/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/fib_bench_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 10:46:39,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 10:46:39,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 10:46:39,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 10:46:39,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 10:46:39,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 10:46:39,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 10:46:39,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 10:46:39,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 10:46:39,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 10:46:39,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 10:46:39,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 10:46:39,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 10:46:39,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 10:46:39,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 10:46:39,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 10:46:39,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 10:46:39,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 10:46:39,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 10:46:39,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 10:46:39,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 10:46:39,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 10:46:39,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 10:46:39,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 10:46:39,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 10:46:39,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 10:46:39,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 10:46:39,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 10:46:39,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 10:46:39,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 10:46:39,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 10:46:39,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 10:46:39,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 10:46:39,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 10:46:39,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 10:46:39,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 10:46:39,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 10:46:39,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 10:46:39,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 10:46:39,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 10:46:39,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 10:46:39,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-16 10:46:39,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 10:46:39,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 10:46:39,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 10:46:39,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 10:46:39,518 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 10:46:39,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 10:46:39,518 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 10:46:39,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 10:46:39,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 10:46:39,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 10:46:39,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 10:46:39,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 10:46:39,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 10:46:39,519 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 10:46:39,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 10:46:39,520 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 10:46:39,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 10:46:39,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 10:46:39,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 10:46:39,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 10:46:39,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 10:46:39,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 10:46:39,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 10:46:39,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 10:46:39,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 10:46:39,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 10:46:39,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 10:46:39,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 10:46:39,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-16 10:46:39,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 10:46:39,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 10:46:39,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 10:46:39,866 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 10:46:39,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 10:46:39,868 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 10:46:39,869 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-10-16 10:46:39,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/597ad91ce/59c4da1915b045cebd4d0079b63e40b7/FLAGc296f46dd [2020-10-16 10:46:40,447 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 10:46:40,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-10-16 10:46:40,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/597ad91ce/59c4da1915b045cebd4d0079b63e40b7/FLAGc296f46dd [2020-10-16 10:46:40,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/597ad91ce/59c4da1915b045cebd4d0079b63e40b7 [2020-10-16 10:46:40,775 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 10:46:40,777 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 10:46:40,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 10:46:40,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 10:46:40,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 10:46:40,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:46:40" (1/1) ... [2020-10-16 10:46:40,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aec7e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:40, skipping insertion in model container [2020-10-16 10:46:40,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:46:40" (1/1) ... [2020-10-16 10:46:40,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 10:46:40,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 10:46:41,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:46:41,337 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 10:46:41,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:46:41,520 INFO L208 MainTranslator]: Completed translation [2020-10-16 10:46:41,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41 WrapperNode [2020-10-16 10:46:41,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 10:46:41,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 10:46:41,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 10:46:41,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 10:46:41,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 10:46:41,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 10:46:41,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 10:46:41,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 10:46:41,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 10:46:41,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 10:46:41,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 10:46:41,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 10:46:41,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 10:46:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 10:46:41,667 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 10:46:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 10:46:41,668 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 10:46:41,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 10:46:41,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 10:46:41,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 10:46:41,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 10:46:41,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 10:46:41,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 10:46:41,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 10:46:41,673 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 10:46:42,101 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 10:46:42,102 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 10:46:42,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:46:42 BoogieIcfgContainer [2020-10-16 10:46:42,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 10:46:42,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 10:46:42,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 10:46:42,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 10:46:42,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 10:46:40" (1/3) ... [2020-10-16 10:46:42,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa64a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:46:42, skipping insertion in model container [2020-10-16 10:46:42,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (2/3) ... [2020-10-16 10:46:42,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa64a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:46:42, skipping insertion in model container [2020-10-16 10:46:42,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:46:42" (3/3) ... [2020-10-16 10:46:42,113 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2020-10-16 10:46:42,126 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 10:46:42,126 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 10:46:42,134 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 10:46:42,135 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 10:46:42,161 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,161 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,161 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,162 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,162 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,163 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,163 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,163 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,164 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,164 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,164 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,165 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,165 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,165 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,165 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,166 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,166 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,166 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,166 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,167 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,167 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,167 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,167 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,168 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,168 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,168 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,168 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,169 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,169 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,169 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,172 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,173 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,173 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,173 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,174 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,174 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,178 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,179 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,179 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,179 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,180 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,180 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,185 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 10:46:42,196 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 10:46:42,214 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 10:46:42,214 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 10:46:42,214 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 10:46:42,214 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 10:46:42,214 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 10:46:42,215 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 10:46:42,215 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 10:46:42,215 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 10:46:42,226 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 10:46:42,229 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 10:46:42,232 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 10:46:42,234 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-16 10:46:42,273 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-16 10:46:42,273 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 10:46:42,279 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-16 10:46:42,281 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-16 10:46:43,312 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-16 10:46:43,412 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-16 10:46:43,412 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-16 10:46:43,420 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-16 10:46:43,433 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 10:46:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 10:46:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 10:46:43,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:43,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 10:46:43,445 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:43,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:43,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-16 10:46:43,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:43,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082488066] [2020-10-16 10:46:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:43,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082488066] [2020-10-16 10:46:43,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:43,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 10:46:43,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221672935] [2020-10-16 10:46:43,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 10:46:43,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:43,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 10:46:43,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 10:46:43,719 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 10:46:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:43,801 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-16 10:46:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 10:46:43,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 10:46:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:43,817 INFO L225 Difference]: With dead ends: 83 [2020-10-16 10:46:43,817 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 10:46:43,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 10:46:43,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-16 10:46:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:46:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-16 10:46:43,861 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-16 10:46:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:43,861 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-16 10:46:43,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 10:46:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-16 10:46:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 10:46:43,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:43,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:43,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 10:46:43,864 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:43,864 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-16 10:46:43,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:43,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840148774] [2020-10-16 10:46:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840148774] [2020-10-16 10:46:44,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:44,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 10:46:44,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755339811] [2020-10-16 10:46:44,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 10:46:44,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:44,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 10:46:44,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:44,025 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-16 10:46:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:44,084 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-16 10:46:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:44,085 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 10:46:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:44,087 INFO L225 Difference]: With dead ends: 80 [2020-10-16 10:46:44,087 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 10:46:44,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:46:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 10:46:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-16 10:46:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 10:46:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-16 10:46:44,099 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-16 10:46:44,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:44,100 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-16 10:46:44,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 10:46:44,100 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-16 10:46:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 10:46:44,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:44,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:44,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 10:46:44,104 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:44,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:44,105 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-16 10:46:44,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:44,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813091745] [2020-10-16 10:46:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813091745] [2020-10-16 10:46:44,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:44,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 10:46:44,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223437261] [2020-10-16 10:46:44,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 10:46:44,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:44,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 10:46:44,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:44,234 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-16 10:46:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:44,268 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-16 10:46:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 10:46:44,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 10:46:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:44,270 INFO L225 Difference]: With dead ends: 73 [2020-10-16 10:46:44,271 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 10:46:44,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 10:46:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-16 10:46:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:46:44,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-16 10:46:44,280 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-16 10:46:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:44,281 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-16 10:46:44,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 10:46:44,281 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-16 10:46:44,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 10:46:44,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:44,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:44,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 10:46:44,282 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:44,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:44,283 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-16 10:46:44,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:44,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259166966] [2020-10-16 10:46:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259166966] [2020-10-16 10:46:44,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:44,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 10:46:44,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341115571] [2020-10-16 10:46:44,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 10:46:44,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:44,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 10:46:44,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:44,341 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-16 10:46:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:44,406 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-16 10:46:44,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:44,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 10:46:44,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:44,409 INFO L225 Difference]: With dead ends: 86 [2020-10-16 10:46:44,409 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 10:46:44,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:46:44,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 10:46:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-16 10:46:44,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:46:44,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-16 10:46:44,419 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-16 10:46:44,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:44,419 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-16 10:46:44,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 10:46:44,419 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-16 10:46:44,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 10:46:44,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:44,421 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:44,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 10:46:44,421 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:44,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:44,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-16 10:46:44,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:44,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375619542] [2020-10-16 10:46:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375619542] [2020-10-16 10:46:44,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148125038] [2020-10-16 10:46:44,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:44,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:44,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:44,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:46:44,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:44,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:44,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-16 10:46:44,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036921862] [2020-10-16 10:46:44,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:46:44,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:44,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:46:44,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:46:44,665 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-16 10:46:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:44,735 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-16 10:46:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:44,735 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-16 10:46:44,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:44,737 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:46:44,737 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 10:46:44,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:44,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 10:46:44,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-16 10:46:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 10:46:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-16 10:46:44,746 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-16 10:46:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:44,747 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-16 10:46:44,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:46:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-16 10:46:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 10:46:44,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:44,748 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:44,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:44,963 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:44,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:44,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-16 10:46:44,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:44,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662000264] [2020-10-16 10:46:44,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662000264] [2020-10-16 10:46:45,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811091521] [2020-10-16 10:46:45,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:45,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:45,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:46:45,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:45,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 10:46:45,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911634702] [2020-10-16 10:46:45,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:46:45,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:45,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:46:45,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:45,184 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-16 10:46:45,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:45,214 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-16 10:46:45,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 10:46:45,214 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 10:46:45,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:45,215 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:46:45,216 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 10:46:45,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:45,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 10:46:45,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-16 10:46:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:46:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-16 10:46:45,224 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-16 10:46:45,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:45,224 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-16 10:46:45,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:46:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-16 10:46:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 10:46:45,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:45,225 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:45,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:45,440 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:45,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:45,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-16 10:46:45,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:45,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234713377] [2020-10-16 10:46:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234713377] [2020-10-16 10:46:45,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067317665] [2020-10-16 10:46:45,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:45,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:45,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:45,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:46:45,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:45,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 10:46:45,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366887003] [2020-10-16 10:46:45,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:46:45,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:45,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:46:45,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:45,713 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-16 10:46:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:45,771 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-16 10:46:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:45,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 10:46:45,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:45,772 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:46:45,773 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 10:46:45,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:46:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 10:46:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-16 10:46:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:46:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-16 10:46:45,781 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-16 10:46:45,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:45,781 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-16 10:46:45,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:46:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-16 10:46:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 10:46:45,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:45,782 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:45,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:45,996 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:45,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-16 10:46:45,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:45,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535714126] [2020-10-16 10:46:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535714126] [2020-10-16 10:46:46,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456299878] [2020-10-16 10:46:46,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:46,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:46,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:46,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:46:46,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:46,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:46,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 10:46:46,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645777710] [2020-10-16 10:46:46,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:46:46,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:46,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:46:46,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:46,192 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-16 10:46:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:46,287 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-16 10:46:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:46,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 10:46:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:46,289 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:46:46,289 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:46:46,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:46:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:46:46,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-16 10:46:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 10:46:46,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-16 10:46:46,296 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-16 10:46:46,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:46,297 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-16 10:46:46,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:46:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-16 10:46:46,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:46,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:46,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:46,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:46,513 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:46,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-16 10:46:46,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:46,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267364316] [2020-10-16 10:46:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267364316] [2020-10-16 10:46:46,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:46,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:46:46,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208858498] [2020-10-16 10:46:46,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:46:46,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:46,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:46:46,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:46,576 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-16 10:46:46,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:46,613 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-16 10:46:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 10:46:46,615 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:46:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:46,617 INFO L225 Difference]: With dead ends: 92 [2020-10-16 10:46:46,617 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:46:46,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:46:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-16 10:46:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 10:46:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-16 10:46:46,625 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-16 10:46:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:46,626 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-16 10:46:46,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:46:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-16 10:46:46,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:46,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:46,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:46,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 10:46:46,628 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:46,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-16 10:46:46,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:46,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715429810] [2020-10-16 10:46:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715429810] [2020-10-16 10:46:46,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:46,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:46:46,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245877478] [2020-10-16 10:46:46,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:46:46,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:46,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:46:46,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:46,713 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-16 10:46:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:46,778 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-16 10:46:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:46,779 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:46:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:46,780 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:46:46,780 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:46:46,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:46:46,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:46:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-16 10:46:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 10:46:46,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-16 10:46:46,794 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-16 10:46:46,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:46,795 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-16 10:46:46,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:46:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-16 10:46:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:46,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:46,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:46,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 10:46:46,802 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:46,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:46,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-16 10:46:46,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:46,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504641759] [2020-10-16 10:46:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504641759] [2020-10-16 10:46:46,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:46,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:46:46,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478096698] [2020-10-16 10:46:46,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:46:46,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:46,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:46:46,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:46,882 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-16 10:46:46,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:46,959 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 10:46:46,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:46,959 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:46:46,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:46,961 INFO L225 Difference]: With dead ends: 105 [2020-10-16 10:46:46,961 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:46:46,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:46:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 10:46:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:46:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-16 10:46:46,966 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-16 10:46:46,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:46,966 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-16 10:46:46,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:46:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-16 10:46:46,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:46,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:46,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:46,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-16 10:46:46,968 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:46,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-16 10:46:46,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:46,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451649832] [2020-10-16 10:46:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:47,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451649832] [2020-10-16 10:46:47,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:47,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:46:47,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709908326] [2020-10-16 10:46:47,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:46:47,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:47,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:46:47,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:47,019 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-16 10:46:47,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:47,089 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 10:46:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:47,090 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:46:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:47,091 INFO L225 Difference]: With dead ends: 105 [2020-10-16 10:46:47,091 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:46:47,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:47,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:46:47,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 10:46:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:46:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-16 10:46:47,096 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-16 10:46:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:47,096 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-16 10:46:47,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:46:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-16 10:46:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:47,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:47,097 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:47,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-16 10:46:47,098 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:47,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-16 10:46:47,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:47,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766519050] [2020-10-16 10:46:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:47,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766519050] [2020-10-16 10:46:47,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241941701] [2020-10-16 10:46:47,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:47,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:47,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:47,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:47,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:47,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:47,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:47,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-16 10:46:47,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089687919] [2020-10-16 10:46:47,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:46:47,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:46:47,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:46:47,335 