:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-09-16 01:37:12,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-09-16 01:37:12,497 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-09-16 01:37:12,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:37:12,498 INFO L479 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-09-16 01:37:12,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 01:37:12,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-09-16 01:37:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-16 01:37:12,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:37:12,501 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:37:12,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-16 01:37:12,702 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:37:12,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:37:12,703 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 22 times [2020-09-16 01:37:12,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:37:12,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927903150] [2020-09-16 01:37:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:37:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:37:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:13,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927903150] [2020-09-16 01:37:13,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537278130] [2020-09-16 01:37:13,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:15,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 01:37:15,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:37:15,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 01:37:15,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:37:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:15,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:37:15,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-16 01:37:15,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1472217204] [2020-09-16 01:37:15,718 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:37:15,753 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:37:16,246 INFO L274 McrAutomatonBuilder]: Finished intersection with 181 states and 227 transitions. [2020-09-16 01:37:16,247 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:37:16,946 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [68585#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 68586#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:37:16,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 01:37:16,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:37:16,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 01:37:16,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=241, Unknown=0, NotChecked=0, Total=420 [2020-09-16 01:37:16,947 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 21 states. [2020-09-16 01:37:17,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:37:17,081 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-09-16 01:37:17,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 01:37:17,081 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 133 [2020-09-16 01:37:17,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:37:17,088 INFO L225 Difference]: With dead ends: 2363 [2020-09-16 01:37:17,088 INFO L226 Difference]: Without dead ends: 2363 [2020-09-16 01:37:17,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 197 SyntacticMatches, 28 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=241, Unknown=0, NotChecked=0, Total=420 [2020-09-16 01:37:17,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-09-16 01:37:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-09-16 01:37:17,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-09-16 01:37:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-09-16 01:37:17,118 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-09-16 01:37:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:37:17,118 INFO L479 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-09-16 01:37:17,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 01:37:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-09-16 01:37:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-16 01:37:17,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:37:17,123 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:37:17,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-16 01:37:17,339 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:37:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:37:17,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 23 times [2020-09-16 01:37:17,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:37:17,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987855543] [2020-09-16 01:37:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:37:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:37:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:17,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987855543] [2020-09-16 01:37:17,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486563631] [2020-09-16 01:37:17,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:18,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-16 01:37:18,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:37:18,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 01:37:18,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:37:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:18,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:37:18,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-16 01:37:18,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [932046459] [2020-09-16 01:37:18,471 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:37:18,533 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:37:19,122 INFO L274 McrAutomatonBuilder]: Finished intersection with 187 states and 236 transitions. [2020-09-16 01:37:19,122 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:37:19,895 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [76009#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 76010#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:37:19,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 01:37:19,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:37:19,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 01:37:19,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2020-09-16 01:37:19,897 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 22 states. [2020-09-16 01:37:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:37:20,017 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-09-16 01:37:20,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 01:37:20,017 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 136 [2020-09-16 01:37:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:37:20,025 INFO L225 Difference]: With dead ends: 2492 [2020-09-16 01:37:20,026 INFO L226 Difference]: Without dead ends: 2492 [2020-09-16 01:37:20,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 204 SyntacticMatches, 30 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2020-09-16 01:37:20,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-09-16 01:37:20,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-09-16 01:37:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-09-16 01:37:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-09-16 01:37:20,060 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-09-16 01:37:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:37:20,061 INFO L479 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-09-16 01:37:20,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 01:37:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-09-16 01:37:20,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-16 01:37:20,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:37:20,066 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:37:20,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:20,280 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:37:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:37:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 24 times [2020-09-16 01:37:20,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:37:20,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817994028] [2020-09-16 01:37:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:37:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:37:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:20,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817994028] [2020-09-16 01:37:20,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285257528] [2020-09-16 01:37:20,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:21,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-16 01:37:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:37:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 01:37:21,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:37:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:21,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:37:21,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-16 01:37:21,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [530002669] [2020-09-16 01:37:21,497 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:37:21,549 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:37:22,090 INFO L274 McrAutomatonBuilder]: Finished intersection with 193 states and 245 transitions. [2020-09-16 01:37:22,090 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:37:22,934 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [83831#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0)), 83830#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-09-16 01:37:22,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 01:37:22,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:37:22,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 