/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-26 20:50:50,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-26 20:50:50,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-26 20:50:50,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-26 20:50:50,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-26 20:50:50,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-26 20:50:50,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-26 20:50:50,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-26 20:50:50,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-26 20:50:50,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-26 20:50:50,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-26 20:50:50,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-26 20:50:50,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-26 20:50:50,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-26 20:50:50,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-26 20:50:50,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-26 20:50:50,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-26 20:50:50,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-26 20:50:50,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-26 20:50:50,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-26 20:50:50,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-26 20:50:50,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-26 20:50:50,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-26 20:50:50,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-26 20:50:50,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-26 20:50:50,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-26 20:50:50,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-26 20:50:50,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-26 20:50:50,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-26 20:50:50,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-26 20:50:50,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-26 20:50:50,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-26 20:50:50,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-26 20:50:50,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-26 20:50:50,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-26 20:50:50,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-26 20:50:50,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-26 20:50:50,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-26 20:50:50,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-26 20:50:50,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-26 20:50:50,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-26 20:50:50,508 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-26 20:50:50,537 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-26 20:50:50,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-26 20:50:50,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-26 20:50:50,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-26 20:50:50,544 INFO L138 SettingsManager]: * Use SBE=true [2019-12-26 20:50:50,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-26 20:50:50,545 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-26 20:50:50,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-26 20:50:50,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-26 20:50:50,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-26 20:50:50,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-26 20:50:50,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-26 20:50:50,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-26 20:50:50,546 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-26 20:50:50,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-26 20:50:50,546 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-26 20:50:50,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-26 20:50:50,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-26 20:50:50,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-26 20:50:50,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-26 20:50:50,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-26 20:50:50,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-26 20:50:50,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-26 20:50:50,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-26 20:50:50,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-26 20:50:50,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-26 20:50:50,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-26 20:50:50,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-26 20:50:50,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-26 20:50:50,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-26 20:50:50,804 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-26 20:50:50,822 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-26 20:50:50,826 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-26 20:50:50,827 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-26 20:50:50,827 INFO L275 PluginConnector]: CDTParser initialized [2019-12-26 20:50:50,828 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2019-12-26 20:50:50,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a530052a/612bca1c474046d89756c77b6edcb5d8/FLAGace5cf828 [2019-12-26 20:50:51,402 INFO L306 CDTParser]: Found 1 translation units. [2019-12-26 20:50:51,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2019-12-26 20:50:51,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a530052a/612bca1c474046d89756c77b6edcb5d8/FLAGace5cf828 [2019-12-26 20:50:51,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a530052a/612bca1c474046d89756c77b6edcb5d8 [2019-12-26 20:50:51,738 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-26 20:50:51,740 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-26 20:50:51,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-26 20:50:51,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-26 20:50:51,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-26 20:50:51,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:50:51" (1/1) ... [2019-12-26 20:50:51,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75cdc2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:51, skipping insertion in model container [2019-12-26 20:50:51,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:50:51" (1/1) ... [2019-12-26 20:50:51,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-26 20:50:51,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-26 20:50:52,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:50:52,277 INFO L203 MainTranslator]: Completed pre-run [2019-12-26 20:50:52,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:50:52,387 INFO L208 MainTranslator]: Completed translation [2019-12-26 20:50:52,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:52 WrapperNode [2019-12-26 20:50:52,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-26 20:50:52,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-26 20:50:52,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-26 20:50:52,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-26 20:50:52,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:52" (1/1) ... [2019-12-26 20:50:52,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:52" (1/1) ... [2019-12-26 20:50:52,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-26 20:50:52,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-26 20:50:52,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-26 20:50:52,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-26 20:50:52,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:52" (1/1) ... [2019-12-26 20:50:52,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:52" (1/1) ... [2019-12-26 20:50:52,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:52" (1/1) ... [2019-12-26 20:50:52,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:52" (1/1) ... [2019-12-26 20:50:52,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:52" (1/1) ... [2019-12-26 20:50:52,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:52" (1/1) ... [2019-12-26 20:50:52,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:52" (1/1) ... [2019-12-26 20:50:52,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-26 20:50:52,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-26 20:50:52,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-26 20:50:52,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-26 20:50:52,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-26 20:50:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-26 20:50:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-26 20:50:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-26 20:50:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-26 20:50:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-26 20:50:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-26 20:50:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-26 20:50:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-26 20:50:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-26 20:50:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-26 20:50:52,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-26 20:50:52,555 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-26 20:50:52,913 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-26 20:50:52,914 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-26 20:50:52,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:50:52 BoogieIcfgContainer [2019-12-26 20:50:52,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-26 20:50:52,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-26 20:50:52,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-26 20:50:52,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-26 20:50:52,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.12 08:50:51" (1/3) ... [2019-12-26 20:50:52,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8d646d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:50:52, skipping insertion in model container [2019-12-26 20:50:52,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:52" (2/3) ... [2019-12-26 20:50:52,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8d646d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:50:52, skipping insertion in model container [2019-12-26 20:50:52,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:50:52" (3/3) ... [2019-12-26 20:50:52,924 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2019-12-26 20:50:52,934 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-26 20:50:52,935 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-26 20:50:52,941 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-26 20:50:52,942 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-26 20:50:52,966 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,966 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,966 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,967 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,967 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,968 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,968 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,968 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,968 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,969 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,969 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,969 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,970 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,970 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,970 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,971 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,971 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,971 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,971 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,972 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,972 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,972 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,973 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,973 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,973 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,974 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,974 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,974 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,978 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,979 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,979 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,979 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,979 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,980 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,985 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,985 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,986 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,986 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,986 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:52,986 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:50:53,003 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-26 20:50:53,019 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-26 20:50:53,020 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-26 20:50:53,020 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-26 20:50:53,020 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-26 20:50:53,020 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-26 20:50:53,020 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-26 20:50:53,021 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-26 20:50:53,021 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-26 20:50:53,033 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-26 20:50:53,035 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-26 20:50:53,077 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-26 20:50:53,078 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-26 20:50:53,084 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 0/43 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-26 20:50:53,087 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-26 20:50:53,104 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-26 20:50:53,104 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-26 20:50:53,106 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 0/43 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-26 20:50:53,108 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-26 20:50:53,109 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-26 20:50:54,246 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-12-26 20:50:54,385 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-26 20:50:54,385 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-26 20:50:54,390 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-26 20:50:54,402 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-26 20:50:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-26 20:50:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-26 20:50:54,411 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:54,412 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-26 20:50:54,413 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:54,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:54,420 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-26 20:50:54,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:54,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65679201] [2019-12-26 20:50:54,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:54,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65679201] [2019-12-26 20:50:54,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:50:54,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-26 20:50:54,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198830618] [2019-12-26 20:50:54,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-26 20:50:54,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:54,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-26 20:50:54,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-26 20:50:54,693 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-26 20:50:54,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:54,729 INFO L93 Difference]: Finished difference Result 48 states and 115 transitions. [2019-12-26 20:50:54,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-26 20:50:54,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-26 20:50:54,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:54,743 INFO L225 Difference]: With dead ends: 48 [2019-12-26 20:50:54,744 INFO L226 Difference]: Without dead ends: 28 [2019-12-26 20:50:54,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-26 20:50:54,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-26 20:50:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-26 20:50:54,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-26 20:50:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2019-12-26 20:50:54,804 