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-16 10:46:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:47,430 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-16 10:46:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:47,431 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-16 10:46:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:47,432 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:46:47,432 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:46:47,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:46:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:46:47,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-16 10:46:47,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 10:46:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-16 10:46:47,438 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-16 10:46:47,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:47,438 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-16 10:46:47,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:46:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-16 10:46:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:47,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:47,439 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:47,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 10:46:47,651 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:47,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:47,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-16 10:46:47,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:47,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154358901] [2020-10-16 10:46:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:47,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154358901] [2020-10-16 10:46:47,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786055996] [2020-10-16 10:46:47,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:47,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:46:47,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:47,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:47,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:47,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27672587] [2020-10-16 10:46:47,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:47,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:47,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:47,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:47,880 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-16 10:46:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:47,931 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 10:46:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:47,932 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 10:46:47,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:47,933 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:46:47,934 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 10:46:47,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:47,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 10:46:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-16 10:46:47,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 10:46:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-16 10:46:47,939 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-16 10:46:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:47,940 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-16 10:46:47,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-16 10:46:47,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:47,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:47,941 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:48,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:48,152 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:48,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:48,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-16 10:46:48,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:48,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390777187] [2020-10-16 10:46:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:48,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390777187] [2020-10-16 10:46:48,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529845105] [2020-10-16 10:46:48,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:48,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:48,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:48,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:48,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:48,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020586911] [2020-10-16 10:46:48,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:48,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:48,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:48,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:48,381 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-16 10:46:48,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:48,439 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-16 10:46:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:48,440 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 10:46:48,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:48,442 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:46:48,442 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:46:48,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:46:48,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:46:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-16 10:46:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:46:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-16 10:46:48,448 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-16 10:46:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:48,448 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-16 10:46:48,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-16 10:46:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:48,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:48,449 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:48,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 10:46:48,661 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:48,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-16 10:46:48,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:48,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140258861] [2020-10-16 10:46:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:48,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140258861] [2020-10-16 10:46:48,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935152870] [2020-10-16 10:46:48,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:48,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:48,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:48,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:48,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:48,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:48,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:48,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4107997] [2020-10-16 10:46:48,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:48,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:48,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:48,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:48,868 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-16 10:46:48,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:48,945 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-16 10:46:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:48,946 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 10:46:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:48,948 INFO L225 Difference]: With dead ends: 115 [2020-10-16 10:46:48,948 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 10:46:48,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 10:46:48,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-16 10:46:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 10:46:48,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-16 10:46:48,953 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-16 10:46:48,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:48,954 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-16 10:46:48,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:48,954 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-16 10:46:48,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:48,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:48,955 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:49,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 10:46:49,166 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:49,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:49,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-16 10:46:49,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:49,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703097098] [2020-10-16 10:46:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:49,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703097098] [2020-10-16 10:46:49,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985209327] [2020-10-16 10:46:49,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:49,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:49,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:49,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:49,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:49,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:49,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:49,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:49,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618045728] [2020-10-16 10:46:49,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:49,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:49,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:49,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:49,351 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-16 10:46:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:49,486 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-16 10:46:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:49,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 10:46:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:49,488 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:46:49,488 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:46:49,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:46:49,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:46:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-16 10:46:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 10:46:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-16 10:46:49,494 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-16 10:46:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:49,494 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-16 10:46:49,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:49,494 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-16 10:46:49,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:49,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:49,496 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:49,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 10:46:49,696 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:49,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:49,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-16 10:46:49,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:49,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415589512] [2020-10-16 10:46:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:49,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415589512] [2020-10-16 10:46:49,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129022419] [2020-10-16 10:46:49,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:49,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:49,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:49,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:49,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:49,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382148353] [2020-10-16 10:46:49,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:49,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:49,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:49,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:49,913 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-16 10:46:49,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:49,957 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-16 10:46:49,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:49,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:49,959 INFO L225 Difference]: With dead ends: 113 [2020-10-16 10:46:49,959 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:46:49,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:46:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-16 10:46:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-16 10:46:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-16 10:46:49,963 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-16 10:46:49,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:49,964 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-16 10:46:49,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-16 10:46:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:49,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:49,964 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:50,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 10:46:50,174 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:50,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:50,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-16 10:46:50,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:50,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859139724] [2020-10-16 10:46:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:50,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859139724] [2020-10-16 10:46:50,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902164433] [2020-10-16 10:46:50,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:50,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:46:50,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:50,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:50,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:50,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:50,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:50,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826487379] [2020-10-16 10:46:50,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:50,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:50,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:50,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:50,364 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-16 10:46:50,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:50,435 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-16 10:46:50,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:50,436 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:50,437 INFO L225 Difference]: With dead ends: 118 [2020-10-16 10:46:50,437 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 10:46:50,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:50,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 10:46:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-16 10:46:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-16 10:46:50,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-16 10:46:50,442 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-16 10:46:50,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:50,442 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-16 10:46:50,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-16 10:46:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:50,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:50,443 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:50,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:50,655 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:50,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:50,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-16 10:46:50,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:50,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854047287] [2020-10-16 10:46:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:50,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854047287] [2020-10-16 10:46:50,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669671963] [2020-10-16 10:46:50,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:50,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:50,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:50,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:50,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:50,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312169004] [2020-10-16 10:46:50,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:50,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:50,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:50,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:50,857 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-16 10:46:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:50,934 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-16 10:46:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:50,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:50,939 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:46:50,939 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:46:50,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:50,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:46:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-16 10:46:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 10:46:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-16 10:46:50,944 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-16 10:46:50,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:50,944 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-16 10:46:50,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-16 10:46:50,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:50,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:50,945 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:51,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:51,157 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-16 10:46:51,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:51,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162132490] [2020-10-16 10:46:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:51,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162132490] [2020-10-16 10:46:51,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329469810] [2020-10-16 10:46:51,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:51,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:51,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:51,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:51,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:51,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:51,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:51,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496279845] [2020-10-16 10:46:51,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:51,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:51,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:51,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:51,369 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-16 10:46:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:51,422 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-16 10:46:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:51,423 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:51,424 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:46:51,424 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 10:46:51,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:46:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 10:46:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-16 10:46:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-16 10:46:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-16 10:46:51,429 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-16 10:46:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:51,429 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-16 10:46:51,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-16 10:46:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:51,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:51,430 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:51,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 10:46:51,641 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:51,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:51,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-16 10:46:51,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:51,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629303155] [2020-10-16 10:46:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:51,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629303155] [2020-10-16 10:46:51,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337991542] [2020-10-16 10:46:51,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:51,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:51,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:51,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:51,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:51,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:51,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:51,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242226042] [2020-10-16 10:46:51,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:51,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:51,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:51,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:51,876 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-16 10:46:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:51,960 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-16 10:46:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:46:51,960 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:51,961 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:46:51,962 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:46:51,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:46:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:46:51,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-16 10:46:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 10:46:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-16 10:46:51,966 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-16 10:46:51,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:51,967 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-16 10:46:51,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-16 10:46:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:51,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:51,968 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:52,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:52,178 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:52,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-16 10:46:52,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:52,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241247882] [2020-10-16 10:46:52,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:52,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241247882] [2020-10-16 10:46:52,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278017360] [2020-10-16 10:46:52,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:52,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:52,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:52,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:52,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:52,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:52,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:52,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875258047] [2020-10-16 10:46:52,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:52,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:52,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:52,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:52,373 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-16 10:46:52,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:52,447 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 10:46:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:52,447 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:52,448 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:46:52,449 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:46:52,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:46:52,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-16 10:46:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-16 10:46:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-16 10:46:52,454 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-16 10:46:52,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:52,454 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-16 10:46:52,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:52,455 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-16 10:46:52,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:52,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:52,457 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:52,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 10:46:52,667 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:52,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:52,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-16 10:46:52,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:52,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037159458] [2020-10-16 10:46:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:52,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037159458] [2020-10-16 10:46:52,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958289937] [2020-10-16 10:46:52,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:52,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:52,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:52,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:52,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:52,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:52,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:52,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:52,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384519809] [2020-10-16 10:46:52,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:52,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:52,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:52,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:52,925 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-16 10:46:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:53,106 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-16 10:46:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:53,107 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:53,108 INFO L225 Difference]: With dead ends: 133 [2020-10-16 10:46:53,108 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:46:53,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:46:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:46:53,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-16 10:46:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-16 10:46:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-16 10:46:53,112 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-16 10:46:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:53,112 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-16 10:46:53,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-16 10:46:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:53,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:53,113 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:53,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:53,322 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:53,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-16 10:46:53,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:53,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495771891] [2020-10-16 10:46:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:53,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495771891] [2020-10-16 10:46:53,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516093079] [2020-10-16 10:46:53,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:53,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:46:53,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:53,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:53,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:53,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:53,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:53,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405817483] [2020-10-16 10:46:53,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:53,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:53,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:53,535 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-16 10:46:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:53,640 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-16 10:46:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:46:53,641 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:53,642 INFO L225 Difference]: With dead ends: 127 [2020-10-16 10:46:53,642 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 10:46:53,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:46:53,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 10:46:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-16 10:46:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 10:46:53,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 10:46:53,668 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 10:46:53,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:53,668 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 10:46:53,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 10:46:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:53,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:53,669 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:53,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 10:46:53,870 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:53,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:53,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-16 10:46:53,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:53,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109174346] [2020-10-16 10:46:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:53,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109174346] [2020-10-16 10:46:53,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588062825] [2020-10-16 10:46:53,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:53,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:53,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:54,011 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:54,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:54,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:54,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683072058] [2020-10-16 10:46:54,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:54,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:54,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:54,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:54,036 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 10:46:54,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:54,253 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-16 10:46:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:46:54,253 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:54,254 INFO L225 Difference]: With dead ends: 141 [2020-10-16 10:46:54,255 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 10:46:54,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:46:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 10:46:54,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-16 10:46:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 10:46:54,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 10:46:54,260 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 10:46:54,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:54,260 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 10:46:54,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:54,260 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 10:46:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:54,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:54,262 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:54,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 10:46:54,463 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:54,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:54,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-16 10:46:54,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:54,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353522431] [2020-10-16 10:46:54,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:54,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353522431] [2020-10-16 10:46:54,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77610786] [2020-10-16 10:46:54,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:54,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:54,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:54,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:54,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:54,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:54,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:54,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123516556] [2020-10-16 10:46:54,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:54,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:54,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:54,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:54,674 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 10:46:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:54,812 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-16 10:46:54,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:54,812 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:54,813 INFO L225 Difference]: With dead ends: 136 [2020-10-16 10:46:54,813 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 10:46:54,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:46:54,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 10:46:54,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-16 10:46:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 10:46:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-16 10:46:54,817 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-16 10:46:54,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:54,819 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-16 10:46:54,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-16 10:46:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:54,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:54,819 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:55,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 10:46:55,030 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:55,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:55,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-16 10:46:55,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:55,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203325646] [2020-10-16 10:46:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:55,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203325646] [2020-10-16 10:46:55,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250952585] [2020-10-16 10:46:55,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:55,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:55,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:55,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:55,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:55,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:55,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:55,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751379408] [2020-10-16 10:46:55,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:55,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:55,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:55,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:55,203 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-16 10:46:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:55,298 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-16 10:46:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:46:55,300 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:55,301 INFO L225 Difference]: With dead ends: 130 [2020-10-16 10:46:55,301 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:46:55,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:46:55,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:46:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-16 10:46:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 10:46:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 10:46:55,304 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 10:46:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:55,305 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 10:46:55,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 10:46:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:55,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:55,306 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:55,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 10:46:55,515 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:55,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-16 10:46:55,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:55,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003604400] [2020-10-16 10:46:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:55,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003604400] [2020-10-16 10:46:55,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772184919] [2020-10-16 10:46:55,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:55,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:55,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:55,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:55,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:55,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:55,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:55,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875158064] [2020-10-16 10:46:55,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:55,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:55,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:55,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:55,708 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 10:46:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:55,850 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-16 10:46:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:46:55,850 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:55,851 INFO L225 Difference]: With dead ends: 131 [2020-10-16 10:46:55,851 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 10:46:55,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:46:55,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 10:46:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-16 10:46:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 10:46:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 10:46:55,857 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 10:46:55,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:55,857 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 10:46:55,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:55,858 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 10:46:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:55,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:55,858 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:56,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 10:46:56,059 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:56,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:56,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-16 10:46:56,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:56,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228978886] [2020-10-16 10:46:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:56,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228978886] [2020-10-16 10:46:56,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307345070] [2020-10-16 10:46:56,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:56,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:56,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:56,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:56,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:56,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:56,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:56,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:56,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377307465] [2020-10-16 10:46:56,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:56,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:56,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:56,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:56,223 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 10:46:56,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:56,345 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-16 10:46:56,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:56,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:56,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:56,347 INFO L225 Difference]: With