01:37:22,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=288, Unknown=0, NotChecked=0, Total=506 [2020-09-16 01:37:22,935 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 23 states. [2020-09-16 01:37:23,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:37:23,072 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-09-16 01:37:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 01:37:23,072 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2020-09-16 01:37:23,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:37:23,083 INFO L225 Difference]: With dead ends: 2621 [2020-09-16 01:37:23,083 INFO L226 Difference]: Without dead ends: 2621 [2020-09-16 01:37:23,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 211 SyntacticMatches, 32 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=288, Unknown=0, NotChecked=0, Total=506 [2020-09-16 01:37:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-09-16 01:37:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-09-16 01:37:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-09-16 01:37:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-09-16 01:37:23,112 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-09-16 01:37:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:37:23,113 INFO L479 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-09-16 01:37:23,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 01:37:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-09-16 01:37:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-16 01:37:23,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:37:23,118 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:37:23,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-16 01:37:23,332 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:37:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:37:23,332 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 25 times [2020-09-16 01:37:23,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:37:23,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127559288] [2020-09-16 01:37:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:37:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:37:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:23,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127559288] [2020-09-16 01:37:23,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075546826] [2020-09-16 01:37:23,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:37:24,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 01:37:24,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:37:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:24,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:37:24,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-16 01:37:24,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [917994434] [2020-09-16 01:37:24,074 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:37:24,172 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:37:24,893 INFO L274 McrAutomatonBuilder]: Finished intersection with 199 states and 254 transitions. [2020-09-16 01:37:24,893 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:37:25,793 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [92049#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0)), 92048#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-09-16 01:37:25,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 01:37:25,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:37:25,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 01:37:25,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=313, Unknown=0, NotChecked=0, Total=552 [2020-09-16 01:37:25,794 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 24 states. [2020-09-16 01:37:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:37:25,912 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-09-16 01:37:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 01:37:25,913 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 142 [2020-09-16 01:37:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:37:25,919 INFO L225 Difference]: With dead ends: 2750 [2020-09-16 01:37:25,920 INFO L226 Difference]: Without dead ends: 2750 [2020-09-16 01:37:25,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 218 SyntacticMatches, 34 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=313, Unknown=0, NotChecked=0, Total=552 [2020-09-16 01:37:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-09-16 01:37:25,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-09-16 01:37:25,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-09-16 01:37:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-09-16 01:37:25,948 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-09-16 01:37:25,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:37:25,949 INFO L479 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-09-16 01:37:25,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 01:37:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-09-16 01:37:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-16 01:37:25,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:37:25,954 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:37:26,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:26,165 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:37:26,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:37:26,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 26 times [2020-09-16 01:37:26,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:37:26,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984835048] [2020-09-16 01:37:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:37:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:37:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:26,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984835048] [2020-09-16 01:37:26,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819443947] [2020-09-16 01:37:26,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:26,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 01:37:26,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:37:26,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 01:37:26,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:37:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-16 01:37:26,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:37:26,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-16 01:37:26,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1877416753] [2020-09-16 01:37:26,964 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:37:27,033 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:37:27,678 INFO L274 McrAutomatonBuilder]: Finished intersection with 205 states and 263 transitions. [2020-09-16 01:37:27,679 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:37:28,703 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [100663#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 100664#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-16 01:37:28,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-16 01:37:28,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:37:28,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-16 01:37:28,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=339, Unknown=0, NotChecked=0, Total=600 [2020-09-16 01:37:28,704 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 25 states. [2020-09-16 01:37:28,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:37:28,830 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-09-16 01:37:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 01:37:28,831 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 145 [2020-09-16 01:37:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:37:28,836 INFO L225 Difference]: With dead ends: 2833 [2020-09-16 01:37:28,836 INFO L226 Difference]: Without dead ends: 2833 [2020-09-16 01:37:28,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 225 SyntacticMatches, 36 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=339, Unknown=0, NotChecked=0, Total=600 [2020-09-16 01:37:28,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-09-16 01:37:28,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-09-16 01:37:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-09-16 01:37:28,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-09-16 01:37:28,865 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-09-16 01:37:28,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:37:28,866 INFO L479 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-09-16 01:37:28,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-16 01:37:28,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-09-16 01:37:28,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-16 01:37:28,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:37:28,869 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:37:29,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-16 01:37:29,070 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:37:29,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:37:29,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 27 times [2020-09-16 01:37:29,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:37:29,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309300172] [2020-09-16 01:37:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:37:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:37:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:37:32,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309300172] [2020-09-16 01:37:32,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945894558] [2020-09-16 01:37:32,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:37:33,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-09-16 