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 5 [2019-12-26 20:50:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:54,804 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2019-12-26 20:50:54,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-26 20:50:54,805 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2019-12-26 20:50:54,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-26 20:50:54,805 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:54,806 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:54,806 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:54,806 INFO L82 PathProgramCache]: Analyzing trace with hash 232906128, now seen corresponding path program 1 times [2019-12-26 20:50:54,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:54,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492032140] [2019-12-26 20:50:54,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:54,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492032140] [2019-12-26 20:50:54,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:50:54,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-26 20:50:54,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894477459] [2019-12-26 20:50:54,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-26 20:50:54,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:54,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-26 20:50:54,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-26 20:50:54,880 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand 4 states. [2019-12-26 20:50:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:54,904 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-26 20:50:54,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-26 20:50:54,905 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-26 20:50:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:54,906 INFO L225 Difference]: With dead ends: 34 [2019-12-26 20:50:54,906 INFO L226 Difference]: Without dead ends: 30 [2019-12-26 20:50:54,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-26 20:50:54,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-26 20:50:54,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-26 20:50:54,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-26 20:50:54,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-26 20:50:54,913 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 7 [2019-12-26 20:50:54,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:54,913 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-26 20:50:54,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-26 20:50:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-26 20:50:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:50:54,914 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:54,914 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:54,915 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:54,915 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-26 20:50:54,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:54,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259181586] [2019-12-26 20:50:54,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:54,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259181586] [2019-12-26 20:50:54,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:50:54,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-26 20:50:54,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134803227] [2019-12-26 20:50:54,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-26 20:50:54,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:54,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-26 20:50:54,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:50:54,998 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 5 states. [2019-12-26 20:50:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:55,047 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-26 20:50:55,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-26 20:50:55,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-26 20:50:55,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:55,052 INFO L225 Difference]: With dead ends: 34 [2019-12-26 20:50:55,053 INFO L226 Difference]: Without dead ends: 28 [2019-12-26 20:50:55,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-26 20:50:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-26 20:50:55,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-12-26 20:50:55,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-26 20:50:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-26 20:50:55,061 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-26 20:50:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:55,062 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-26 20:50:55,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-26 20:50:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-26 20:50:55,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:50:55,065 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:55,065 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:55,065 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash 483962890, now seen corresponding path program 2 times [2019-12-26 20:50:55,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:55,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760748231] [2019-12-26 20:50:55,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:55,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760748231] [2019-12-26 20:50:55,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:50:55,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-26 20:50:55,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301714330] [2019-12-26 20:50:55,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-26 20:50:55,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:55,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-26 20:50:55,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:50:55,146 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 5 states. [2019-12-26 20:50:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:55,189 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-26 20:50:55,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:50:55,190 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-26 20:50:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:55,191 INFO L225 Difference]: With dead ends: 32 [2019-12-26 20:50:55,191 INFO L226 Difference]: Without dead ends: 28 [2019-12-26 20:50:55,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-26 20:50:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-26 20:50:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-26 20:50:55,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-26 20:50:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-26 20:50:55,199 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 9 [2019-12-26 20:50:55,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:55,200 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-26 20:50:55,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-26 20:50:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-26 20:50:55,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:50:55,202 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:55,202 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:55,202 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:55,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2133804259, now seen corresponding path program 3 times [2019-12-26 20:50:55,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:55,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726397243] [2019-12-26 20:50:55,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:55,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726397243] [2019-12-26 20:50:55,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231494858] [2019-12-26 20:50:55,265 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:55,350 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:50:55,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:55,355 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:50:55,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:55,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:55,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-26 20:50:55,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856976814] [2019-12-26 20:50:55,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-26 20:50:55,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:55,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-26 20:50:55,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-26 20:50:55,392 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 7 states. [2019-12-26 20:50:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:55,485 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-26 20:50:55,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:50:55,486 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-26 20:50:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:55,487 INFO L225 Difference]: With dead ends: 32 [2019-12-26 20:50:55,488 INFO L226 Difference]: Without dead ends: 29 [2019-12-26 20:50:55,488 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:50:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-26 20:50:55,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-26 20:50:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-26 20:50:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-26 20:50:55,496 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 10 [2019-12-26 20:50:55,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:55,496 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-26 20:50:55,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-26 20:50:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-26 20:50:55,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:50:55,498 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:55,498 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:55,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:55,707 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:55,707 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 4 times [2019-12-26 20:50:55,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:55,708 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195246946] [2019-12-26 20:50:55,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:55,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195246946] [2019-12-26 20:50:55,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279306853] [2019-12-26 20:50:55,795 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:50:55,847 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:50:55,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:55,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:50:55,849 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:55,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:55,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-26 20:50:55,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345285389] [2019-12-26 20:50:55,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-26 20:50:55,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:55,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-26 20:50:55,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-26 20:50:55,874 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 7 states. [2019-12-26 20:50:55,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:55,945 INFO L93 Difference]: Finished difference Result 33 states and 68 transitions. [2019-12-26 20:50:55,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:50:55,948 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-26 20:50:55,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:55,948 INFO L225 Difference]: With dead ends: 33 [2019-12-26 20:50:55,949 INFO L226 Difference]: Without dead ends: 30 [2019-12-26 20:50:55,949 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:50:55,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-26 20:50:55,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-26 20:50:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-26 20:50:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-26 20:50:55,956 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 10 [2019-12-26 20:50:55,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:55,957 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-26 20:50:55,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-26 20:50:55,957 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-26 20:50:55,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:50:55,957 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:55,958 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:56,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:56,161 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:56,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:56,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 5 times [2019-12-26 20:50:56,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:56,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282366266] [2019-12-26 20:50:56,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:56,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282366266] [2019-12-26 20:50:56,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261119624] [2019-12-26 20:50:56,260 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:56,323 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:50:56,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:56,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:50:56,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:56,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:56,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-26 20:50:56,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389254539] [2019-12-26 20:50:56,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:50:56,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:56,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:50:56,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:50:56,367 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 8 states. [2019-12-26 20:50:56,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:56,481 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-26 20:50:56,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:50:56,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-26 20:50:56,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:56,482 INFO L225 Difference]: With dead ends: 34 [2019-12-26 20:50:56,482 INFO L226 Difference]: Without dead ends: 31 [2019-12-26 20:50:56,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:50:56,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-26 20:50:56,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-12-26 20:50:56,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-26 20:50:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 48 transitions. [2019-12-26 20:50:56,492 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 48 transitions. Word has length 11 [2019-12-26 20:50:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:56,493 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 48 transitions. [2019-12-26 20:50:56,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:50:56,493 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 48 transitions. [2019-12-26 20:50:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:50:56,493 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:56,493 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:56,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:56,695 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:56,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1231878834, now seen corresponding path program 6 times [2019-12-26 20:50:56,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:56,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430183703] [2019-12-26 20:50:56,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:56,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430183703] [2019-12-26 20:50:56,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273723130] [2019-12-26 20:50:56,764 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:56,820 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:50:56,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:56,823 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:50:56,825 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:56,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:56,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-26 20:50:56,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711075875] [2019-12-26 20:50:56,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:50:56,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:56,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:50:56,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:50:56,852 INFO L87 Difference]: Start difference. First operand 23 states and 48 transitions. Second