dead ends: 131 [2020-10-16 10:46:56,347 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 10:46:56,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:46:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 10:46:56,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-16 10:46:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 10:46:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 10:46:56,351 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 10:46:56,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:56,351 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 10:46:56,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:56,351 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 10:46:56,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:56,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:56,352 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:56,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:56,562 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:56,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:56,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-16 10:46:56,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:56,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522810463] [2020-10-16 10:46:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:56,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522810463] [2020-10-16 10:46:56,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382262558] [2020-10-16 10:46:56,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:56,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:46:56,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:56,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:56,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:56,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:56,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:56,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:56,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956446990] [2020-10-16 10:46:56,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:56,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:56,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:56,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:56,714 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 10:46:56,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:56,935 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-16 10:46:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:46:56,936 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:56,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:56,938 INFO L225 Difference]: With dead ends: 145 [2020-10-16 10:46:56,938 INFO L226 Difference]: Without dead ends: 140 [2020-10-16 10:46:56,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:46:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-16 10:46:56,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-16 10:46:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 10:46:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 10:46:56,943 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 10:46:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:56,943 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 10:46:56,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 10:46:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:56,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:56,944 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:57,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-16 10:46:57,148 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-16 10:46:57,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:57,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519607125] [2020-10-16 10:46:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:57,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519607125] [2020-10-16 10:46:57,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086413973] [2020-10-16 10:46:57,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:57,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:57,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:57,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:57,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:57,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:57,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582383205] [2020-10-16 10:46:57,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:57,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:57,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:57,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:57,346 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 10:46:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:57,516 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-16 10:46:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:57,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:57,518 INFO L225 Difference]: With dead ends: 135 [2020-10-16 10:46:57,518 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 10:46:57,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:46:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 10:46:57,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-16 10:46:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 10:46:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-16 10:46:57,523 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-16 10:46:57,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:57,523 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-16 10:46:57,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:57,523 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-16 10:46:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:57,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:57,524 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:57,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:57,736 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:57,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:57,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-16 10:46:57,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:57,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769375171] [2020-10-16 10:46:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:57,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769375171] [2020-10-16 10:46:57,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218859905] [2020-10-16 10:46:57,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:57,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:57,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:57,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:46:57,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:57,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:57,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:57,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-16 10:46:57,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956544340] [2020-10-16 10:46:57,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:46:57,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:57,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:46:57,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:46:57,959 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-16 10:46:58,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:58,076 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-16 10:46:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:46:58,076 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-16 10:46:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:58,078 INFO L225 Difference]: With dead ends: 143 [2020-10-16 10:46:58,078 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 10:46:58,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:46:58,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 10:46:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-16 10:46:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-16 10:46:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-16 10:46:58,083 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-16 10:46:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:58,083 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-16 10:46:58,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:46:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-16 10:46:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:58,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:58,084 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:58,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-16 10:46:58,296 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:58,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:58,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-16 10:46:58,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:58,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070957624] [2020-10-16 10:46:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:58,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070957624] [2020-10-16 10:46:58,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134388933] [2020-10-16 10:46:58,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:58,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:58,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:46:58,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:58,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:58,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:46:58,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075783763] [2020-10-16 10:46:58,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:46:58,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:58,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:46:58,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:58,541 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-16 10:46:58,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:58,585 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-16 10:46:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:58,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:46:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:58,588 INFO L225 Difference]: With dead ends: 132 [2020-10-16 10:46:58,588 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 10:46:58,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 10:46:58,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-16 10:46:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 10:46:58,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 10:46:58,592 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 10:46:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:58,593 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 10:46:58,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:46:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 10:46:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:58,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:58,594 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:58,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 10:46:58,804 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:58,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:58,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-16 10:46:58,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:58,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046449679] [2020-10-16 10:46:58,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:58,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046449679] [2020-10-16 10:46:58,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594173657] [2020-10-16 10:46:58,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:58,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:46:58,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:58,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:46:58,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:59,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:59,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:46:59,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047743256] [2020-10-16 10:46:59,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:46:59,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:59,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:46:59,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:59,057 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 10:46:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:59,135 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-16 10:46:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:59,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:46:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:59,138 INFO L225 Difference]: With dead ends: 143 [2020-10-16 10:46:59,138 INFO L226 Difference]: Without dead ends: 140 [2020-10-16 10:46:59,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:46:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-16 10:46:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-16 10:46:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 10:46:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 10:46:59,144 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 10:46:59,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:59,145 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 10:46:59,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:46:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 10:46:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:59,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:59,146 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:59,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 10:46:59,360 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:59,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:59,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-16 10:46:59,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:59,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284304277] [2020-10-16 10:46:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:59,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284304277] [2020-10-16 10:46:59,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011252425] [2020-10-16 10:46:59,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:59,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:46:59,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:59,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:46:59,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:59,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:59,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:46:59,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371134278] [2020-10-16 10:46:59,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:46:59,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:59,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:46:59,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:59,611 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 10:46:59,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:59,681 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-16 10:46:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:46:59,681 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:46:59,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:59,683 INFO L225 Difference]: With dead ends: 142 [2020-10-16 10:46:59,683 INFO L226 Difference]: Without dead ends: 139 [2020-10-16 10:46:59,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:46:59,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-16 10:46:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-16 10:46:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-16 10:46:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-16 10:46:59,687 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-16 10:46:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:59,687 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-16 10:46:59,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:46:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-16 10:46:59,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:59,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:59,688 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:59,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 10:46:59,899 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:59,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:59,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-16 10:46:59,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:59,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540419013] [2020-10-16 10:46:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:59,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540419013] [2020-10-16 10:46:59,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143644844] [2020-10-16 10:46:59,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:00,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:00,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:00,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012010927] [2020-10-16 10:47:00,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:00,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:00,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:00,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:00,118 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-16 10:47:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:00,215 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-16 10:47:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:00,216 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:47:00,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:00,217 INFO L225 Difference]: With dead ends: 141 [2020-10-16 10:47:00,217 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 10:47:00,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:00,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 10:47:00,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-16 10:47:00,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 10:47:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-16 10:47:00,221 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-16 10:47:00,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:00,221 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-16 10:47:00,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:00,221 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-16 10:47:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:47:00,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:00,222 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:00,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 10:47:00,431 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:00,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-16 10:47:00,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:00,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350346795] [2020-10-16 10:47:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:00,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350346795] [2020-10-16 10:47:00,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047380409] [2020-10-16 10:47:00,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:00,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:00,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:00,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:00,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:00,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:00,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:00,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:00,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565054988] [2020-10-16 10:47:00,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:00,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:00,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:00,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:00,632 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-16 10:47:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:00,784 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 10:47:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:00,785 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:47:00,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:00,787 INFO L225 Difference]: With dead ends: 150 [2020-10-16 10:47:00,787 INFO L226 Difference]: Without dead ends: 144 [2020-10-16 10:47:00,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:00,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-16 10:47:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-16 10:47:00,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-16 10:47:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-16 10:47:00,791 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-16 10:47:00,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:00,791 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-16 10:47:00,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-16 10:47:00,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:00,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:00,792 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:01,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:01,004 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:01,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:01,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-16 10:47:01,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:01,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803015190] [2020-10-16 10:47:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:01,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803015190] [2020-10-16 10:47:01,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597302414] [2020-10-16 10:47:01,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:01,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:01,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:01,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:01,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:01,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:01,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:01,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946745441] [2020-10-16 10:47:01,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:01,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:01,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:01,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:01,222 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-16 10:47:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:01,272 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-16 10:47:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:47:01,273 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:01,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:01,274 INFO L225 Difference]: With dead ends: 138 [2020-10-16 10:47:01,274 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 10:47:01,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:01,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 10:47:01,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-16 10:47:01,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-16 10:47:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-16 10:47:01,279 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-16 10:47:01,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:01,279 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-16 10:47:01,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-16 10:47:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:01,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:01,280 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:01,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 10:47:01,490 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:01,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-16 10:47:01,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:01,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258496408] [2020-10-16 10:47:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:01,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258496408] [2020-10-16 10:47:01,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72903128] [2020-10-16 10:47:01,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:01,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:01,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:01,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:01,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:01,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:01,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:01,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783983254] [2020-10-16 10:47:01,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:01,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:01,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:01,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:01,704 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-16 10:47:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:01,809 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-16 10:47:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:47:01,809 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:01,811 INFO L225 Difference]: With dead ends: 145 [2020-10-16 10:47:01,811 INFO L226 Difference]: Without dead ends: 143 [2020-10-16 10:47:01,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:01,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-16 10:47:01,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-16 10:47:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-16 10:47:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-16 10:47:01,815 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-16 10:47:01,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:01,815 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-16 10:47:01,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-16 10:47:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:01,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:01,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:02,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 10:47:02,028 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:02,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-16 10:47:02,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:02,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916484581] [2020-10-16 10:47:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:02,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916484581] [2020-10-16 10:47:02,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434493616] [2020-10-16 10:47:02,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:02,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:02,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:02,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:02,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:02,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:02,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:02,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782658184] [2020-10-16 10:47:02,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:02,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:02,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:02,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:02,234 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-16 10:47:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:02,363 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 10:47:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:02,364 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:02,365 INFO L225 Difference]: With dead ends: 150 [2020-10-16 10:47:02,365 INFO L226 Difference]: Without dead ends: 148 [2020-10-16 10:47:02,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:02,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-16 10:47:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-16 10:47:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-16 10:47:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-16 10:47:02,371 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-16 10:47:02,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:02,371 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-16 10:47:02,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:02,371 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-16 10:47:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:02,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:02,372 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:02,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:02,573 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:02,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-16 10:47:02,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:02,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947062424] [2020-10-16 10:47:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:02,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947062424] [2020-10-16 10:47:02,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859519944] [2020-10-16 10:47:02,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:02,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:02,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:02,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:02,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:02,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:02,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:02,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984748280] [2020-10-16 10:47:02,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:02,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:02,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:02,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:02,785 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-16 10:47:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:02,893 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-16 10:47:02,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:02,893 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:02,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:02,894 INFO L225 Difference]: With dead ends: 148 [2020-10-16 10:47:02,895 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 10:47:02,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:02,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 10:47:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-16 10:47:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 10:47:02,899 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 10:47:02,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:02,899 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 10:47:02,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:02,899 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 10:47:02,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:02,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:02,900 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:03,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 10:47:03,109 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:03,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-16 10:47:03,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:03,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866094687] [2020-10-16 10:47:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:03,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866094687] [2020-10-16 10:47:03,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355519062] [2020-10-16 10:47:03,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:03,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:03,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:03,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:03,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:03,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:03,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:03,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949813457] [2020-10-16 10:47:03,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:03,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:03,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:03,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:03,310 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 10:47:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:03,442 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-16 10:47:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:03,443 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:03,444 INFO L225 Difference]: With dead ends: 149 [2020-10-16 10:47:03,444 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 10:47:03,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 10:47:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-16 10:47:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-16 10:47:03,448 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-16 10:47:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:03,449 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-16 10:47:03,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:03,449 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-16 10:47:03,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:03,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:03,450 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:03,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:03,655 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-16 10:47:03,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:03,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064054068] [2020-10-16 10:47:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:03,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064054068] [2020-10-16 10:47:03,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049815077] [2020-10-16 10:47:03,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:03,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:03,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:03,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:03,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:03,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568441917] [2020-10-16 10:47:03,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:03,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:03,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:03,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:03,881 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-16 10:47:03,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:03,934 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-16 10:47:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:47:03,934 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:03,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:03,935 INFO L225 Difference]: With dead ends: 152 [2020-10-16 10:47:03,936 INFO L226 Difference]: Without dead ends: 150 [2020-10-16 10:47:03,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:47:03,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-16 10:47:03,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-16 10:47:03,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 10:47:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-16 10:47:03,940 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-16 10:47:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:03,940 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-16 10:47:03,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-16 10:47:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:03,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:03,942 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:04,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 10:47:04,152 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:04,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:04,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-16 10:47:04,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:04,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377751562] [2020-10-16 10:47:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:04,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377751562] [2020-10-16 10:47:04,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143890639] [2020-10-16 10:47:04,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:04,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:04,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:04,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:04,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:04,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:04,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:04,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160902983] [2020-10-16 10:47:04,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:04,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:04,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:04,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:04,428 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-16 10:47:04,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:04,562 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-16 10:47:04,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:04,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:04,564 INFO L225 Difference]: With dead ends: 153 [2020-10-16 10:47:04,565 INFO L226 Difference]: Without dead ends: 151 [2020-10-16 10:47:04,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:04,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-16 10:47:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-16 10:47:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 10:47:04,568 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 10:47:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:04,568 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 10:47:04,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 10:47:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:04,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:04,569 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:04,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-16 10:47:04,770 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:04,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-16 10:47:04,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:04,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794686112] [2020-10-16 10:47:04,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:04,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794686112] [2020-10-16 10:47:04,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026898233] [2020-10-16 10:47:04,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:04,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:04,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:04,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:04,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:04,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:04,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:04,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506555837] [2020-10-16 10:47:04,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:04,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:04,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:04,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:04,965 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 10:47:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:05,112 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 10:47:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:05,112 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:05,114 INFO L225 Difference]: With dead ends: 156 [2020-10-16 10:47:05,114 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 10:47:05,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 10:47:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-16 10:47:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 10:47:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-16 10:47:05,119 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-16 10:47:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:05,120 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-16 10:47:05,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-16 10:47:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:05,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:05,120 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:05,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 10:47:05,332 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:05,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-16 10:47:05,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:05,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054802765] [2020-10-16 10:47:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:05,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054802765] [2020-10-16 10:47:05,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716994617] [2020-10-16 10:47:05,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:05,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:05,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:05,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:05,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:05,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:05,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:05,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87705083] [2020-10-16 10:47:05,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:05,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:05,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:05,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:05,537 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-16 10:47:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:05,617 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-16 10:47:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:05,617 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:05,619 INFO L225 Difference]: With dead ends: 148 [2020-10-16 10:47:05,619 