01:37:33,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:37:33,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-16 01:37:33,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:37:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:37:33,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:37:33,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-16 01:37:33,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1151957248] [2020-09-16 01:37:33,331 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:37:33,393 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:37:33,895 INFO L274 McrAutomatonBuilder]: Finished intersection with 211 states and 272 transitions. [2020-09-16 01:37:33,895 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:37:34,474 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:37:34,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-16 01:37:34,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:37:34,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-16 01:37:34,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-16 01:37:34,475 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-09-16 01:39:11,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:39:11,640 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-09-16 01:39:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-09-16 01:39:11,641 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-16 01:39:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:39:11,712 INFO L225 Difference]: With dead ends: 32926 [2020-09-16 01:39:11,712 INFO L226 Difference]: Without dead ends: 32924 [2020-09-16 01:39:11,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 265 SyntacticMatches, 6 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-09-16 01:39:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-09-16 01:39:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-09-16 01:39:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-09-16 01:39:11,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-09-16 01:39:11,982 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-09-16 01:39:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:39:11,982 INFO L479 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-09-16 01:39:11,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-16 01:39:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-09-16 01:39:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-16 01:39:11,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:39:11,988 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:39:12,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-16 01:39:12,202 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:39:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:39:12,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 28 times [2020-09-16 01:39:12,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:39:12,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828338919] [2020-09-16 01:39:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:39:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:39:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:39:15,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828338919] [2020-09-16 01:39:15,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333334956] [2020-09-16 01:39:15,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:39:18,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 01:39:18,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:39:18,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-16 01:39:18,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:39:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:39:18,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:39:18,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-16 01:39:18,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2047055831] [2020-09-16 01:39:18,286 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:39:18,332 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:39:19,052 INFO L274 McrAutomatonBuilder]: Finished intersection with 208 states and 266 transitions. [2020-09-16 01:39:19,053 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:39:19,629 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:39:19,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-16 01:39:19,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:39:19,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-16 01:39:19,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-16 01:39:19,630 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. [2020-09-16 01:41:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:41:01,695 INFO L93 Difference]: Finished difference Result 30945 states and 43173 transitions. [2020-09-16 01:41:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-16 01:41:01,696 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-16 01:41:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:41:01,738 INFO L225 Difference]: With dead ends: 30945 [2020-09-16 01:41:01,739 INFO L226 Difference]: Without dead ends: 30943 [2020-09-16 01:41:01,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 259 SyntacticMatches, 6 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-16 01:41:01,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30943 states. [2020-09-16 01:41:02,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30943 to 2973. [2020-09-16 01:41:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-09-16 01:41:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3801 transitions. [2020-09-16 01:41:02,152 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3801 transitions. Word has length 148 [2020-09-16 01:41:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:41:02,152 INFO L479 AbstractCegarLoop]: Abstraction has 2973 states and 3801 transitions. [2020-09-16 01:41:02,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-16 01:41:02,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3801 transitions. [2020-09-16 01:41:02,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-16 01:41:02,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:41:02,158 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:41:02,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:41:02,372 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:41:02,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:41:02,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1092472257, now seen corresponding path program 29 times [2020-09-16 01:41:02,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:41:02,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060978322] [2020-09-16 01:41:02,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:41:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:41:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:41:06,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060978322] [2020-09-16 01:41:06,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656143861] [2020-09-16 01:41:06,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:41:06,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-16 01:41:06,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:41:06,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-16 01:41:06,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:41:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:41:07,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:41:07,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-16 01:41:07,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1120796986] [2020-09-16 01:41:07,073 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:41:07,147 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:41:07,677 INFO L274 McrAutomatonBuilder]: Finished intersection with 205 states and 260 transitions. [2020-09-16 01:41:07,677 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:41:08,302 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:41:08,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-16 01:41:08,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:41:08,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-16 01:41:08,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-16 01:41:08,303 INFO L87 Difference]: Start difference. First operand 2973 states and 3801 transitions. Second operand 63 states. [2020-09-16 01:42:37,262 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-09-16 01:43:01,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:43:01,021 INFO L93 Difference]: Finished difference Result 30939 states and 43164 transitions. [2020-09-16 01:43:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-16 01:43:01,023 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-16 01:43:01,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:43:01,068 INFO L225 Difference]: With dead ends: 30939 [2020-09-16 01:43:01,068 INFO L226 Difference]: Without dead ends: 30937 [2020-09-16 01:43:01,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 253 SyntacticMatches, 6 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-16 01:43:01,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30937 states. [2020-09-16 01:43:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30937 to 2979. [2020-09-16 01:43:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2979 states. [2020-09-16 01:43:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 3808 transitions. [2020-09-16 01:43:01,452 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 3808 transitions. Word has length 148 [2020-09-16 01:43:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:43:01,453 INFO L479 AbstractCegarLoop]: Abstraction has 2979 states and 3808 transitions. [2020-09-16 01:43:01,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-16 01:43:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 3808 transitions. [2020-09-16 01:43:01,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-16 