operand 8 states. [2019-12-26 20:50:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:56,933 INFO L93 Difference]: Finished difference Result 35 states and 72 transitions. [2019-12-26 20:50:56,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:50:56,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-26 20:50:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:56,934 INFO L225 Difference]: With dead ends: 35 [2019-12-26 20:50:56,934 INFO L226 Difference]: Without dead ends: 32 [2019-12-26 20:50:56,935 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:50:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-26 20:50:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-26 20:50:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-26 20:50:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-26 20:50:56,942 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 11 [2019-12-26 20:50:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:56,942 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-26 20:50:56,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:50:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-26 20:50:56,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:50:56,944 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:56,944 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:57,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:57,151 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:57,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:57,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1886502219, now seen corresponding path program 7 times [2019-12-26 20:50:57,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:57,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560886184] [2019-12-26 20:50:57,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:57,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560886184] [2019-12-26 20:50:57,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131470951] [2019-12-26 20:50:57,232 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:57,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:50:57,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:57,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:57,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-26 20:50:57,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341341496] [2019-12-26 20:50:57,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-26 20:50:57,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:57,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-26 20:50:57,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-26 20:50:57,299 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 9 states. [2019-12-26 20:50:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:57,396 INFO L93 Difference]: Finished difference Result 36 states and 74 transitions. [2019-12-26 20:50:57,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:50:57,396 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-26 20:50:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:57,397 INFO L225 Difference]: With dead ends: 36 [2019-12-26 20:50:57,397 INFO L226 Difference]: Without dead ends: 33 [2019-12-26 20:50:57,397 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:50:57,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-26 20:50:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-12-26 20:50:57,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-26 20:50:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 50 transitions. [2019-12-26 20:50:57,401 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 50 transitions. Word has length 12 [2019-12-26 20:50:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:57,402 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 50 transitions. [2019-12-26 20:50:57,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-26 20:50:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 50 transitions. [2019-12-26 20:50:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:50:57,403 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:57,403 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:57,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:57,606 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:57,606 INFO L82 PathProgramCache]: Analyzing trace with hash -466461505, now seen corresponding path program 8 times [2019-12-26 20:50:57,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:57,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443645204] [2019-12-26 20:50:57,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:57,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443645204] [2019-12-26 20:50:57,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562912790] [2019-12-26 20:50:57,669 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:57,712 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:50:57,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:57,713 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:50:57,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:57,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:57,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-26 20:50:57,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630312888] [2019-12-26 20:50:57,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-26 20:50:57,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:57,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-26 20:50:57,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-26 20:50:57,739 INFO L87 Difference]: Start difference. First operand 24 states and 50 transitions. Second operand 9 states. [2019-12-26 20:50:57,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:57,840 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-26 20:50:57,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:50:57,841 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-26 20:50:57,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:57,841 INFO L225 Difference]: With dead ends: 37 [2019-12-26 20:50:57,842 INFO L226 Difference]: Without dead ends: 34 [2019-12-26 20:50:57,842 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:50:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-26 20:50:57,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-26 20:50:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-26 20:50:57,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-26 20:50:57,847 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2019-12-26 20:50:57,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:57,849 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-26 20:50:57,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-26 20:50:57,850 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-26 20:50:57,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:50:57,851 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:57,851 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:58,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:58,052 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:58,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973050, now seen corresponding path program 9 times [2019-12-26 20:50:58,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:58,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585599143] [2019-12-26 20:50:58,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:58,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585599143] [2019-12-26 20:50:58,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092842451] [2019-12-26 20:50:58,137 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:58,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:50:58,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:58,198 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:50:58,199 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:58,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:58,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-26 20:50:58,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209064800] [2019-12-26 20:50:58,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:50:58,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:58,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:50:58,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:50:58,218 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 10 states. [2019-12-26 20:50:58,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:58,362 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-26 20:50:58,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:50:58,364 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-26 20:50:58,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:58,365 INFO L225 Difference]: With dead ends: 38 [2019-12-26 20:50:58,365 INFO L226 Difference]: Without dead ends: 35 [2019-12-26 20:50:58,365 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:50:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-26 20:50:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2019-12-26 20:50:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-26 20:50:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 52 transitions. [2019-12-26 20:50:58,372 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 52 transitions. Word has length 13 [2019-12-26 20:50:58,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:58,372 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 52 transitions. [2019-12-26 20:50:58,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:50:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 52 transitions. [2019-12-26 20:50:58,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:50:58,373 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:58,373 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:58,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:58,578 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:58,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 10 times [2019-12-26 20:50:58,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:58,579 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579338561] [2019-12-26 20:50:58,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:58,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579338561] [2019-12-26 20:50:58,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136038915] [2019-12-26 20:50:58,651 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:50:58,693 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:50:58,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:58,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:50:58,695 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:58,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:58,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-26 20:50:58,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205063436] [2019-12-26 20:50:58,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:50:58,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:50:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:50:58,720 INFO L87 Difference]: Start difference. First operand 25 states and 52 transitions. Second operand 10 states. [2019-12-26 20:50:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:58,844 INFO L93 Difference]: Finished difference Result 39 states and 80 transitions. [2019-12-26 20:50:58,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:50:58,845 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-26 20:50:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:58,845 INFO L225 Difference]: With dead ends: 39 [2019-12-26 20:50:58,845 INFO L226 Difference]: Without dead ends: 36 [2019-12-26 20:50:58,846 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:50:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-26 20:50:58,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-26 20:50:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-26 20:50:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-26 20:50:58,851 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 13 [2019-12-26 20:50:58,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:58,851 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-26 20:50:58,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:50:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-26 20:50:58,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:50:58,852 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:58,852 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:59,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:59,062 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:59,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:59,062 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 11 times [2019-12-26 20:50:59,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:59,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200527977] [2019-12-26 20:50:59,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:59,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200527977] [2019-12-26 20:50:59,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400704163] [2019-12-26 20:50:59,154 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:59,201 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:50:59,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:59,202 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:50:59,203 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:59,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:59,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-26 20:50:59,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671306215] [2019-12-26 20:50:59,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-26 20:50:59,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:59,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-26 20:50:59,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-26 20:50:59,225 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 11 states. [2019-12-26 20:50:59,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:59,361 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-26 20:50:59,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:50:59,362 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-26 20:50:59,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:59,363 INFO L225 Difference]: With dead ends: 40 [2019-12-26 20:50:59,363 INFO L226 Difference]: Without dead ends: 37 [2019-12-26 20:50:59,367 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:50:59,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-26 20:50:59,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-12-26 20:50:59,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-26 20:50:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-26 20:50:59,374 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 14 [2019-12-26 20:50:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:59,374 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-26 20:50:59,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-26 20:50:59,375 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-26 20:50:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:50:59,375 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:59,376 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:59,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:59,586 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:59,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 12 times [2019-12-26 20:50:59,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:59,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928058019] [2019-12-26 20:50:59,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:59,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928058019] [2019-12-26 20:50:59,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670074090] [2019-12-26 20:50:59,657 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:59,722 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:50:59,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:59,724 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:50:59,725 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:59,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:59,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-26 20:50:59,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576512917] [2019-12-26 20:50:59,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-26 20:50:59,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:59,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-26 20:50:59,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-26 20:50:59,749 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 11 states. [2019-12-26 20:50:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:59,912 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-26 20:50:59,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:50:59,912 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-26 20:50:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:59,913 INFO L225 Difference]: With dead ends: 41 [2019-12-26 