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 10:47:05,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 10:47:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-16 10:47:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 10:47:05,623 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 10:47:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:05,624 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 10:47:05,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:05,624 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 10:47:05,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:05,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:05,625 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:05,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-16 10:47:05,835 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:05,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:05,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-16 10:47:05,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:05,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293570722] [2020-10-16 10:47:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:05,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293570722] [2020-10-16 10:47:05,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159442664] [2020-10-16 10:47:05,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:05,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:05,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:05,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:05,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:06,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:06,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:06,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747162476] [2020-10-16 10:47:06,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:06,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:06,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:06,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:06,071 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 10:47:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:06,231 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-16 10:47:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:06,231 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:06,232 INFO L225 Difference]: With dead ends: 157 [2020-10-16 10:47:06,232 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 10:47:06,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 10:47:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-16 10:47:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-16 10:47:06,237 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-16 10:47:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:06,237 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-16 10:47:06,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-16 10:47:06,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:06,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:06,238 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:06,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:06,441 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:06,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-16 10:47:06,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:06,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009028920] [2020-10-16 10:47:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:06,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009028920] [2020-10-16 10:47:06,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578953964] [2020-10-16 10:47:06,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:06,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:06,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:06,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:06,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:06,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:06,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:06,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058464819] [2020-10-16 10:47:06,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:06,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:06,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:06,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:06,626 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-10-16 10:47:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:06,742 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-16 10:47:06,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:06,742 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:06,744 INFO L225 Difference]: With dead ends: 149 [2020-10-16 10:47:06,744 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 10:47:06,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:06,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 10:47:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-16 10:47:06,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 10:47:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 10:47:06,748 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 10:47:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:06,748 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 10:47:06,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:06,748 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 10:47:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:06,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:06,749 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:06,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 10:47:06,949 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:06,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-16 10:47:06,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:06,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683364007] [2020-10-16 10:47:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:07,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683364007] [2020-10-16 10:47:07,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226814998] [2020-10-16 10:47:07,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:07,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:07,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:07,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:07,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:07,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:07,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176221180] [2020-10-16 10:47:07,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:07,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:07,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:07,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:07,165 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 10:47:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:07,414 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-16 10:47:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:07,414 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:07,416 INFO L225 Difference]: With dead ends: 164 [2020-10-16 10:47:07,416 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 10:47:07,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:07,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 10:47:07,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 10:47:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 10:47:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-16 10:47:07,420 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-16 10:47:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:07,420 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-16 10:47:07,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:07,420 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-16 10:47:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:07,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:07,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:07,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 10:47:07,632 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:07,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:07,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-16 10:47:07,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:07,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140573848] [2020-10-16 10:47:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:07,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140573848] [2020-10-16 10:47:07,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788994202] [2020-10-16 10:47:07,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:07,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:07,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:07,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:07,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:07,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:07,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:07,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293012730] [2020-10-16 10:47:07,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:07,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:07,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:07,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:07,833 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-16 10:47:08,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:08,005 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 10:47:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:08,005 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:08,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:08,007 INFO L225 Difference]: With dead ends: 156 [2020-10-16 10:47:08,007 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 10:47:08,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 10:47:08,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-16 10:47:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 10:47:08,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 10:47:08,010 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 10:47:08,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:08,010 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 10:47:08,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:08,010 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 10:47:08,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:08,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:08,011 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:08,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:08,212 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:08,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:08,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-16 10:47:08,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:08,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417422839] [2020-10-16 10:47:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:08,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417422839] [2020-10-16 10:47:08,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896126327] [2020-10-16 10:47:08,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:08,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:08,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:08,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:08,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:08,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:08,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:08,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:08,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841282951] [2020-10-16 10:47:08,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:08,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:08,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:08,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:08,478 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 10:47:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:08,928 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-16 10:47:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:47:08,929 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:08,930 INFO L225 Difference]: With dead ends: 176 [2020-10-16 10:47:08,930 INFO L226 Difference]: Without dead ends: 171 [2020-10-16 10:47:08,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:47:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-16 10:47:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-16 10:47:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 10:47:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 10:47:08,936 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 10:47:08,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:08,937 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 10:47:08,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:08,937 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 10:47:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:08,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:08,938 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:09,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-16 10:47:09,150 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:09,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:09,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-16 10:47:09,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:09,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563171596] [2020-10-16 10:47:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:09,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563171596] [2020-10-16 10:47:09,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610516052] [2020-10-16 10:47:09,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:09,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:09,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:09,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:09,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:09,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:09,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:09,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:09,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492183585] [2020-10-16 10:47:09,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:09,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:09,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:09,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:09,374 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 10:47:09,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:09,612 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-16 10:47:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:09,613 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:09,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:09,614 INFO L225 Difference]: With dead ends: 166 [2020-10-16 10:47:09,614 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 10:47:09,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 10:47:09,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-16 10:47:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-16 10:47:09,618 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-16 10:47:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:09,618 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-16 10:47:09,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-16 10:47:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:09,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:09,619 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:09,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:09,825 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:09,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-16 10:47:09,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:09,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418183810] [2020-10-16 10:47:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:09,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418183810] [2020-10-16 10:47:09,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720180667] [2020-10-16 10:47:09,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:09,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:09,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:09,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:09,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:10,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:10,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:10,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:10,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431337213] [2020-10-16 10:47:10,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:10,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:10,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:10,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:10,009 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-16 10:47:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:10,171 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-16 10:47:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:10,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:10,175 INFO L225 Difference]: With dead ends: 163 [2020-10-16 10:47:10,176 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 10:47:10,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:10,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 10:47:10,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-16 10:47:10,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-16 10:47:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-16 10:47:10,180 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-16 10:47:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:10,180 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-16 10:47:10,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-16 10:47:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:10,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:10,181 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:10,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 10:47:10,393 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:10,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:10,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-16 10:47:10,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:10,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395776468] [2020-10-16 10:47:10,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:10,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395776468] [2020-10-16 10:47:10,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447817639] [2020-10-16 10:47:10,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:10,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:10,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:10,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:10,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:10,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:10,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:10,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125491221] [2020-10-16 10:47:10,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:10,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:10,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:10,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:10,593 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-16 10:47:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:10,849 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-16 10:47:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:10,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:10,851 INFO L225 Difference]: With dead ends: 170 [2020-10-16 10:47:10,851 INFO L226 Difference]: Without dead ends: 168 [2020-10-16 10:47:10,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:10,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-16 10:47:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-16 10:47:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-16 10:47:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-16 10:47:10,856 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-16 10:47:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:10,856 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-16 10:47:10,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-16 10:47:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:10,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:10,857 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:11,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:11,058 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-16 10:47:11,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:11,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776942330] [2020-10-16 10:47:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:11,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776942330] [2020-10-16 10:47:11,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553715027] [2020-10-16 10:47:11,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:11,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:11,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:11,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:11,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:11,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:11,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130600142] [2020-10-16 10:47:11,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:11,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:11,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:11,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:11,285 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-16 10:47:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:11,635 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-16 10:47:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:11,635 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:11,637 INFO L225 Difference]: With dead ends: 177 [2020-10-16 10:47:11,637 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 10:47:11,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:47:11,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 10:47:11,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-16 10:47:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-16 10:47:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-16 10:47:11,642 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-16 10:47:11,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:11,643 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-16 10:47:11,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:11,643 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-16 10:47:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:11,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:11,644 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:11,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 10:47:11,855 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:11,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:11,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-16 10:47:11,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:11,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086482014] [2020-10-16 10:47:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:11,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086482014] [2020-10-16 10:47:11,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884678494] [2020-10-16 10:47:11,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:11,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:11,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:11,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:12,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:12,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:12,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:12,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631918554] [2020-10-16 10:47:12,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:12,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:12,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:12,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:12,033 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-16 10:47:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:12,416 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-16 10:47:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:12,417 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:12,418 INFO L225 Difference]: With dead ends: 190 [2020-10-16 10:47:12,418 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 10:47:12,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:47:12,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 10:47:12,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-16 10:47:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-16 10:47:12,424 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-16 10:47:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:12,425 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-16 10:47:12,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-16 10:47:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:12,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:12,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:12,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 10:47:12,636 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:12,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-16 10:47:12,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:12,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137507461] [2020-10-16 10:47:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:12,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137507461] [2020-10-16 10:47:12,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276159237] [2020-10-16 10:47:12,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:12,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:47:12,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:12,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:12,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:12,825 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:12,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:12,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:12,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068469764] [2020-10-16 10:47:12,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:12,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:12,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:12,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:12,835 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-16 10:47:13,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:13,193 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-16 10:47:13,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:13,194 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:13,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:13,195 INFO L225 Difference]: With dead ends: 180 [2020-10-16 10:47:13,195 INFO L226 Difference]: Without dead ends: 175 [2020-10-16 10:47:13,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:47:13,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-16 10:47:13,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-16 10:47:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:13,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-16 10:47:13,199 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-16 10:47:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:13,199 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-16 10:47:13,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:13,200 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-16 10:47:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:13,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:13,200 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:13,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 10:47:13,409 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:13,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-16 10:47:13,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:13,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039946949] [2020-10-16 10:47:13,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:13,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039946949] [2020-10-16 10:47:13,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377514085] [2020-10-16 10:47:13,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:13,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:13,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:13,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:13,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:13,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:13,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:13,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24366254] [2020-10-16 10:47:13,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:13,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:13,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:13,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:13,606 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-16 10:47:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:13,748 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-16 10:47:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:13,749 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:13,750 INFO L225 Difference]: With dead ends: 164 [2020-10-16 10:47:13,750 INFO L226 Difference]: Without dead ends: 162 [2020-10-16 10:47:13,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:13,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-16 10:47:13,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-16 10:47:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-16 10:47:13,755 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-16 10:47:13,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:13,755 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-16 10:47:13,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-16 10:47:13,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:13,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:13,756 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:13,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 10:47:13,960 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:13,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-16 10:47:13,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:13,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104209740] [2020-10-16 10:47:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:14,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104209740] [2020-10-16 10:47:14,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133395929] [2020-10-16 10:47:14,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:14,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:14,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:14,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:14,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:14,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:14,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:14,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355216484] [2020-10-16 10:47:14,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:14,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:14,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:14,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:14,169 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-16 10:47:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:14,334 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-16 10:47:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:14,334 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:14,336 INFO L225 Difference]: With dead ends: 161 [2020-10-16 10:47:14,336 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 10:47:14,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 10:47:14,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-16 10:47:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:14,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-16 10:47:14,340 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-16 10:47:14,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:14,340 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-16 10:47:14,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:14,341 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-16 10:47:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:14,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:14,341 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:14,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 10:47:14,550 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:14,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:14,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-16 10:47:14,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:14,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651493581] [2020-10-16 10:47:14,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:14,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:14,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651493581] [2020-10-16 10:47:14,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727192400] [2020-10-16 10:47:14,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:14,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:47:14,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:14,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:14,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:14,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:14,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:14,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346845222] [2020-10-16 10:47:14,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:14,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:14,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:14,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:14,747 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-16 10:47:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:14,946 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-16 10:47:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:14,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:14,948 INFO L225 Difference]: With dead ends: 165 [2020-10-16 10:47:14,948 INFO L226 Difference]: Without dead ends: 163 [2020-10-16 10:47:14,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:14,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-16 10:47:14,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-16 10:47:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-16 10:47:14,951 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-16 10:47:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:14,952 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-16 10:47:14,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-16 10:47:14,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:14,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:14,952 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:15,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-16 10:47:15,156 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:15,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:15,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-16 10:47:15,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:15,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614744950] [2020-10-16 10:47:15,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:15,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614744950] [2020-10-16 10:47:15,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203524016] [2020-10-16 10:47:15,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:15,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:15,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:15,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:15,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:15,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740555200] [2020-10-16 10:47:15,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:15,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:15,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:15,350 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-16 10:47:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:15,551 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-16 10:47:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:15,552 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:15,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:15,553 INFO L225 Difference]: With dead ends: 167 [2020-10-16 10:47:15,553 INFO L226 Difference]: Without dead ends: 165 [2020-10-16 10:47:15,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:15,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-16 10:47:15,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-16 10:47:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 10:47:15,557 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 10:47:15,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:15,557 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 10:47:15,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 10:47:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:15,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:15,558 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:15,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:15,759 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:15,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:15,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-16 10:47:15,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:15,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766767367] [2020-10-16 10:47:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:15,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766767367] [2020-10-16 10:47:15,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096522636] [2020-10-16 10:47:15,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:15,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:15,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:15,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:15,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:15,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:15,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:15,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526364184] [2020-10-16 10:47:15,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:15,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:15,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:15,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:15,965 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 10:47:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:16,214 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-16 10:47:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:47:16,214 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:16,216 INFO L225 Difference]: With dead ends: 168 [2020-10-16 10:47:16,216 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 10:47:16,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 10:47:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-16 10:47:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 10:47:16,220 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 10:47:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:16,220 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 10:47:16,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 10:47:16,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:16,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:16,221 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:16,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:16,422 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:16,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:16,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-16 10:47:16,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:16,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660124602] [2020-10-16 10:47:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:16,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660124602] [2020-10-16 10:47:16,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114990446] [2020-10-16 10:47:16,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:16,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:16,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:16,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:16,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:16,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:16,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:16,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:16,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744466607] [2020-10-16 10:47:16,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:16,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:16,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:16,592 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 10:47:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:16,784 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-16 10:47:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:16,785 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:16,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:16,786 INFO L225 Difference]: With dead ends: 160 [2020-10-16 10:47:16,786 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 10:47:16,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:16,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 10:47:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-16 10:47:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 10:47:16,790 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 10:47:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:16,791 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 10:47:16,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 