01:43:01,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:43:01,459 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:43:01,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:43:01,675 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:43:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:43:01,676 INFO L82 PathProgramCache]: Analyzing trace with hash 769524141, now seen corresponding path program 30 times [2020-09-16 01:43:01,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:43:01,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928209081] [2020-09-16 01:43:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:43:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:43:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:43:06,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928209081] [2020-09-16 01:43:06,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357760462] [2020-09-16 01:43:06,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:43:07,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-16 01:43:07,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:43:07,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-16 01:43:07,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:43:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:43:07,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:43:07,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-16 01:43:07,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1572097336] [2020-09-16 01:43:07,607 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:43:07,653 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:43:08,190 INFO L274 McrAutomatonBuilder]: Finished intersection with 202 states and 254 transitions. [2020-09-16 01:43:08,190 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:43:08,913 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:43:08,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-16 01:43:08,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:43:08,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-16 01:43:08,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-16 01:43:08,915 INFO L87 Difference]: Start difference. First operand 2979 states and 3808 transitions. Second operand 63 states. [2020-09-16 01:45:21,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:45:21,352 INFO L93 Difference]: Finished difference Result 30933 states and 43155 transitions. [2020-09-16 01:45:21,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-16 01:45:21,354 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-16 01:45:21,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:45:21,385 INFO L225 Difference]: With dead ends: 30933 [2020-09-16 01:45:21,385 INFO L226 Difference]: Without dead ends: 30931 [2020-09-16 01:45:21,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 865 GetRequests, 247 SyntacticMatches, 6 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 51.7s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-16 01:45:21,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30931 states. [2020-09-16 01:45:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30931 to 2985. [2020-09-16 01:45:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-09-16 01:45:21,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 3815 transitions. [2020-09-16 01:45:21,581 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 3815 transitions. Word has length 148 [2020-09-16 01:45:21,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:45:21,582 INFO L479 AbstractCegarLoop]: Abstraction has 2985 states and 3815 transitions. [2020-09-16 01:45:21,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-16 01:45:21,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 3815 transitions. [2020-09-16 01:45:21,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-16 01:45:21,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:45:21,587 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:45:21,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-16 01:45:21,802 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:45:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:45:21,803 INFO L82 PathProgramCache]: Analyzing trace with hash -188999425, now seen corresponding path program 31 times [2020-09-16 01:45:21,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:45:21,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752856922] [2020-09-16 01:45:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:45:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:45:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:45:26,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752856922] [2020-09-16 01:45:26,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477362806] [2020-09-16 01:45:26,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:45:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:45:26,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-16 01:45:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:45:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:45:26,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:45:26,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-16 01:45:26,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [341339355] [2020-09-16 01:45:26,963 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:45:27,157 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:45:27,637 INFO L274 McrAutomatonBuilder]: Finished intersection with 199 states and 248 transitions. [2020-09-16 01:45:27,637 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:45:28,297 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:45:28,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-16 01:45:28,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:45:28,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-16 01:45:28,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-16 01:45:28,298 INFO L87 Difference]: Start difference. First operand 2985 states and 3815 transitions. Second operand 63 states. [2020-09-16 01:47:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:47:33,581 INFO L93 Difference]: Finished difference Result 30927 states and 43146 transitions. [2020-09-16 01:47:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-09-16 01:47:33,583 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-16 01:47:33,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:47:33,608 INFO L225 Difference]: With dead ends: 30927 [2020-09-16 01:47:33,608 INFO L226 Difference]: Without dead ends: 30925 [2020-09-16 01:47:33,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 859 GetRequests, 241 SyntacticMatches, 6 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 49.1s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-09-16 01:47:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30925 states. [2020-09-16 01:47:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30925 to 2991. [2020-09-16 01:47:33,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2991 states. [2020-09-16 01:47:33,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 3822 transitions. [2020-09-16 01:47:33,734 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 3822 transitions. Word has length 148 [2020-09-16 01:47:33,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:47:33,734 INFO L479 AbstractCegarLoop]: Abstraction has 2991 states and 3822 transitions. [2020-09-16 01:47:33,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-16 01:47:33,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 3822 transitions. [2020-09-16 01:47:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-16 01:47:33,739 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:47:33,739 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:47:33,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:47:33,946 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:47:33,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:47:33,946 INFO L82 PathProgramCache]: Analyzing trace with hash 48993005, now seen corresponding path program 32 times [2020-09-16 01:47:33,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:47:33,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423489516] [2020-09-16 01:47:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:47:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:47:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:47:39,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423489516] [2020-09-16 01:47:39,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976898248] [2020-09-16 01:47:39,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:47:39,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 01:47:39,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:47:39,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-16 01:47:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:47:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:47:39,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:47:39,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-16 01:47:39,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1302523092] [2020-09-16 01:47:39,565 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:47:39,610 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:47:41,257 INFO L274 McrAutomatonBuilder]: Finished intersection with 196 states and 242 transitions. [2020-09-16 01:47:41,257 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:47:41,976 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:47:41,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-16 01:47:41,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:47:41,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-16 01:47:41,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-16 01:47:41,978 INFO L87 Difference]: Start difference. First operand 2991 states and 3822 transitions. Second operand 63 states.