20:50:59,913 INFO L226 Difference]: Without dead ends: 38 [2019-12-26 20:50:59,913 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:50:59,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-26 20:50:59,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-26 20:50:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-26 20:50:59,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-26 20:50:59,917 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 14 [2019-12-26 20:50:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:59,918 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-26 20:50:59,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-26 20:50:59,918 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-26 20:50:59,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-26 20:50:59,918 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:59,919 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:00,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:00,121 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833246, now seen corresponding path program 13 times [2019-12-26 20:51:00,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:00,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262301464] [2019-12-26 20:51:00,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:00,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262301464] [2019-12-26 20:51:00,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830901008] [2019-12-26 20:51:00,208 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:00,262 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:51:00,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:00,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:00,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-26 20:51:00,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945266617] [2019-12-26 20:51:00,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:51:00,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:00,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:51:00,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:51:00,296 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 12 states. [2019-12-26 20:51:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:00,500 INFO L93 Difference]: Finished difference Result 42 states and 86 transitions. [2019-12-26 20:51:00,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:51:00,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-26 20:51:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:00,501 INFO L225 Difference]: With dead ends: 42 [2019-12-26 20:51:00,502 INFO L226 Difference]: Without dead ends: 39 [2019-12-26 20:51:00,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:51:00,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-26 20:51:00,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-12-26 20:51:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-26 20:51:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-26 20:51:00,510 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 15 [2019-12-26 20:51:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:00,510 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-26 20:51:00,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:51:00,510 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-26 20:51:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-26 20:51:00,511 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:00,511 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:00,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:00,716 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:00,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:00,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2135428606, now seen corresponding path program 14 times [2019-12-26 20:51:00,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:00,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118936823] [2019-12-26 20:51:00,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:00,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118936823] [2019-12-26 20:51:00,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695420560] [2019-12-26 20:51:00,792 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:00,839 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:00,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:00,840 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:51:00,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:00,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:00,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-26 20:51:00,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487721351] [2019-12-26 20:51:00,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:51:00,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:00,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:51:00,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:51:00,868 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 12 states. [2019-12-26 20:51:01,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:01,048 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-12-26 20:51:01,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:51:01,048 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-26 20:51:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:01,049 INFO L225 Difference]: With dead ends: 43 [2019-12-26 20:51:01,049 INFO L226 Difference]: Without dead ends: 40 [2019-12-26 20:51:01,050 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:51:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-26 20:51:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-26 20:51:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-26 20:51:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-26 20:51:01,053 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 15 [2019-12-26 20:51:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:01,054 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-26 20:51:01,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:51:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-26 20:51:01,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-26 20:51:01,054 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:01,055 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:01,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:01,258 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:01,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 15 times [2019-12-26 20:51:01,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:01,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635193657] [2019-12-26 20:51:01,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:01,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635193657] [2019-12-26 20:51:01,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975546559] [2019-12-26 20:51:01,363 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:01,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-26 20:51:01,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:01,412 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-26 20:51:01,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:01,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:01,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-26 20:51:01,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906618040] [2019-12-26 20:51:01,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-26 20:51:01,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:01,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-26 20:51:01,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:51:01,438 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 13 states. [2019-12-26 20:51:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:01,645 INFO L93 Difference]: Finished difference Result 44 states and 90 transitions. [2019-12-26 20:51:01,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:51:01,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-26 20:51:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:01,646 INFO L225 Difference]: With dead ends: 44 [2019-12-26 20:51:01,646 INFO L226 Difference]: Without dead ends: 41 [2019-12-26 20:51:01,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:51:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-26 20:51:01,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2019-12-26 20:51:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-26 20:51:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-26 20:51:01,651 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 16 [2019-12-26 20:51:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:01,651 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-26 20:51:01,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-26 20:51:01,651 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-26 20:51:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-26 20:51:01,652 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:01,652 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:01,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:01,855 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:01,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 16 times [2019-12-26 20:51:01,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:01,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605578235] [2019-12-26 20:51:01,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:01,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605578235] [2019-12-26 20:51:01,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344737691] [2019-12-26 20:51:01,949 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:51:02,002 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:02,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:02,003 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-26 20:51:02,004 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:02,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:02,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-26 20:51:02,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773162579] [2019-12-26 20:51:02,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-26 20:51:02,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:02,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-26 20:51:02,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:51:02,020 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 13 states. [2019-12-26 20:51:02,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:02,212 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-12-26 20:51:02,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:51:02,213 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-26 20:51:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:02,214 INFO L225 Difference]: With dead ends: 45 [2019-12-26 20:51:02,214 INFO L226 Difference]: Without dead ends: 42 [2019-12-26 20:51:02,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:51:02,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-26 20:51:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-26 20:51:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-26 20:51:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-26 20:51:02,218 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 16 [2019-12-26 20:51:02,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:02,218 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-26 20:51:02,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-26 20:51:02,218 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-26 20:51:02,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-26 20:51:02,219 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:02,219 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:02,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:02,427 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:02,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:02,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090998, now seen corresponding path program 17 times [2019-12-26 20:51:02,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:02,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677489809] [2019-12-26 20:51:02,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:02,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677489809] [2019-12-26 20:51:02,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070120981] [2019-12-26 20:51:02,543 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:02,610 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-26 20:51:02,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:02,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-26 20:51:02,613 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:02,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:02,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-26 20:51:02,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777875346] [2019-12-26 20:51:02,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:51:02,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:02,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:51:02,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:51:02,636 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 14 states. [2019-12-26 20:51:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:02,872 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-26 20:51:02,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:51:02,872 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-26 20:51:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:02,873 INFO L225 Difference]: With dead ends: 46 [2019-12-26 20:51:02,873 INFO L226 Difference]: Without dead ends: 43 [2019-12-26 20:51:02,873 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:51:02,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-26 20:51:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2019-12-26 20:51:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-26 20:51:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-26 20:51:02,876 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 17 [2019-12-26 20:51:02,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:02,876 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-26 20:51:02,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:51:02,876 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-26 20:51:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-26 20:51:02,877 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:02,877 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:03,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:03,080 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:03,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:03,081 INFO L82 PathProgramCache]: Analyzing trace with hash 847486634, now seen corresponding path program 18 times [2019-12-26 20:51:03,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:03,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521722148] [2019-12-26 20:51:03,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:03,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521722148] [2019-12-26 20:51:03,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603511313] [2019-12-26 20:51:03,197 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:03,248 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-26 20:51:03,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:03,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-26 20:51:03,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:03,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:03,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-26 20:51:03,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441124241] [2019-12-26 20:51:03,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:51:03,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:03,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:51:03,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:51:03,277 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 14 states. [2019-12-26 20:51:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:03,535 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-12-26 20:51:03,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:51:03,536 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-26 20:51:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:03,537 INFO L225 Difference]: With dead ends: 47 [2019-12-26 20:51:03,538 INFO L226 Difference]: Without dead ends: 44 [2019-12-26 20:51:03,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:51:03,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-26 20:51:03,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-26 20:51:03,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-26 20:51:03,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-26 20:51:03,543 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 17 [2019-12-26 20:51:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:03,552 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-26 