10:47:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:16,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:16,791 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:16,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:16,992 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:16,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-16 10:47:16,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:16,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229830551] [2020-10-16 10:47:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:17,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229830551] [2020-10-16 10:47:17,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995784298] [2020-10-16 10:47:17,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:17,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:17,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:17,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:17,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:17,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:17,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:17,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:17,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41828060] [2020-10-16 10:47:17,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:17,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:17,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:17,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:17,194 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 10:47:17,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:17,528 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-16 10:47:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:17,529 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:17,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:17,530 INFO L225 Difference]: With dead ends: 189 [2020-10-16 10:47:17,531 INFO L226 Difference]: Without dead ends: 181 [2020-10-16 10:47:17,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:47:17,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-16 10:47:17,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-16 10:47:17,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 10:47:17,535 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 10:47:17,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:17,535 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 10:47:17,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:17,535 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 10:47:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:17,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:17,536 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:17,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:17,747 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-16 10:47:17,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:17,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580881564] [2020-10-16 10:47:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:17,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580881564] [2020-10-16 10:47:17,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429282972] [2020-10-16 10:47:17,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:17,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:17,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:17,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:17,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:17,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:17,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:17,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144736149] [2020-10-16 10:47:17,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:17,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:17,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:17,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:17,970 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 10:47:18,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:18,208 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-16 10:47:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:47:18,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:18,210 INFO L225 Difference]: With dead ends: 169 [2020-10-16 10:47:18,210 INFO L226 Difference]: Without dead ends: 167 [2020-10-16 10:47:18,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-16 10:47:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-16 10:47:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 10:47:18,214 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 10:47:18,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:18,215 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 10:47:18,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 10:47:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:18,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:18,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:18,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-16 10:47:18,419 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:18,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:18,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-16 10:47:18,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:18,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954396162] [2020-10-16 10:47:18,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:18,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954396162] [2020-10-16 10:47:18,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081533992] [2020-10-16 10:47:18,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:18,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:18,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:18,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:18,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:18,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:18,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:18,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:18,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992821837] [2020-10-16 10:47:18,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:18,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:18,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:18,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:18,608 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 10:47:18,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:18,936 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-16 10:47:18,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:18,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:18,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:18,939 INFO L225 Difference]: With dead ends: 192 [2020-10-16 10:47:18,939 INFO L226 Difference]: Without dead ends: 184 [2020-10-16 10:47:18,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:47:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-16 10:47:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-16 10:47:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 10:47:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-16 10:47:18,943 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-16 10:47:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:18,943 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-16 10:47:18,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-16 10:47:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:18,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:18,944 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:19,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:19,156 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:19,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:19,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-16 10:47:19,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:19,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425702636] [2020-10-16 10:47:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:19,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425702636] [2020-10-16 10:47:19,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344702384] [2020-10-16 10:47:19,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:19,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:19,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:19,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:19,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:19,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:19,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101703129] [2020-10-16 10:47:19,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:19,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:19,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:19,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:19,400 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-16 10:47:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:19,751 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-16 10:47:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:19,751 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:19,753 INFO L225 Difference]: With dead ends: 180 [2020-10-16 10:47:19,753 INFO L226 Difference]: Without dead ends: 175 [2020-10-16 10:47:19,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:47:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-16 10:47:19,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-16 10:47:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 10:47:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-16 10:47:19,756 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-16 10:47:19,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:19,757 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-16 10:47:19,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-16 10:47:19,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:19,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:19,757 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:19,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-16 10:47:19,958 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:19,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:19,959 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-16 10:47:19,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:19,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593083360] [2020-10-16 10:47:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:20,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593083360] [2020-10-16 10:47:20,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941105956] [2020-10-16 10:47:20,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:20,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:20,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:20,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:20,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:20,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:20,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:20,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 10:47:20,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578188315] [2020-10-16 10:47:20,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:47:20,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:20,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:47:20,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:20,202 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-16 10:47:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:20,343 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-16 10:47:20,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:20,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-16 10:47:20,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:20,346 INFO L225 Difference]: With dead ends: 164 [2020-10-16 10:47:20,346 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 10:47:20,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 10:47:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 10:47:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 10:47:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-16 10:47:20,350 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-16 10:47:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:20,350 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-16 10:47:20,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:47:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-16 10:47:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:20,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:20,351 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:20,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:20,563 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:20,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:20,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-16 10:47:20,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:20,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520699457] [2020-10-16 10:47:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:20,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520699457] [2020-10-16 10:47:20,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965225987] [2020-10-16 10:47:20,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:20,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:47:20,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:20,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:20,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:20,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:20,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854395897] [2020-10-16 10:47:20,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:20,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:20,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:20,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:20,837 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-16 10:47:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:20,881 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 10:47:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:47:20,882 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:20,883 INFO L225 Difference]: With dead ends: 156 [2020-10-16 10:47:20,883 INFO L226 Difference]: Without dead ends: 153 [2020-10-16 10:47:20,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-16 10:47:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-16 10:47:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 10:47:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 10:47:20,887 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 10:47:20,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:20,887 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 10:47:20,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:20,887 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 10:47:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:20,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:20,888 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:21,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 10:47:21,098 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:21,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-16 10:47:21,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:21,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606395074] [2020-10-16 10:47:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:21,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606395074] [2020-10-16 10:47:21,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325097063] [2020-10-16 10:47:21,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:21,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:21,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:21,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:21,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:21,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:21,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:21,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984410457] [2020-10-16 10:47:21,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:21,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:21,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:21,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:21,360 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 10:47:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:21,427 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-16 10:47:21,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:21,428 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:21,429 INFO L225 Difference]: With dead ends: 170 [2020-10-16 10:47:21,429 INFO L226 Difference]: Without dead ends: 167 [2020-10-16 10:47:21,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-16 10:47:21,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-16 10:47:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 10:47:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 10:47:21,433 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 10:47:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:21,433 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 10:47:21,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 10:47:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:21,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:21,434 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:21,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:21,644 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:21,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:21,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-16 10:47:21,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:21,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250132674] [2020-10-16 10:47:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:21,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250132674] [2020-10-16 10:47:21,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100725295] [2020-10-16 10:47:21,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:21,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:21,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:21,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:21,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:21,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:21,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:21,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335687210] [2020-10-16 10:47:21,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:21,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:21,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:21,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:21,910 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 10:47:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:21,989 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-16 10:47:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:21,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:21,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:21,991 INFO L225 Difference]: With dead ends: 169 [2020-10-16 10:47:21,991 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 10:47:21,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 10:47:21,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-16 10:47:21,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 10:47:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-16 10:47:21,996 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-16 10:47:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:21,996 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-16 10:47:21,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:21,996 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-16 10:47:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:21,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:21,997 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:22,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:22,207 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:22,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:22,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-16 10:47:22,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:22,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386640122] [2020-10-16 10:47:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:22,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386640122] [2020-10-16 10:47:22,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757361159] [2020-10-16 10:47:22,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:22,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:47:22,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:22,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:22,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:22,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:22,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972051086] [2020-10-16 10:47:22,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:22,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:22,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:22,462 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-16 10:47:22,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:22,560 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-16 10:47:22,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:22,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:22,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:22,561 INFO L225 Difference]: With dead ends: 168 [2020-10-16 10:47:22,561 INFO L226 Difference]: Without dead ends: 165 [2020-10-16 10:47:22,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:22,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-16 10:47:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-16 10:47:22,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 10:47:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-16 10:47:22,565 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-16 10:47:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:22,565 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-16 10:47:22,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:22,566 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-16 10:47:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:22,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:22,566 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:22,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-16 10:47:22,767 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:22,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:22,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-16 10:47:22,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:22,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627122333] [2020-10-16 10:47:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:22,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627122333] [2020-10-16 10:47:22,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947580881] [2020-10-16 10:47:22,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:22,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:22,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:22,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:22,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:22,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011312081] [2020-10-16 10:47:22,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:22,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:22,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:22,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:22,998 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-16 10:47:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:23,132 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-16 10:47:23,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:23,133 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:23,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:23,134 INFO L225 Difference]: With dead ends: 167 [2020-10-16 10:47:23,134 INFO L226 Difference]: Without dead ends: 164 [2020-10-16 10:47:23,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:23,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-16 10:47:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-16 10:47:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 10:47:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-16 10:47:23,138 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-16 10:47:23,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:23,139 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-16 10:47:23,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:23,139 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-16 10:47:23,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:23,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:23,140 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:23,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:23,350 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:23,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-16 10:47:23,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:23,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629208166] [2020-10-16 10:47:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:23,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629208166] [2020-10-16 10:47:23,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113940773] [2020-10-16 10:47:23,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:23,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:23,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:23,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:23,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:23,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:23,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:23,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:23,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509386195] [2020-10-16 10:47:23,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:23,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:23,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:23,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:23,589 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-16 10:47:23,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:23,762 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-16 10:47:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:23,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:23,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:23,764 INFO L225 Difference]: With dead ends: 176 [2020-10-16 10:47:23,764 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 10:47:23,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 10:47:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-16 10:47:23,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 10:47:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-16 10:47:23,770 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-16 10:47:23,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:23,770 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-16 10:47:23,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:23,771 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-16 10:47:23,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:23,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:23,772 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:23,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:23,983 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:23,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-16 10:47:23,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:23,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637599516] [2020-10-16 10:47:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:24,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637599516] [2020-10-16 10:47:24,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845797930] [2020-10-16 10:47:24,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:24,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:24,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:24,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:24,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:24,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:24,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:24,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659832908] [2020-10-16 10:47:24,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:24,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:24,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:24,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:24,365 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-16 10:47:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:24,432 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-16 10:47:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:47:24,433 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:24,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:24,435 INFO L225 Difference]: With dead ends: 163 [2020-10-16 10:47:24,435 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 10:47:24,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:24,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 10:47:24,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-16 10:47:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 10:47:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-16 10:47:24,440 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-16 10:47:24,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:24,441 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-16 10:47:24,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-16 10:47:24,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:24,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:24,442 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:24,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-16 10:47:24,654 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:24,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:24,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-16 10:47:24,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:24,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605641662] [2020-10-16 10:47:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:24,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605641662] [2020-10-16 10:47:24,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048006435] [2020-10-16 10:47:24,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:24,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:24,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:24,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:24,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:24,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:24,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:24,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375726643] [2020-10-16 10:47:24,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:24,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:24,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:24,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:24,934 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-16 10:47:25,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:25,081 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-16 10:47:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:25,082 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:25,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:25,083 INFO L225 Difference]: With dead ends: 172 [2020-10-16 10:47:25,083 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 10:47:25,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 10:47:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-16 10:47:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 10:47:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 10:47:25,087 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 10:47:25,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:25,087 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 10:47:25,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 10:47:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:25,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:25,088 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:25,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:25,299 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:25,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-16 10:47:25,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:25,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875235652] [2020-10-16 10:47:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:25,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875235652] [2020-10-16 10:47:25,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835362030] [2020-10-16 10:47:25,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:25,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:25,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:25,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:25,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:25,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:25,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:25,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276650378] [2020-10-16 10:47:25,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:25,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:25,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:25,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:25,601 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 10:47:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:25,785 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 10:47:25,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:25,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:25,787 INFO L225 Difference]: With dead ends: 179 [2020-10-16 10:47:25,787 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 10:47:25,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 10:47:25,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-16 10:47:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 10:47:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-16 10:47:25,792 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-16 10:47:25,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:25,792 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-16 10:47:25,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:25,793 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-16 10:47:25,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:25,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:25,793 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:25,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-16 10:47:25,999 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:25,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-16 10:47:25,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:26,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067479312] [2020-10-16 10:47:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:26,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067479312] [2020-10-16 10:47:26,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505123578] [2020-10-16 10:47:26,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:26,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:26,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:26,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:26,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:26,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:26,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:26,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682813922] [2020-10-16 10:47:26,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:26,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:26,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:26,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:26,243 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-16 10:47:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:26,424 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 10:47:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:26,425 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:26,426 INFO L225 Difference]: With dead ends: 179 [2020-10-16 10:47:26,426 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 10:47:26,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:26,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 10:47:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-16 10:47:26,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 10:47:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 10:47:26,432 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 10:47:26,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:26,432 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 10:47:26,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 10:47:26,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:26,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:26,433 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:26,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 10:47:26,642 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:26,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:26,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-16 10:47:26,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:26,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723208331] [2020-10-16 10:47:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:26,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723208331] [2020-10-16 10:47:26,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169964150] [2020-10-16 10:47:26,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:26,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:26,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:26,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:26,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:26,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:26,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:26,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675308660] [2020-10-16 10:47:26,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:26,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:26,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:26,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:26,860 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 10:47:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:27,053 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-16 10:47:27,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:27,054 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:27,055 INFO L225 Difference]: With dead ends: 184 [2020-10-16 10:47:27,056 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 10:47:27,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 10:47:27,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-16 10:47:27,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 10:47:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-16 10:47:27,060 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-16 10:47:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:27,060 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-16 10:47:27,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:27,060 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-16 10:47:27,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:27,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:27,061 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:27,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-16 10:47:27,272 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:27,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:27,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-16 10:47:27,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:27,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950718729] [2020-10-16 10:47:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:27,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950718729] [2020-10-16 10:47:27,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429505434] [2020-10-16 10:47:27,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:27,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:27,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:27,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:27,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:27,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558494889] [2020-10-16 10:47:27,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:27,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:27,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:27,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:27,522 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-16 10:47:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:27,724 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-16 10:47:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:27,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:27,726 INFO L225 Difference]: With dead ends: 179 [2020-10-16 10:47:27,726 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 10:47:27,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:27,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 10:47:27,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-16 10:47:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-16 10:47:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-16 10:47:27,730 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-16 10:47:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:27,730 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-16 10:47:27,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-16 10:47:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:27,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:27,731 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:27,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:27,942 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:27,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:27,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-16 