20:51:03,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:51:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-26 20:51:03,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-26 20:51:03,553 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:03,553 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:03,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:03,756 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:03,756 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 19 times [2019-12-26 20:51:03,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:03,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380382706] [2019-12-26 20:51:03,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:03,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380382706] [2019-12-26 20:51:03,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043005170] [2019-12-26 20:51:03,863 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:03,912 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-26 20:51:03,913 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:03,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:03,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-26 20:51:03,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929328264] [2019-12-26 20:51:03,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-26 20:51:03,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:03,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-26 20:51:03,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-26 20:51:03,937 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 15 states. [2019-12-26 20:51:04,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:04,168 INFO L93 Difference]: Finished difference Result 48 states and 98 transitions. [2019-12-26 20:51:04,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:51:04,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-26 20:51:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:04,169 INFO L225 Difference]: With dead ends: 48 [2019-12-26 20:51:04,169 INFO L226 Difference]: Without dead ends: 45 [2019-12-26 20:51:04,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:51:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-26 20:51:04,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2019-12-26 20:51:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-26 20:51:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-26 20:51:04,174 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 18 [2019-12-26 20:51:04,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:04,174 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-26 20:51:04,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-26 20:51:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-26 20:51:04,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-26 20:51:04,175 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:04,175 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:04,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:04,378 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:04,379 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 20 times [2019-12-26 20:51:04,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:04,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399454826] [2019-12-26 20:51:04,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:04,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399454826] [2019-12-26 20:51:04,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102502556] [2019-12-26 20:51:04,508 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:04,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:04,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:04,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-26 20:51:04,607 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:04,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:04,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-26 20:51:04,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766233069] [2019-12-26 20:51:04,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-26 20:51:04,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:04,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-26 20:51:04,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-26 20:51:04,638 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 15 states. [2019-12-26 20:51:04,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:04,956 INFO L93 Difference]: Finished difference Result 49 states and 100 transitions. [2019-12-26 20:51:04,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:51:04,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-26 20:51:04,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:04,958 INFO L225 Difference]: With dead ends: 49 [2019-12-26 20:51:04,958 INFO L226 Difference]: Without dead ends: 46 [2019-12-26 20:51:04,959 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:51:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-26 20:51:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-12-26 20:51:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-26 20:51:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 94 transitions. [2019-12-26 20:51:04,970 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 94 transitions. Word has length 18 [2019-12-26 20:51:04,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:04,970 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 94 transitions. [2019-12-26 20:51:04,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-26 20:51:04,970 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 94 transitions. [2019-12-26 20:51:04,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-26 20:51:04,971 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:04,974 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:05,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:05,175 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:05,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:05,175 INFO L82 PathProgramCache]: Analyzing trace with hash -2080307442, now seen corresponding path program 21 times [2019-12-26 20:51:05,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:05,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280565471] [2019-12-26 20:51:05,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:05,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280565471] [2019-12-26 20:51:05,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679439343] [2019-12-26 20:51:05,298 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:05,355 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-26 20:51:05,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:05,357 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-26 20:51:05,358 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:05,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:05,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-26 20:51:05,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568520144] [2019-12-26 20:51:05,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:51:05,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:05,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:51:05,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:51:05,382 INFO L87 Difference]: Start difference. First operand 46 states and 94 transitions. Second operand 16 states. [2019-12-26 20:51:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:05,657 INFO L93 Difference]: Finished difference Result 50 states and 102 transitions. [2019-12-26 20:51:05,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:51:05,658 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-26 20:51:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:05,658 INFO L225 Difference]: With dead ends: 50 [2019-12-26 20:51:05,658 INFO L226 Difference]: Without dead ends: 47 [2019-12-26 20:51:05,659 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=254, Invalid=502, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:51:05,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-26 20:51:05,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2019-12-26 20:51:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-26 20:51:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 64 transitions. [2019-12-26 20:51:05,662 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 64 transitions. Word has length 19 [2019-12-26 20:51:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:05,662 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 64 transitions. [2019-12-26 20:51:05,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:51:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 64 transitions. [2019-12-26 20:51:05,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-26 20:51:05,663 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:05,663 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:05,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:05,867 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:05,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:05,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1609121454, now seen corresponding path program 22 times [2019-12-26 20:51:05,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:05,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689298827] [2019-12-26 20:51:05,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:05,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689298827] [2019-12-26 20:51:05,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215129517] [2019-12-26 20:51:05,989 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:51:06,038 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:06,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:06,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-26 20:51:06,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:06,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:06,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-26 20:51:06,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900451745] [2019-12-26 20:51:06,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:51:06,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:06,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:51:06,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:51:06,064 INFO L87 Difference]: Start difference. First operand 31 states and 64 transitions. Second operand 16 states. [2019-12-26 20:51:06,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:06,341 INFO L93 Difference]: Finished difference Result 51 states and 104 transitions. [2019-12-26 20:51:06,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:51:06,341 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-26 20:51:06,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:06,342 INFO L225 Difference]: With dead ends: 51 [2019-12-26 20:51:06,342 INFO L226 Difference]: Without dead ends: 48 [2019-12-26 20:51:06,343 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:51:06,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-26 20:51:06,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-12-26 20:51:06,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-26 20:51:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 98 transitions. [2019-12-26 20:51:06,345 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 98 transitions. Word has length 19 [2019-12-26 20:51:06,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:06,346 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 98 transitions. [2019-12-26 20:51:06,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:51:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 98 transitions. [2019-12-26 20:51:06,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-26 20:51:06,346 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:06,346 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:06,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:06,548 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:06,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:06,549 INFO L82 PathProgramCache]: Analyzing trace with hash -65021205, now seen corresponding path program 23 times [2019-12-26 20:51:06,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:06,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384990011] [2019-12-26 20:51:06,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:06,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384990011] [2019-12-26 20:51:06,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515274307] [2019-12-26 20:51:06,713 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:06,775 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-26 20:51:06,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:06,776 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-26 20:51:06,777 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:06,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:06,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-26 20:51:06,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244297584] [2019-12-26 20:51:06,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-26 20:51:06,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:06,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-26 20:51:06,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:51:06,816 INFO L87 Difference]: Start difference. First operand 48 states and 98 transitions. Second operand 17 states. [2019-12-26 20:51:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:07,080 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2019-12-26 20:51:07,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:51:07,080 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-26 20:51:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:07,081 INFO L225 Difference]: With dead ends: 52 [2019-12-26 20:51:07,081 INFO L226 Difference]: Without dead ends: 49 [2019-12-26 20:51:07,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:51:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-26 20:51:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2019-12-26 20:51:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-26 20:51:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-26 20:51:07,085 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 20 [2019-12-26 20:51:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:07,085 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-26 20:51:07,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-26 20:51:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-26 20:51:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-26 20:51:07,085 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:07,086 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:07,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:07,289 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:07,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:07,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1656842783, now seen corresponding path program 24 times [2019-12-26 20:51:07,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:07,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551655238] [2019-12-26 20:51:07,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:07,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551655238] [2019-12-26 20:51:07,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877764581] [2019-12-26 20:51:07,398 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:07,456 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-26 20:51:07,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:07,457 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-26 20:51:07,458 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:07,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:07,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-26 20:51:07,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578998728] [2019-12-26 20:51:07,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-26 20:51:07,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:07,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-26 20:51:07,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:51:07,493 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 17 states. [2019-12-26 20:51:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:07,777 INFO L93 Difference]: Finished difference Result 53 states and 108 transitions. [2019-12-26 20:51:07,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:51:07,778 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-26 20:51:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:07,779 INFO L225 Difference]: With dead ends: 53 [2019-12-26 20:51:07,779 INFO L226 Difference]: Without dead ends: 50 [2019-12-26 20:51:07,780 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:51:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-26 20:51:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-26 20:51:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-26 20:51:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2019-12-26 20:51:07,787 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 20 [2019-12-26 20:51:07,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:07,787 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2019-12-26 20:51:07,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-26 20:51:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2019-12-26 20:51:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-26 20:51:07,788 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:07,788 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:07,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:07,992 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:07,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:07,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2015657050, now seen corresponding path program 25 times [2019-12-26 20:51:07,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:07,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755899573] [2019-12-26 20:51:07,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:08,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755899573] [2019-12-26 20:51:08,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263485170] [2019-12-26 20:51:08,123 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:08,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-26 20:51:08,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:08,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:08,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-26 20:51:08,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528284686] [2019-12-26 20:51:08,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:51:08,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:08,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:51:08,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:51:08,207 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand 18 states. [2019-12-26 20:51:08,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:08,508 INFO L93 Difference]: Finished difference Result 54 states and 110 transitions. [2019-12-26 20:51:08,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:51:08,508 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-12-26 20:51:08,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:08,509 INFO L225 Difference]: With dead ends: 54 [2019-12-26 20:51:08,509 INFO L226 Difference]: Without dead ends: 51 [2019-12-26 20:51:08,510 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=662, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:51:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-26 20:51:08,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2019-12-26 20:51:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-26 20:51:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 68 transitions. [2019-12-26 20:51:08,513 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 68 transitions. Word has length 21 [2019-12-26 20:51:08,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:08,513 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 68 transitions. [2019-12-26 20:51:08,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:51:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 68 transitions. [2019-12-26 20:51:08,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-26 20:51:08,514 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:08,514 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:08,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:08,716 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:08,717 INFO L82 PathProgramCache]: Analyzing trace with hash -177481222, now seen corresponding path program 26 times [2019-12-26 20:51:08,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:08,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88562506] [2019-12-26 20:51:08,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:08,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88562506] [2019-12-26 20:51:08,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092543284] [2019-12-26 20:51:08,837 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:08,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:08,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:08,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-26 20:51:08,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:08,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:08,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-26 20:51:08,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218274866] [2019-12-26 20:51:08,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:51:08,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:08,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:51:08,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:51:08,918 INFO L87 Difference]: Start difference. First operand 33 states and 68 transitions. Second operand 18 states. [2019-12-26 20:51:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:09,221 INFO L93 Difference]: Finished difference Result 55 states and 112 transitions. [2019-12-26 20:51:09,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:51:09,222 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-12-26 20:51:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:09,223 INFO L225 Difference]: With dead ends: 55 [2019-12-26 20:51:09,223 INFO L226 Difference]: Without dead ends: 52 [2019-12-26 20:51:09,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:51:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-26 20:51:09,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-26 20:51:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-26 20:51:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-26 20:51:09,227 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 21 [2019-12-26 20:51:09,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:09,228 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-26 20:51:09,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:51:09,228 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-26 20:51:09,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-26 20:51:09,229 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:09,229 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:09,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:09,432 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:09,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:09,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1939140947, now seen corresponding path program 27 times [2019-12-26 20:51:09,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:09,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224699988] [2019-12-26 20:51:09,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:09,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224699988] [2019-12-26 20:51:09,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598075567] [2019-12-26 20:51:09,637 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:09,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-26 20:51:09,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:09,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-26 20:51:09,693 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:09,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:09,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-26 20:51:09,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405913521] [2019-12-26 20:51:09,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-26 20:51:09,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:09,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-26 20:51:09,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:51:09,720 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 19 states. [2019-12-26 20:51:10,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:10,054 INFO L93 Difference]: Finished difference Result 56 states and 114 transitions. [2019-12-26 20:51:10,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:51:10,055 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-12-26 20:51:10,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:10,055 INFO L225 Difference]: With dead ends: 56 [2019-12-26 20:51:10,055 INFO L226 Difference]: Without dead ends: 53 [2019-12-26 20:51:10,056 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2019-12-26 20:51:10,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-26 20:51:10,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2019-12-26 20:51:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-26 20:51:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-26 20:51:10,058 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 22 [2019-12-26 20:51:10,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:10,058 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-26 20:51:10,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-26 20:51:10,058 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-26 20:51:10,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-26 20:51:10,059 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:10,059 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:10,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:10,260 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:10,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:10,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1206950281, now seen corresponding path program 28 times [2019-12-26 20:51:10,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:10,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378073390] [2019-12-26 20:51:10,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:10,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378073390] [2019-12-26 20:51:10,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449272552] [2019-12-26 20:51:10,398 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:51:10,448 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:10,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:10,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-26 20:51:10,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:10,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:10,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-26 20:51:10,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128970881] [2019-12-26 20:51:10,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-26 20:51:10,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:10,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-26 20:51:10,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:51:10,480 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 19 states. [2019-12-26 20:51:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:10,844 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-12-26 20:51:10,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:51:10,845 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-12-26 20:51:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:10,846 INFO L225 Difference]: With dead ends: 57 [2019-12-26 20:51:10,846 INFO L226 Difference]: Without dead ends: 54 [2019-12-26 20:51:10,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:51:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-26 20:51:10,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-26 20:51:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-26 20:51:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2019-12-26 20:51:10,850 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 22 [2019-12-26 20:51:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:10,850 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2019-12-26 20:51:10,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-26 20:51:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2019-12-26 20:51:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-26 20:51:10,851 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:10,851 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:11,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:11,055 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:11,056 INFO L82 PathProgramCache]: Analyzing trace with hash -16172482, now seen corresponding path program 29 times [2019-12-26 20:51:11,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:11,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780119296] [2019-12-26 20:51:11,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:11,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780119296] [2019-12-26 20:51:11,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286281076] [2019-12-26 20:51:11,237 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:11,296 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-26 20:51:11,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:11,297 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-26 20:51:11,297 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:11,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:11,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-26 20:51:11,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234271053] [2019-12-26 20:51:11,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-26 20:51:11,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:11,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-26 20:51:11,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:51:11,329 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand 20 states. [2019-12-26 20:51:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:11,700 INFO L93 Difference]: Finished difference Result 58 states and 118 transitions. [2019-12-26 20:51:11,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:51:11,701 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-12-26 20:51:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:11,701 INFO L225 Difference]: With dead ends: 58 [2019-12-26 20:51:11,702 INFO L226 Difference]: Without dead ends: 55 [2019-12-26 20:51:11,703 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=416, Invalid=844, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:51:11,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-26 20:51:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2019-12-26 20:51:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-26 20:51:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2019-12-26 20:51:11,706 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 23 [2019-12-26 20:51:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:11,706 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2019-12-26 20:51:11,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-26 20:51:11,706 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2019-12-26 20:51:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-26 20:51:11,707 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:11,707 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:11,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:11,910 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:11,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:11,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1239247010, now seen corresponding path program 30 times [2019-12-26 20:51:11,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:11,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299379476] [2019-12-26 20:51:11,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:12,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299379476] [2019-12-26 20:51:12,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769694439] [2019-12-26 20:51:12,102 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:12,166 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-26 20:51:12,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:12,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-26 20:51:12,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:12,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:12,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-26 20:51:12,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288898477] [2019-12-26 20:51:12,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-26 20:51:12,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:12,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-26 20:51:12,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:51:12,215 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand 20 states. [2019-12-26 20:51:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:12,577 INFO L93 Difference]: Finished difference Result 59 states and 120 transitions. [2019-12-26 20:51:12,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:51:12,578 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-12-26 20:51:12,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:12,579 INFO L225 Difference]: With dead ends: 59 [2019-12-26 20:51:12,579 INFO L226 Difference]: Without dead ends: 56 [2019-12-26 20:51:12,580 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=386, Invalid=874, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:51:12,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-26 