10:47:27,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:27,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976241254] [2020-10-16 10:47:27,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:28,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976241254] [2020-10-16 10:47:28,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357018012] [2020-10-16 10:47:28,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:28,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:28,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:28,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:28,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:28,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:28,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:28,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018452432] [2020-10-16 10:47:28,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:28,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:28,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:28,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:28,178 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-16 10:47:28,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:28,327 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-16 10:47:28,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:28,328 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:28,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:28,330 INFO L225 Difference]: With dead ends: 176 [2020-10-16 10:47:28,330 INFO L226 Difference]: Without dead ends: 174 [2020-10-16 10:47:28,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-16 10:47:28,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-16 10:47:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:47:28,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-16 10:47:28,336 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-16 10:47:28,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:28,336 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-16 10:47:28,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:28,337 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-16 10:47:28,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:28,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:28,337 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:28,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:28,546 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:28,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-16 10:47:28,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:28,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959377875] [2020-10-16 10:47:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:28,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959377875] [2020-10-16 10:47:28,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933313382] [2020-10-16 10:47:28,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:28,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:47:28,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:28,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:28,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:28,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:28,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:28,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945845135] [2020-10-16 10:47:28,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:28,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:28,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:28,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:28,820 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-16 10:47:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:29,050 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-16 10:47:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:29,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:29,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:29,052 INFO L225 Difference]: With dead ends: 185 [2020-10-16 10:47:29,052 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 10:47:29,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 10:47:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-16 10:47:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:47:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-16 10:47:29,056 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-16 10:47:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:29,056 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-16 10:47:29,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-16 10:47:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:29,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:29,057 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:29,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:29,266 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:29,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:29,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-16 10:47:29,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:29,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358361674] [2020-10-16 10:47:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:29,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358361674] [2020-10-16 10:47:29,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212352226] [2020-10-16 10:47:29,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:29,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:29,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:29,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:29,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:29,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:29,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278541749] [2020-10-16 10:47:29,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:29,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:29,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:29,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:29,514 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-16 10:47:29,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:29,704 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-16 10:47:29,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:29,705 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:29,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:29,706 INFO L225 Difference]: With dead ends: 185 [2020-10-16 10:47:29,706 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 10:47:29,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:29,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 10:47:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-16 10:47:29,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 10:47:29,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-16 10:47:29,710 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-16 10:47:29,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:29,710 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-16 10:47:29,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:29,711 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-16 10:47:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:29,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:29,711 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:29,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:29,912 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:29,913 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-16 10:47:29,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:29,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335237904] [2020-10-16 10:47:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:30,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335237904] [2020-10-16 10:47:30,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004292843] [2020-10-16 10:47:30,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:30,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:30,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:30,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:30,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:30,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:30,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:30,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476730648] [2020-10-16 10:47:30,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:30,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:30,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:30,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:30,190 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-16 10:47:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:30,262 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-16 10:47:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:30,263 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:30,264 INFO L225 Difference]: With dead ends: 182 [2020-10-16 10:47:30,264 INFO L226 Difference]: Without dead ends: 180 [2020-10-16 10:47:30,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-16 10:47:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-16 10:47:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:47:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-16 10:47:30,268 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-16 10:47:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:30,268 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-16 10:47:30,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-16 10:47:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:30,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:30,269 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:30,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-16 10:47:30,479 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:30,480 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-16 10:47:30,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:30,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149861485] [2020-10-16 10:47:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:30,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149861485] [2020-10-16 10:47:30,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257378119] [2020-10-16 10:47:30,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:30,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:30,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:30,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:30,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:30,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:30,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:30,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371589819] [2020-10-16 10:47:30,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:30,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:30,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:30,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:30,787 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-16 10:47:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:30,961 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-16 10:47:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:47:30,961 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:30,963 INFO L225 Difference]: With dead ends: 185 [2020-10-16 10:47:30,963 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 10:47:30,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:30,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 10:47:30,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-16 10:47:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:47:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 10:47:30,966 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 10:47:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:30,966 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 10:47:30,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 10:47:30,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:30,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:30,967 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:31,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:31,168 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:31,169 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-16 10:47:31,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:31,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082657054] [2020-10-16 10:47:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082657054] [2020-10-16 10:47:31,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649224214] [2020-10-16 10:47:31,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:31,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:31,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:31,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:31,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:31,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083303359] [2020-10-16 10:47:31,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:31,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:31,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:31,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:31,447 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:31,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:31,671 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-16 10:47:31,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:47:31,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:31,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:31,673 INFO L225 Difference]: With dead ends: 191 [2020-10-16 10:47:31,673 INFO L226 Difference]: Without dead ends: 189 [2020-10-16 10:47:31,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-16 10:47:31,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-16 10:47:31,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:47:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-16 10:47:31,678 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-16 10:47:31,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:31,678 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-16 10:47:31,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-16 10:47:31,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:31,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:31,678 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:31,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:31,880 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-16 10:47:31,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:31,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960218210] [2020-10-16 10:47:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:31,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960218210] [2020-10-16 10:47:31,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697925166] [2020-10-16 10:47:31,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:31,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:31,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:31,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:31,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:32,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:32,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:32,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870215118] [2020-10-16 10:47:32,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:32,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:32,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:32,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:32,116 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-16 10:47:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:32,348 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-16 10:47:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:32,349 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:32,351 INFO L225 Difference]: With dead ends: 187 [2020-10-16 10:47:32,351 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 10:47:32,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 10:47:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-16 10:47:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:47:32,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 10:47:32,354 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 10:47:32,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:32,355 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 10:47:32,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:32,355 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 10:47:32,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:32,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:32,355 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:32,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-16 10:47:32,556 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:32,557 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-16 10:47:32,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:32,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642933208] [2020-10-16 10:47:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:32,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642933208] [2020-10-16 10:47:32,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643923959] [2020-10-16 10:47:32,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:32,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:32,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:32,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:32,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:32,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:32,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:32,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544616916] [2020-10-16 10:47:32,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:32,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:32,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:32,788 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:33,028 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-16 10:47:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:33,029 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:33,031 INFO L225 Difference]: With dead ends: 198 [2020-10-16 10:47:33,031 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 10:47:33,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 10:47:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-16 10:47:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:47:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-16 10:47:33,034 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-16 10:47:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:33,034 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-16 10:47:33,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:33,034 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-16 10:47:33,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:33,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:33,035 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:33,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:33,235 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:33,236 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-16 10:47:33,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:33,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291526824] [2020-10-16 10:47:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:33,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291526824] [2020-10-16 10:47:33,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095080550] [2020-10-16 10:47:33,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:33,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:33,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:33,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:33,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:33,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:33,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:33,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124176941] [2020-10-16 10:47:33,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:33,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:33,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:33,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:33,473 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-16 10:47:33,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:33,740 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-16 10:47:33,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:33,740 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:33,742 INFO L225 Difference]: With dead ends: 189 [2020-10-16 10:47:33,742 INFO L226 Difference]: Without dead ends: 187 [2020-10-16 10:47:33,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-16 10:47:33,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-16 10:47:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:47:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-16 10:47:33,746 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-16 10:47:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:33,746 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-16 10:47:33,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:33,746 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-16 10:47:33,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:33,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:33,747 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:33,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-16 10:47:33,948 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:33,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:33,948 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-16 10:47:33,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:33,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281710533] [2020-10-16 10:47:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:34,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281710533] [2020-10-16 10:47:34,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981770552] [2020-10-16 10:47:34,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:34,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:34,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:34,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:34,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:34,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:34,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:34,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501861311] [2020-10-16 10:47:34,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:34,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:34,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:34,215 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-16 10:47:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:34,287 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-16 10:47:34,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:34,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:34,289 INFO L225 Difference]: With dead ends: 178 [2020-10-16 10:47:34,289 INFO L226 Difference]: Without dead ends: 176 [2020-10-16 10:47:34,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-16 10:47:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-16 10:47:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-16 10:47:34,293 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-16 10:47:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:34,293 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-16 10:47:34,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-16 10:47:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:34,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:34,294 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:34,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:34,503 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:34,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:34,503 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-16 10:47:34,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:34,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987831517] [2020-10-16 10:47:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:34,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987831517] [2020-10-16 10:47:34,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009315461] [2020-10-16 10:47:34,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:34,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:34,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:34,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:34,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:34,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666704416] [2020-10-16 10:47:34,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:34,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:34,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:34,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:34,757 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-16 10:47:34,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:34,952 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-16 10:47:34,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:34,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:34,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:34,954 INFO L225 Difference]: With dead ends: 193 [2020-10-16 10:47:34,954 INFO L226 Difference]: Without dead ends: 191 [2020-10-16 10:47:34,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:34,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-16 10:47:34,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-16 10:47:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:47:34,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-16 10:47:34,958 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-16 10:47:34,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:34,958 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-16 10:47:34,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:34,958 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-16 10:47:34,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:34,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:34,959 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:35,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-16 10:47:35,160 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:35,160 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-16 10:47:35,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:35,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596250901] [2020-10-16 10:47:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:35,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596250901] [2020-10-16 10:47:35,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092284845] [2020-10-16 10:47:35,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:35,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:35,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:35,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:35,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:35,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346907559] [2020-10-16 10:47:35,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:35,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:35,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:35,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:35,435 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-16 10:47:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:35,681 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-16 10:47:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:35,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:35,683 INFO L225 Difference]: With dead ends: 195 [2020-10-16 10:47:35,683 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 10:47:35,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 10:47:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-16 10:47:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:47:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-16 10:47:35,687 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-16 10:47:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:35,687 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-16 10:47:35,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-16 10:47:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:35,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:35,687 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:35,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:35,888 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:35,889 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-16 10:47:35,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:35,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100146941] [2020-10-16 10:47:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:35,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100146941] [2020-10-16 10:47:35,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023893599] [2020-10-16 10:47:35,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:36,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:36,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:36,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:36,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:36,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:36,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:36,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237936945] [2020-10-16 10:47:36,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:36,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:36,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:36,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:36,142 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-16 10:47:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:36,258 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-16 10:47:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:36,259 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:36,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:36,261 INFO L225 Difference]: With dead ends: 174 [2020-10-16 10:47:36,261 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 10:47:36,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:36,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 10:47:36,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-16 10:47:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:47:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-16 10:47:36,265 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-16 10:47:36,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:36,265 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-16 10:47:36,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:36,265 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-16 10:47:36,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:36,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:36,266 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:36,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-16 10:47:36,467 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:36,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:36,467 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-16 10:47:36,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:36,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905477948] [2020-10-16 10:47:36,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:36,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905477948] [2020-10-16 10:47:36,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269079024] [2020-10-16 10:47:36,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:36,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:36,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:36,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:36,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:36,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:36,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:36,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428629695] [2020-10-16 10:47:36,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:36,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:36,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:36,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:36,705 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-16 10:47:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:36,925 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-16 10:47:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:36,926 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:36,927 INFO L225 Difference]: With dead ends: 189 [2020-10-16 10:47:36,928 INFO L226 Difference]: Without dead ends: 187 [2020-10-16 10:47:36,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:36,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-16 10:47:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-16 10:47:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:47:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-16 10:47:36,931 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-16 10:47:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:36,931 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-16 10:47:36,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:36,931 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-16 10:47:36,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:36,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:36,932 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:37,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:37,133 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:37,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:37,134 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-16 10:47:37,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:37,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011823092] [2020-10-16 10:47:37,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:37,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011823092] [2020-10-16 10:47:37,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447713719] [2020-10-16 10:47:37,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:37,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:37,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:37,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:37,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:37,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:37,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:37,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178610744] [2020-10-16 10:47:37,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:37,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:37,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:37,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:37,382 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-16 10:47:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:37,519 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-16 10:47:37,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:37,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:37,521 INFO L225 Difference]: With dead ends: 175 [2020-10-16 10:47:37,521 INFO L226 Difference]: Without dead ends: 173 [2020-10-16 10:47:37,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-16 10:47:37,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-16 10:47:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:47:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 10:47:37,525 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 10:47:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:37,526 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 10:47:37,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:37,526 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 10:47:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:37,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:37,527 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:37,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:37,729 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:37,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:37,730 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-16 10:47:37,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:37,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702282045] [2020-10-16 10:47:37,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:37,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702282045] [2020-10-16 10:47:37,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423026843] [2020-10-16 10:47:37,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:37,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:37,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:37,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:37,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:37,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:37,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:37,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:37,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042506160] [2020-10-16 10:47:37,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:37,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:37,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:37,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:37,981 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:38,312 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-16 10:47:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:38,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:38,315 INFO L225 Difference]: With dead ends: 195 [2020-10-16 10:47:38,315 INFO L226 Difference]: Without dead ends: 190 [2020-10-16 10:47:38,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:47:38,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-16 10:47:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-16 10:47:38,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 10:47:38,318 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 10:47:38,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:38,318 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 10:47:38,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 10:47:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:38,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:38,318 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:38,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:38,519 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-16 10:47:38,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:38,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943014288] [2020-10-16 10:47:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:38,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943014288] [2020-10-16 10:47:38,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917123829] [2020-10-16 10:47:38,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:38,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:38,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:38,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:38,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:38,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:38,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:38,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422870883] [2020-10-16 10:47:38,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:38,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:38,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:38,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:38,760 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 10:47:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:39,013 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-16 10:47:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:47:39,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:39,015 INFO L225 Difference]: With dead ends: 187 [2020-10-16 10:47:39,015 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 10:47:39,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 10:47:39,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-16 10:47:39,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:47:39,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 10:47:39,019 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 10:47:39,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:39,019 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 10:47:39,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 10:47:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:39,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:39,020 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:39,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:39,221 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-16 10:47:39,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:39,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344785698] [2020-10-16 10:47:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:39,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344785698] [2020-10-16 10:47:39,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113932111] [2020-10-16 10:47:39,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:39,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:39,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:39,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:39,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:39,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:39,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855945539] [2020-10-16 10:47:39,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:39,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:39,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:39,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:39,471 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:39,908 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-16 10:47:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:39,908 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:39,910 INFO L225 