20:51:12,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-26 20:51:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-26 20:51:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 114 transitions. [2019-12-26 20:51:12,582 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 114 transitions. Word has length 23 [2019-12-26 20:51:12,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:12,582 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 114 transitions. [2019-12-26 20:51:12,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-26 20:51:12,583 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 114 transitions. [2019-12-26 20:51:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-26 20:51:12,583 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:12,583 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:12,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:12,784 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:12,784 INFO L82 PathProgramCache]: Analyzing trace with hash -501346885, now seen corresponding path program 31 times [2019-12-26 20:51:12,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:12,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549999943] [2019-12-26 20:51:12,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:12,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549999943] [2019-12-26 20:51:12,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758259589] [2019-12-26 20:51:12,996 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:13,053 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-26 20:51:13,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:13,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:13,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-26 20:51:13,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003702836] [2019-12-26 20:51:13,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-26 20:51:13,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:13,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-26 20:51:13,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:51:13,101 INFO L87 Difference]: Start difference. First operand 56 states and 114 transitions. Second operand 21 states. [2019-12-26 20:51:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:13,492 INFO L93 Difference]: Finished difference Result 60 states and 122 transitions. [2019-12-26 20:51:13,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:51:13,493 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-12-26 20:51:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:13,494 INFO L225 Difference]: With dead ends: 60 [2019-12-26 20:51:13,494 INFO L226 Difference]: Without dead ends: 57 [2019-12-26 20:51:13,495 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=442, Invalid=890, Unknown=0, NotChecked=0, Total=1332 [2019-12-26 20:51:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-26 20:51:13,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2019-12-26 20:51:13,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-26 20:51:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-26 20:51:13,499 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 24 [2019-12-26 20:51:13,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:13,499 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-26 20:51:13,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-26 20:51:13,499 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-26 20:51:13,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-26 20:51:13,499 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:13,500 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:13,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:13,703 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:13,704 INFO L82 PathProgramCache]: Analyzing trace with hash -238048049, now seen corresponding path program 32 times [2019-12-26 20:51:13,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:13,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991111297] [2019-12-26 20:51:13,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:13,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991111297] [2019-12-26 20:51:13,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717650453] [2019-12-26 20:51:13,869 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:13,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:13,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:13,928 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-26 20:51:13,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:13,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:13,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-26 20:51:13,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531343324] [2019-12-26 20:51:13,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-26 20:51:13,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:13,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-26 20:51:13,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:51:13,955 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 21 states. [2019-12-26 20:51:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:14,379 INFO L93 Difference]: Finished difference Result 61 states and 124 transitions. [2019-12-26 20:51:14,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:51:14,380 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-12-26 20:51:14,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:14,381 INFO L225 Difference]: With dead ends: 61 [2019-12-26 20:51:14,381 INFO L226 Difference]: Without dead ends: 58 [2019-12-26 20:51:14,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=462, Invalid=944, Unknown=0, NotChecked=0, Total=1406 [2019-12-26 20:51:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-26 20:51:14,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-12-26 20:51:14,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-26 20:51:14,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2019-12-26 20:51:14,385 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 24 [2019-12-26 20:51:14,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:14,385 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2019-12-26 20:51:14,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-26 20:51:14,385 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2019-12-26 20:51:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-26 20:51:14,386 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:14,386 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:14,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:14,590 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:14,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:14,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1638116054, now seen corresponding path program 33 times [2019-12-26 20:51:14,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:14,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628220968] [2019-12-26 20:51:14,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:14,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628220968] [2019-12-26 20:51:14,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985098193] [2019-12-26 20:51:14,832 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:14,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-26 20:51:14,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:14,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-26 20:51:14,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:14,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:14,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-26 20:51:14,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342881465] [2019-12-26 20:51:14,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-26 20:51:14,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:14,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-26 20:51:14,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:51:14,951 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand 22 states. [2019-12-26 20:51:15,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:15,427 INFO L93 Difference]: Finished difference Result 62 states and 126 transitions. [2019-12-26 20:51:15,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:51:15,427 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-12-26 20:51:15,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:15,428 INFO L225 Difference]: With dead ends: 62 [2019-12-26 20:51:15,428 INFO L226 Difference]: Without dead ends: 59 [2019-12-26 20:51:15,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=512, Invalid=1048, Unknown=0, NotChecked=0, Total=1560 [2019-12-26 20:51:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-26 20:51:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2019-12-26 20:51:15,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-26 20:51:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 76 transitions. [2019-12-26 20:51:15,431 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 76 transitions. Word has length 25 [2019-12-26 20:51:15,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:15,431 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 76 transitions. [2019-12-26 20:51:15,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-26 20:51:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 76 transitions. [2019-12-26 20:51:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-26 20:51:15,432 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:15,432 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:15,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:15,633 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:15,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1210445130, now seen corresponding path program 34 times [2019-12-26 20:51:15,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:15,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597409552] [2019-12-26 20:51:15,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:15,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597409552] [2019-12-26 20:51:15,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111973175] [2019-12-26 20:51:15,861 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:15,949 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:15,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:15,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-26 20:51:15,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:15,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:15,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-26 20:51:15,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300129026] [2019-12-26 20:51:15,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-26 20:51:15,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:15,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-26 20:51:15,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:51:15,987 INFO L87 Difference]: Start difference. First operand 37 states and 76 transitions. Second operand 22 states. [2019-12-26 20:51:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:16,518 INFO L93 Difference]: Finished difference Result 63 states and 128 transitions. [2019-12-26 20:51:16,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:51:16,519 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-12-26 20:51:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:16,519 INFO L225 Difference]: With dead ends: 63 [2019-12-26 20:51:16,519 INFO L226 Difference]: Without dead ends: 60 [2019-12-26 20:51:16,520 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=527, Invalid=1033, Unknown=0, NotChecked=0, Total=1560 [2019-12-26 20:51:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-26 20:51:16,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-26 20:51:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-26 20:51:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 122 transitions. [2019-12-26 20:51:16,522 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 122 transitions. Word has length 25 [2019-12-26 20:51:16,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:16,523 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 122 transitions. [2019-12-26 20:51:16,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-26 20:51:16,523 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 122 transitions. [2019-12-26 20:51:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-26 20:51:16,523 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:16,523 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:16,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:16,724 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:16,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:16,724 INFO L82 PathProgramCache]: Analyzing trace with hash -758009821, now seen corresponding path program 35 times [2019-12-26 20:51:16,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:16,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730692378] [2019-12-26 20:51:16,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:16,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730692378] [2019-12-26 20:51:16,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808742183] [2019-12-26 20:51:16,951 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:17,012 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-26 20:51:17,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:17,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-26 20:51:17,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:17,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:17,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-26 20:51:17,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748492635] [2019-12-26 20:51:17,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-26 20:51:17,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:17,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-26 20:51:17,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:51:17,050 INFO L87 Difference]: Start difference. First operand 60 states and 122 transitions. Second operand 23 states. [2019-12-26 20:51:17,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:17,552 INFO L93 Difference]: Finished difference Result 64 states and 130 transitions. [2019-12-26 20:51:17,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:51:17,553 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-12-26 20:51:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:17,554 INFO L225 Difference]: With dead ends: 64 [2019-12-26 20:51:17,554 INFO L226 Difference]: Without dead ends: 61 [2019-12-26 20:51:17,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=541, Invalid=1099, Unknown=0, NotChecked=0, Total=1640 [2019-12-26 20:51:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-26 20:51:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2019-12-26 20:51:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-26 20:51:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-26 20:51:17,558 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 26 [2019-12-26 20:51:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:17,559 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-26 20:51:17,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-26 20:51:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-26 20:51:17,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-26 20:51:17,559 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:17,559 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:17,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:17,760 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:17,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1130906329, now seen corresponding path program 36 times [2019-12-26 20:51:17,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:17,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811450116] [2019-12-26 20:51:17,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:17,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811450116] [2019-12-26 20:51:17,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830972589] [2019-12-26 20:51:17,967 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:18,061 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-12-26 20:51:18,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:18,063 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-26 20:51:18,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:18,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:18,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-26 20:51:18,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941995147] [2019-12-26 20:51:18,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-26 20:51:18,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:18,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-26 20:51:18,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:51:18,095 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 23 states. [2019-12-26 20:51:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:18,576 