Difference]: With dead ends: 212 [2020-10-16 10:47:39,910 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 10:47:39,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:47:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 10:47:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 10:47:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:47:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 10:47:39,914 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 10:47:39,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:39,914 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 10:47:39,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:39,914 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 10:47:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:39,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:39,914 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:40,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-16 10:47:40,115 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:40,116 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-16 10:47:40,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:40,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999511151] [2020-10-16 10:47:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:40,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999511151] [2020-10-16 10:47:40,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474942501] [2020-10-16 10:47:40,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:40,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:40,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:40,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:40,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:40,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:40,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:40,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:40,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463286422] [2020-10-16 10:47:40,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:40,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:40,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:40,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:40,354 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:40,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:40,689 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-16 10:47:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:40,690 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:40,691 INFO L225 Difference]: With dead ends: 202 [2020-10-16 10:47:40,691 INFO L226 Difference]: Without dead ends: 197 [2020-10-16 10:47:40,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:47:40,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-16 10:47:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-16 10:47:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:47:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-16 10:47:40,696 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-16 10:47:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:40,696 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-16 10:47:40,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-16 10:47:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:40,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:40,697 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:40,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:40,903 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:40,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:40,903 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-16 10:47:40,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:40,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438903904] [2020-10-16 10:47:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:40,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438903904] [2020-10-16 10:47:40,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421104527] [2020-10-16 10:47:40,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:41,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:41,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:41,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:41,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:41,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:41,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:41,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880561830] [2020-10-16 10:47:41,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:41,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:41,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:41,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:41,187 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-16 10:47:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:41,453 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-16 10:47:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:41,454 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:41,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:41,456 INFO L225 Difference]: With dead ends: 198 [2020-10-16 10:47:41,456 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 10:47:41,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 10:47:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-16 10:47:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 10:47:41,463 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 10:47:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:41,463 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 10:47:41,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 10:47:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:41,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:41,464 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:41,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 10:47:41,665 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:41,665 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-16 10:47:41,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:41,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917822955] [2020-10-16 10:47:41,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:41,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917822955] [2020-10-16 10:47:41,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593131266] [2020-10-16 10:47:41,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:41,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:41,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:41,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:41,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:41,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:41,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:41,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407153662] [2020-10-16 10:47:41,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:41,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:41,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:41,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:41,936 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 10:47:42,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:42,341 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-16 10:47:42,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:47:42,342 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:42,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:42,343 INFO L225 Difference]: With dead ends: 209 [2020-10-16 10:47:42,343 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 10:47:42,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:47:42,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 10:47:42,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 10:47:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:47:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 10:47:42,347 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 10:47:42,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:42,347 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 10:47:42,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:42,347 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 10:47:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:42,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:42,348 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:42,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 10:47:42,548 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:42,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:42,549 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-16 10:47:42,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:42,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841685735] [2020-10-16 10:47:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:42,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841685735] [2020-10-16 10:47:42,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497546011] [2020-10-16 10:47:42,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:42,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:42,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:42,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:42,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:42,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:42,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:42,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:42,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771050417] [2020-10-16 10:47:42,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:42,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:42,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:42,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:42,810 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:43,359 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-16 10:47:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:43,360 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:43,362 INFO L225 Difference]: With dead ends: 217 [2020-10-16 10:47:43,362 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 10:47:43,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:47:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 10:47:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-16 10:47:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 10:47:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-16 10:47:43,366 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-16 10:47:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:43,367 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-16 10:47:43,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:43,367 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-16 10:47:43,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:43,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:43,368 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:43,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-16 10:47:43,577 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:43,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:43,577 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-16 10:47:43,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:43,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429920036] [2020-10-16 10:47:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:43,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429920036] [2020-10-16 10:47:43,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025576895] [2020-10-16 10:47:43,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:43,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:43,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:43,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:43,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:45,890 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:45,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:45,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:45,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410598343] [2020-10-16 10:47:45,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:45,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:45,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:45,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-16 10:47:45,930 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-16 10:47:50,246 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-16 10:47:54,470 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-16 10:47:56,678 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-10-16 10:47:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:56,991 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-16 10:47:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:47:56,991 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:56,993 INFO L225 Difference]: With dead ends: 236 [2020-10-16 10:47:56,993 INFO L226 Difference]: Without dead ends: 228 [2020-10-16 10:47:56,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-16 10:47:56,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-16 10:47:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-16 10:47:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:47:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-16 10:47:56,997 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-16 10:47:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:56,997 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-16 10:47:56,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-16 10:47:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:56,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:56,998 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:57,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 10:47:57,199 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:57,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:57,199 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-16 10:47:57,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:57,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120392224] [2020-10-16 10:47:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:57,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120392224] [2020-10-16 10:47:57,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700831156] [2020-10-16 10:47:57,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:57,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:57,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:57,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:57,458 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:57,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:57,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:57,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636333806] [2020-10-16 10:47:57,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:57,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:57,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:57,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:57,492 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-16 10:47:58,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:58,074 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-16 10:47:58,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:58,075 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:58,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:58,076 INFO L225 Difference]: With dead ends: 219 [2020-10-16 10:47:58,076 INFO L226 Difference]: Without dead ends: 214 [2020-10-16 10:47:58,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:47:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-16 10:47:58,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-16 10:47:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:47:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-16 10:47:58,080 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-16 10:47:58,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:58,080 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-16 10:47:58,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:58,080 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-16 10:47:58,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:58,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:58,081 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:58,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:58,282 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:58,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:58,282 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-16 10:47:58,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:58,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400175153] [2020-10-16 10:47:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:58,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400175153] [2020-10-16 10:47:58,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33782249] [2020-10-16 10:47:58,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:58,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:58,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:58,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:58,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:58,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:58,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:58,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169630941] [2020-10-16 10:47:58,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:58,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:58,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:58,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:58,533 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-16 10:47:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:58,787 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-16 10:47:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:58,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:58,788 INFO L225 Difference]: With dead ends: 197 [2020-10-16 10:47:58,788 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 10:47:58,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:58,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 10:47:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-16 10:47:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-16 10:47:58,793 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-16 10:47:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:58,793 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-16 10:47:58,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-16 10:47:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:58,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:58,794 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:58,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:58,998 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:58,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:58,998 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-16 10:47:58,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:58,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563354524] [2020-10-16 10:47:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:59,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563354524] [2020-10-16 10:47:59,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474991110] [2020-10-16 10:47:59,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:59,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:59,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:59,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:59,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:59,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:59,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046988148] [2020-10-16 10:47:59,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:59,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:59,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:59,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:59,226 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-16 10:47:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:59,499 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-16 10:47:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:59,500 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:59,500 INFO L225 Difference]: With dead ends: 202 [2020-10-16 10:47:59,500 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 10:47:59,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 10:47:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-16 10:47:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:59,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-16 10:47:59,503 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-16 10:47:59,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:59,504 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-16 10:47:59,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-16 10:47:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:59,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:59,504 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:59,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-16 10:47:59,705 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:59,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:59,706 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-16 10:47:59,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:59,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329788805] [2020-10-16 10:47:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:59,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329788805] [2020-10-16 10:47:59,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092995911] [2020-10-16 10:47:59,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:59,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:59,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:59,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:59,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:59,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:59,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:59,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023194888] [2020-10-16 10:47:59,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:59,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:59,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:59,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:59,959 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-16 10:48:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:00,233 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-16 10:48:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:48:00,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:00,234 INFO L225 Difference]: With dead ends: 197 [2020-10-16 10:48:00,235 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 10:48:00,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:48:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 10:48:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-16 10:48:00,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:48:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-16 10:48:00,238 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-16 10:48:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:00,239 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-16 10:48:00,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-16 10:48:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:00,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:00,239 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:00,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 10:48:00,440 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:00,440 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-16 10:48:00,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:00,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988398675] [2020-10-16 10:48:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:00,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988398675] [2020-10-16 10:48:00,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315419810] [2020-10-16 10:48:00,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:00,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:00,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:00,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:00,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:00,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:00,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:00,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835605451] [2020-10-16 10:48:00,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:00,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:00,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:00,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:00,761 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-16 10:48:01,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:01,343 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-16 10:48:01,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:48:01,344 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:01,345 INFO L225 Difference]: With dead ends: 214 [2020-10-16 10:48:01,345 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 10:48:01,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:48:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 10:48:01,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-16 10:48:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:48:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-16 10:48:01,351 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-16 10:48:01,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:01,352 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-16 10:48:01,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-16 10:48:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:01,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:01,353 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:01,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 10:48:01,565 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:01,566 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-16 10:48:01,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:01,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327538080] [2020-10-16 10:48:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:01,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327538080] [2020-10-16 10:48:01,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350709562] [2020-10-16 10:48:01,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:01,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:48:01,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:01,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:01,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:01,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:01,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:01,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100451428] [2020-10-16 10:48:01,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:01,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:01,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:01,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:01,831 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-16 10:48:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:02,232 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-16 10:48:02,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:48:02,232 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:02,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:02,233 INFO L225 Difference]: With dead ends: 217 [2020-10-16 10:48:02,233 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 10:48:02,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:48:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 10:48:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-16 10:48:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:48:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 10:48:02,237 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 10:48:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:02,237 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 10:48:02,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 10:48:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:02,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:02,238 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:02,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:02,448 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:02,448 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-16 10:48:02,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:02,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176126802] [2020-10-16 10:48:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:02,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176126802] [2020-10-16 10:48:02,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078632466] [2020-10-16 10:48:02,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:02,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:02,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:02,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:02,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:02,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286421777] [2020-10-16 10:48:02,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:02,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:02,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:02,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:02,698 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 10:48:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:03,105 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-16 10:48:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:48:03,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:03,107 INFO L225 Difference]: With dead ends: 211 [2020-10-16 10:48:03,107 INFO L226 Difference]: Without dead ends: 209 [2020-10-16 10:48:03,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:48:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-16 10:48:03,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-16 10:48:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 10:48:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 10:48:03,111 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 10:48:03,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:03,111 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 10:48:03,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:03,111 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 10:48:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:03,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:03,112 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:03,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:03,313 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-16 10:48:03,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:03,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153783477] [2020-10-16 10:48:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:03,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153783477] [2020-10-16 10:48:03,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472931507] [2020-10-16 10:48:03,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:03,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:03,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:03,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:03,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:03,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:48:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:03,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:03,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:03,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797958218] [2020-10-16 10:48:03,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:03,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:03,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:03,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:03,539 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 10:48:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:04,024 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-16 10:48:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:48:04,024 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:04,025 INFO L225 Difference]: With dead ends: 211 [2020-10-16 10:48:04,025 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 10:48:04,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:48:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 10:48:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-16 10:48:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 10:48:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 10:48:04,028 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 10:48:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:04,028 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 10:48:04,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 10:48:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:04,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:04,029 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:04,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 10:48:04,230 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:04,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:04,230 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-16 10:48:04,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:04,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980425840] [2020-10-16 10:48:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:04,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980425840] [2020-10-16 10:48:04,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285063007] [2020-10-16 10:48:04,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:04,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:48:04,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:04,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:04,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:04,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:48:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:04,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:04,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:04,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581854883] [2020-10-16 10:48:04,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:04,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:04,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:04,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:04,487 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 10:48:05,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:05,113 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-16 10:48:05,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:48:05,114 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:05,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:05,115 INFO L225 Difference]: With dead ends: 227 [2020-10-16 10:48:05,115 INFO L226 Difference]: Without dead ends: 222 [2020-10-16 10:48:05,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:48:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-16 10:48:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-16 10:48:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:48:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 10:48:05,119 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 10:48:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:05,119 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 10:48:05,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 10:48:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:05,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:05,120 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:05,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-16 10:48:05,321 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-16 10:48:05,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:05,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350210952] [2020-10-16 10:48:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:05,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350210952] [2020-10-16 10:48:05,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230963231] [2020-10-16 10:48:05,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:05,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:05,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:05,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:05,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:05,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:05,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:05,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962109184] [2020-10-16 10:48:05,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:05,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:05,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:05,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:05,576 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 10:48:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:06,064 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-16 10:48:06,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:48:06,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:06,065 INFO L225 Difference]: With dead ends: 221 [2020-10-16 10:48:06,065 INFO L226 Difference]: Without dead ends: 219 [2020-10-16 10:48:06,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:48:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-16 10:48:06,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-16 10:48:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 10:48:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 10:48:06,069 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 10:48:06,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:06,069 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 10:48:06,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:06,069 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 10:48:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:06,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:06,070 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:06,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:06,275 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:06,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:06,275 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-16 10:48:06,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:06,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698248265] [2020-10-16 10:48:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:06,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698248265] [2020-10-16 10:48:06,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398316570] [2020-10-16 10:48:06,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:06,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:48:06,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:06,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:06,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:06,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:48:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:06,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:06,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:06,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123813295] [2020-10-16 10:48:06,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:06,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:06,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:06,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:06,503 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 10:48:07,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:07,105 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-16 10:48:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:48:07,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:07,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:07,106 INFO L225 Difference]: With dead ends: 240 [2020-10-16 10:48:07,106 INFO L226 Difference]: Without dead ends: 232 [2020-10-16 10:48:07,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:48:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-16 10:48:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-16 10:48:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 10:48:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-16 10:48:07,111 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-16 10:48:07,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:07,111 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-16 10:48:07,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-16 10:48:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:07,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:07,112 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:07,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 10:48:07,313 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:07,314 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-16 10:48:07,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:07,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117641519] [2020-10-16 10:48:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:07,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117641519] [2020-10-16 10:48:07,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064758235] [2020-10-16 10:48:07,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:07,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:48:07,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:07,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:07,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:07,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:48:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:07,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:07,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:07,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932415773] [2020-10-16 10:48:07,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:07,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:07,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:07,617 