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2019-12-26 20:51:18,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:51:18,576 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-12-26 20:51:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:18,577 INFO L225 Difference]: With dead ends: 65 [2019-12-26 20:51:18,577 INFO L226 Difference]: Without dead ends: 62 [2019-12-26 20:51:18,578 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2019-12-26 20:51:18,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-26 20:51:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-26 20:51:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-26 20:51:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 126 transitions. [2019-12-26 20:51:18,581 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 126 transitions. Word has length 26 [2019-12-26 20:51:18,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:18,581 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 126 transitions. [2019-12-26 20:51:18,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-26 20:51:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 126 transitions. [2019-12-26 20:51:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-26 20:51:18,582 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:18,582 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:18,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:18,785 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:18,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:18,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2023467666, now seen corresponding path program 37 times [2019-12-26 20:51:18,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:18,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660839745] [2019-12-26 20:51:18,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:18,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660839745] [2019-12-26 20:51:18,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701390372] [2019-12-26 20:51:18,985 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:19,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-26 20:51:19,044 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:19,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:19,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-26 20:51:19,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060275687] [2019-12-26 20:51:19,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-26 20:51:19,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:19,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-26 20:51:19,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:51:19,087 INFO L87 Difference]: Start difference. First operand 62 states and 126 transitions. Second operand 24 states. [2019-12-26 20:51:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:19,604 INFO L93 Difference]: Finished difference Result 66 states and 134 transitions. [2019-12-26 20:51:19,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:51:19,605 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-12-26 20:51:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:19,606 INFO L225 Difference]: With dead ends: 66 [2019-12-26 20:51:19,606 INFO L226 Difference]: Without dead ends: 63 [2019-12-26 20:51:19,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2019-12-26 20:51:19,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-26 20:51:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2019-12-26 20:51:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-26 20:51:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 80 transitions. [2019-12-26 20:51:19,610 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 80 transitions. Word has length 27 [2019-12-26 20:51:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:19,610 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 80 transitions. [2019-12-26 20:51:19,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-26 20:51:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 80 transitions. [2019-12-26 20:51:19,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-26 20:51:19,611 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:19,611 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:19,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:19,812 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:19,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:19,813 INFO L82 PathProgramCache]: Analyzing trace with hash -698357774, now seen corresponding path program 38 times [2019-12-26 20:51:19,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:19,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097161352] [2019-12-26 20:51:19,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:20,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097161352] [2019-12-26 20:51:20,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791808606] [2019-12-26 20:51:20,005 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:20,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:20,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:20,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-26 20:51:20,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:20,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:20,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-26 20:51:20,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610331835] [2019-12-26 20:51:20,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-26 20:51:20,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:20,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-26 20:51:20,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:51:20,090 INFO L87 Difference]: Start difference. First operand 39 states and 80 transitions. Second operand 24 states. [2019-12-26 20:51:20,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:20,604 INFO L93 Difference]: Finished difference Result 67 states and 136 transitions. [2019-12-26 20:51:20,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:51:20,605 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-12-26 20:51:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:20,606 INFO L225 Difference]: With dead ends: 67 [2019-12-26 20:51:20,606 INFO L226 Difference]: Without dead ends: 64 [2019-12-26 20:51:20,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=635, Invalid=1257, Unknown=0, NotChecked=0, Total=1892 [2019-12-26 20:51:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-26 20:51:20,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-12-26 20:51:20,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-26 20:51:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2019-12-26 20:51:20,610 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 27 [2019-12-26 20:51:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:20,610 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2019-12-26 20:51:20,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-26 20:51:20,611 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2019-12-26 20:51:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-26 20:51:20,611 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:20,611 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:20,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:20,815 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:20,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:20,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1697011851, now seen corresponding path program 39 times [2019-12-26 20:51:20,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:20,816 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541651178] [2019-12-26 20:51:20,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:20,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541651178] [2019-12-26 20:51:20,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533009737] [2019-12-26 20:51:20,973 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:21,049 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-12-26 20:51:21,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:21,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:51:21,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:21,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-26 20:51:21,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2019-12-26 20:51:21,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418560617] [2019-12-26 20:51:21,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-26 20:51:21,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:21,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-26 20:51:21,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:51:21,063 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand 13 states. [2019-12-26 20:51:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:21,097 INFO L93 Difference]: Finished difference Result 271 states and 497 transitions. [2019-12-26 20:51:21,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:51:21,097 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2019-12-26 20:51:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:21,098 INFO L225 Difference]: With dead ends: 271 [2019-12-26 20:51:21,098 INFO L226 Difference]: Without dead ends: 40 [2019-12-26 20:51:21,098 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:51:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-26 20:51:21,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-26 20:51:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-26 20:51:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 64 transitions. [2019-12-26 20:51:21,100 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 64 transitions. Word has length 28 [2019-12-26 20:51:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:21,101 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 64 transitions. [2019-12-26 20:51:21,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-26 20:51:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 64 transitions. [2019-12-26 20:51:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-26 20:51:21,101 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:21,101 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:21,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:21,302 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:21,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash -174254209, now seen corresponding path program 40 times [2019-12-26 20:51:21,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:21,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102409523] [2019-12-26 20:51:21,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:21,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102409523] [2019-12-26 20:51:21,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084259509] [2019-12-26 20:51:21,609 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:21,685 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:21,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:21,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:51:21,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:21,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-26 20:51:21,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [22] total 35 [2019-12-26 20:51:21,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085841581] [2019-12-26 20:51:21,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-26 20:51:21,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:21,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-26 20:51:21,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2019-12-26 20:51:21,938 INFO L87 Difference]: Start difference. First operand 40 states and 64 transitions. Second operand 13 states. [2019-12-26 20:51:21,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:21,963 INFO L93 Difference]: Finished difference Result 131 states and 179 transitions. [2019-12-26 20:51:21,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:51:21,963 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2019-12-26 20:51:21,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:21,964 INFO L225 Difference]: With dead ends: 131 [2019-12-26 20:51:21,964 INFO L226 Difference]: Without dead ends: 0 [2019-12-26 20:51:21,965 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2019-12-26 20:51:21,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-26 20:51:21,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-26 20:51:21,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-26 20:51:21,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-26 20:51:21,965 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2019-12-26 20:51:21,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:21,966 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-26 20:51:21,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-26 20:51:21,966 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-26 20:51:21,966 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-26 20:51:22,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:22,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.12 08:51:22 BasicIcfg [2019-12-26 20:51:22,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-26 20:51:22,173 INFO L168 Benchmark]: Toolchain (without parser) took 30433.91 ms. Allocated memory was 138.9 MB in the beginning and 393.2 MB in the end (delta: 254.3 MB). Free memory was 101.2 MB in the beginning and 126.5 MB in the end (delta: -25.4 MB). Peak memory consumption was 228.9 MB. Max. memory is 7.1 GB. [2019-12-26 20:51:22,173 INFO L168 Benchmark]: CDTParser took 1.40 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-12-26 20:51:22,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 647.68 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 100.7 MB in the beginning and 162.6 MB in the end (delta: -61.8 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2019-12-26 20:51:22,174 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.62 ms. Allocated memory is still 202.9 MB. Free memory was 162.6 MB in the beginning and 160.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-12-26 20:51:22,174 INFO L168 Benchmark]: Boogie Preprocessor took 49.10 ms. Allocated memory is still 202.9 MB. Free memory was 160.4 MB in the beginning and 159.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-26 20:51:22,174 INFO L168 Benchmark]: RCFGBuilder took 427.00 ms. Allocated memory is still 202.9 MB. Free memory was 159.1 MB in the beginning and 138.9 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2019-12-26 20:51:22,175 INFO L168 Benchmark]: TraceAbstraction took 29254.33 ms. Allocated memory was 202.9 MB in the beginning and 393.2 MB in the end (delta: 190.3 MB). Free memory was 138.9 MB in the beginning and 126.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 202.7 MB. Max. memory is 7.1 GB. [2019-12-26 20:51:22,177 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.40 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 647.68 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 100.7 MB in the beginning and 162.6 MB in the end (delta: -61.8 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 50.62 ms. Allocated memory is still 202.9 MB. Free memory was 162.6 MB in the beginning and 160.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.10 ms. Allocated memory is still 202.9 MB. Free memory was 160.4 MB in the beginning and 159.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 427.00 ms. Allocated memory is still 202.9 MB. Free memory was 159.1 MB in the beginning and 138.9 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29254.33 ms. Allocated memory was 202.9 MB in the beginning and 393.2 MB in the end (delta: 190.3 MB). Free memory was 138.9 MB in the beginning and 126.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 202.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 53 ProgramPointsBefore, 16 ProgramPointsAfterwards, 51 TransitionsBefore, 14 TransitionsAfterwards, 740 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 380 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 604 CheckedPairsTotal, 41 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Result: SAFE, OverallTime: 29.1s, OverallIterations: 42, TraceHistogramMax: 11, AutomataDifference: 10.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 537 SDtfs, 1333 SDslu, 1301 SDs, 0 SdLazy, 1695 SolverSat, 1565 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1587 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 949 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4904 ImplicationChecksByTransitivity, 12.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 42 MinimizatonAttempts, 285 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 1474 NumberOfCodeBlocks, 1473 NumberOfCodeBlocksAsserted, 189 NumberOfCheckSat, 1394 ConstructedInterpolants, 0 QuantifiedInterpolants, 86948 SizeOfPredicates, 378 NumberOfNonLiveVariables, 4709 ConjunctsInSsa, 586 ConjunctsInUnsatCore, 80 InterpolantComputations, 6 PerfectInterpolantSequences, 290/2860 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...