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-16 10:48:08,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:08,413 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-16 10:48:08,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:48:08,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:08,415 INFO L225 Difference]: With dead ends: 238 [2020-10-16 10:48:08,415 INFO L226 Difference]: Without dead ends: 230 [2020-10-16 10:48:08,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:48:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-16 10:48:08,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-16 10:48:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:48:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 10:48:08,419 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 10:48:08,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:08,420 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 10:48:08,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 10:48:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:08,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:08,420 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:08,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:08,630 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:08,630 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-16 10:48:08,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:08,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189558102] [2020-10-16 10:48:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:08,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189558102] [2020-10-16 10:48:08,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160355949] [2020-10-16 10:48:08,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:08,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:08,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:08,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:08,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:08,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815118245] [2020-10-16 10:48:08,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:08,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:08,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:08,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:08,881 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 10:48:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:09,154 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-16 10:48:09,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:48:09,155 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:09,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:09,156 INFO L225 Difference]: With dead ends: 195 [2020-10-16 10:48:09,157 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 10:48:09,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:48:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 10:48:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-16 10:48:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:48:09,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 10:48:09,161 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 10:48:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:09,161 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 10:48:09,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:09,161 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 10:48:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:09,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:09,161 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:09,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-16 10:48:09,362 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:09,363 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-16 10:48:09,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:09,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666193985] [2020-10-16 10:48:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:09,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666193985] [2020-10-16 10:48:09,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994796644] [2020-10-16 10:48:09,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:09,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:09,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:09,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:09,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:09,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:09,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:09,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129054843] [2020-10-16 10:48:09,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:09,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:09,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:09,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:09,627 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 10:48:10,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:10,136 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-16 10:48:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:48:10,137 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:10,138 INFO L225 Difference]: With dead ends: 206 [2020-10-16 10:48:10,138 INFO L226 Difference]: Without dead ends: 204 [2020-10-16 10:48:10,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:48:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-16 10:48:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-16 10:48:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:48:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-16 10:48:10,141 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-16 10:48:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:10,142 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-16 10:48:10,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-16 10:48:10,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:10,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:10,142 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:10,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:10,343 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:10,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:10,343 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-16 10:48:10,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:10,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408781944] [2020-10-16 10:48:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:10,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408781944] [2020-10-16 10:48:10,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933909929] [2020-10-16 10:48:10,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:10,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:48:10,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:10,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:10,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:10,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:48:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:11,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:11,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 10:48:11,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721709540] [2020-10-16 10:48:11,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:48:11,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:11,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:48:11,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-16 10:48:11,802 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-16 10:48:14,244 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-16 10:48:35,007 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-16 10:48:55,280 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-16 10:49:13,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:13,956 INFO L93 Difference]: Finished difference Result 242 states and 573 transitions. [2020-10-16 10:49:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:49:13,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-16 10:49:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:13,989 INFO L225 Difference]: With dead ends: 242 [2020-10-16 10:49:13,989 INFO L226 Difference]: Without dead ends: 237 [2020-10-16 10:49:13,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-16 10:49:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-16 10:49:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 139. [2020-10-16 10:49:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:49:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-16 10:49:13,993 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-16 10:49:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:13,993 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-16 10:49:13,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:49:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-16 10:49:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:13,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:13,994 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:14,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-16 10:49:14,195 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:14,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:14,195 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-16 10:49:14,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:14,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505956561] [2020-10-16 10:49:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:14,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505956561] [2020-10-16 10:49:14,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032283775] [2020-10-16 10:49:14,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:14,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:14,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:14,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:14,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:14,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:14,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:14,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553378697] [2020-10-16 10:49:14,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:14,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:14,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:14,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:14,460 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-16 10:49:14,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:14,707 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-16 10:49:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:49:14,708 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:14,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:14,709 INFO L225 Difference]: With dead ends: 194 [2020-10-16 10:49:14,709 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 10:49:14,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:49:14,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 10:49:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-16 10:49:14,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:49:14,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-16 10:49:14,711 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-16 10:49:14,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:14,711 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-16 10:49:14,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-16 10:49:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:14,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:14,712 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:14,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:14,913 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-16 10:49:14,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:14,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374727467] [2020-10-16 10:49:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:15,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374727467] [2020-10-16 10:49:15,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423608771] [2020-10-16 10:49:15,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:15,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:49:15,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:15,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:15,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:15,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:15,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:15,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263464062] [2020-10-16 10:49:15,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:15,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:15,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:15,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:15,199 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-16 10:49:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:15,547 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-16 10:49:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:49:15,548 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:15,549 INFO L225 Difference]: With dead ends: 205 [2020-10-16 10:49:15,549 INFO L226 Difference]: Without dead ends: 203 [2020-10-16 10:49:15,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:49:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-16 10:49:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-16 10:49:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:49:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-16 10:49:15,553 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-16 10:49:15,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:15,554 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-16 10:49:15,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-16 10:49:15,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:15,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:15,554 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:15,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:15,755 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:15,756 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-16 10:49:15,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:15,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190036277] [2020-10-16 10:49:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:15,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190036277] [2020-10-16 10:49:15,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472061828] [2020-10-16 10:49:15,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:15,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:49:15,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:15,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:16,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:16,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:16,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555133942] [2020-10-16 10:49:16,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:16,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:16,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:16,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:16,039 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-16 10:49:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:16,323 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-16 10:49:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:49:16,323 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:16,324 INFO L225 Difference]: With dead ends: 201 [2020-10-16 10:49:16,324 INFO L226 Difference]: Without dead ends: 199 [2020-10-16 10:49:16,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:49:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-16 10:49:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-16 10:49:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 10:49:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-16 10:49:16,328 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-16 10:49:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:16,328 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-16 10:49:16,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-16 10:49:16,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:16,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:16,329 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:16,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:16,530 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-16 10:49:16,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:16,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225208930] [2020-10-16 10:49:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:16,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225208930] [2020-10-16 10:49:16,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325904472] [2020-10-16 10:49:16,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:16,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:16,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:16,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:16,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240340650] [2020-10-16 10:49:16,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:16,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:16,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:16,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:16,900 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-16 10:49:17,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:17,270 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-16 10:49:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:49:17,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:17,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:17,272 INFO L225 Difference]: With dead ends: 194 [2020-10-16 10:49:17,272 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 10:49:17,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:49:17,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 10:49:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-16 10:49:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:49:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-16 10:49:17,278 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-16 10:49:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:17,278 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-16 10:49:17,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:17,278 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-16 10:49:17,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:17,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:17,279 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:17,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 10:49:17,491 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-16 10:49:17,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:17,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645189551] [2020-10-16 10:49:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:17,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645189551] [2020-10-16 10:49:17,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658167440] [2020-10-16 10:49:17,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:17,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:17,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:17,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:17,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:17,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:17,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:17,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309398567] [2020-10-16 10:49:17,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:17,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:17,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:17,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:17,910 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-16 10:49:18,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:18,469 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-16 10:49:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:49:18,470 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:18,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:18,472 INFO L225 Difference]: With dead ends: 209 [2020-10-16 10:49:18,472 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 10:49:18,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:49:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 10:49:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-16 10:49:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:49:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-16 10:49:18,477 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-16 10:49:18,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:18,478 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-16 10:49:18,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-16 10:49:18,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:18,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:18,479 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:18,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:18,691 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:18,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-16 10:49:18,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:18,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822645348] [2020-10-16 10:49:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:18,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822645348] [2020-10-16 10:49:18,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11493118] [2020-10-16 10:49:18,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:18,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:49:18,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:18,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:18,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:19,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:19,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:19,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383106315] [2020-10-16 10:49:19,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:19,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:19,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:19,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:19,108 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-16 10:49:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:19,541 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-16 10:49:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:49:19,542 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:19,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:19,543 INFO L225 Difference]: With dead ends: 202 [2020-10-16 10:49:19,543 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 10:49:19,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:49:19,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 10:49:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-16 10:49:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:49:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-16 10:49:19,547 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-16 10:49:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:19,547 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-16 10:49:19,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-16 10:49:19,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:19,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:19,548 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:19,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 10:49:19,759 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:19,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:19,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-16 10:49:19,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:19,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948561441] [2020-10-16 10:49:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:19,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948561441] [2020-10-16 10:49:19,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671042899] [2020-10-16 10:49:19,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:19,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:19,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:19,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:19,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:20,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:20,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:20,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784776030] [2020-10-16 10:49:20,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:20,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:20,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:20,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:20,035 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-16 10:49:20,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:20,373 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-16 10:49:20,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:49:20,374 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:20,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:20,375 INFO L225 Difference]: With dead ends: 201 [2020-10-16 10:49:20,376 INFO L226 Difference]: Without dead ends: 199 [2020-10-16 10:49:20,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:49:20,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-16 10:49:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-16 10:49:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:49:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-16 10:49:20,380 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-16 10:49:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:20,380 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-16 10:49:20,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-16 10:49:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:20,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:20,381 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:20,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 10:49:20,582 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-16 10:49:20,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:20,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68132721] [2020-10-16 10:49:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:20,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68132721] [2020-10-16 10:49:20,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002194066] [2020-10-16 10:49:20,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:20,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:49:20,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:20,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:20,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:20,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:20,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:20,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713401387] [2020-10-16 10:49:20,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:20,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:20,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:20,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:20,869 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-16 10:49:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:21,347 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-16 10:49:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:49:21,348 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:21,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:21,349 INFO L225 Difference]: With dead ends: 215 [2020-10-16 10:49:21,349 INFO L226 Difference]: Without dead ends: 213 [2020-10-16 10:49:21,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:49:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-16 10:49:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-16 10:49:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:49:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 10:49:21,352 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 10:49:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:21,352 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 10:49:21,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 10:49:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:21,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:21,353 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:21,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:21,557 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-16 10:49:21,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:21,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651578299] [2020-10-16 10:49:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:21,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651578299] [2020-10-16 10:49:21,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963356189] [2020-10-16 10:49:21,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:21,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:49:21,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:21,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:21,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:21,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:21,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:21,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266310675] [2020-10-16 10:49:21,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:21,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:21,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:21,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:21,844 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 10:49:22,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:22,265 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-16 10:49:22,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:49:22,266 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:22,267 INFO L225 Difference]: With dead ends: 196 [2020-10-16 10:49:22,268 INFO L226 Difference]: Without dead ends: 194 [2020-10-16 10:49:22,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:49:22,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-16 10:49:22,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-16 10:49:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:49:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 10:49:22,272 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 10:49:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:22,273 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 10:49:22,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 10:49:22,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:22,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:22,274 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:22,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:22,487 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:22,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:22,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-16 10:49:22,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:22,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911713319] [2020-10-16 10:49:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:22,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911713319] [2020-10-16 10:49:22,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325655852] [2020-10-16 10:49:22,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:22,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:22,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:22,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:49:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:22,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:22,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:22,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864449802] [2020-10-16 10:49:22,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:22,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:22,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:22,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:22,730 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 10:49:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:23,044 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-16 10:49:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:49:23,045 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:23,045 INFO L225 Difference]: With dead ends: 191 [2020-10-16 10:49:23,045 INFO L226 Difference]: Without dead ends: 186 [2020-10-16 10:49:23,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:49:23,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-16 10:49:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-16 10:49:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:49:23,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 10:49:23,050 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 10:49:23,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:23,050 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 10:49:23,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 10:49:23,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:23,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:23,051 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:23,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 10:49:23,254 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:23,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-16 10:49:23,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:23,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105914289] [2020-10-16 10:49:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:23,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105914289] [2020-10-16 10:49:23,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083871989] [2020-10-16 10:49:23,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:23,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:23,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:23,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:23,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:23,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:49:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:23,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:23,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:23,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162455986] [2020-10-16 10:49:23,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:23,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:23,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:23,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:23,613 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 10:49:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:24,401 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-16 10:49:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:49:24,401 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:24,402 INFO L225 Difference]: With dead ends: 232 [2020-10-16 10:49:24,402 INFO L226 Difference]: Without dead ends: 227 [2020-10-16 10:49:24,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:49:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-16 10:49:24,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-16 10:49:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:49:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 10:49:24,406 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 10:49:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:24,407 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 10:49:24,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 10:49:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:24,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:24,407 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:24,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:24,617 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:24,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:24,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-16 10:49:24,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:24,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57775871] [2020-10-16 10:49:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:24,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57775871] [2020-10-16 10:49:24,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006657296] [2020-10-16 10:49:24,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:24,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:49:24,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:24,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:24,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:24,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:24,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:24,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966751121] [2020-10-16 10:49:24,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:24,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:24,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:24,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:24,912 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 10:49:25,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:25,493 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-16 10:49:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:49:25,494 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:25,495 INFO L225 Difference]: With dead ends: 222 [2020-10-16 10:49:25,495 INFO L226 Difference]: Without dead ends: 220 [2020-10-16 10:49:25,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:49:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-16 10:49:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-16 10:49:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:49:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 10:49:25,499 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 10:49:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:25,499 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 10:49:25,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 10:49:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:25,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:25,499 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:25,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:25,700 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:25,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:25,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-16 10:49:25,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:25,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516247731] [2020-10-16 10:49:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:25,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516247731] [2020-10-16 10:49:25,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479995658] [2020-10-16 10:49:25,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:25,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:25,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:25,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:25,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:25,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:49:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:26,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:26,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:26,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100869793] [2020-10-16 10:49:26,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:26,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:26,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:26,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:26,010 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 10:49:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:26,863 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-16 10:49:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:49:26,864 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:26,865 INFO L225 Difference]: With dead ends: 254 [2020-10-16 10:49:26,865 INFO L226 Difference]: Without dead ends: 246 [2020-10-16 10:49:26,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:49:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-16 10:49:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-16 10:49:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 10:49:26,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-16 10:49:26,870 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-16 10:49:26,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:26,870 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-16 10:49:26,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:26,870 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-16 10:49:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:26,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:26,871 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:27,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:27,080 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:27,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-16 10:49:27,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:27,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107480496] [2020-10-16 10:49:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:27,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107480496] [2020-10-16 10:49:27,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955063889] [2020-10-16 10:49:27,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:27,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:49:27,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:27,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:27,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:27,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:49:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:27,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:27,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:27,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942898260] [2020-10-16 10:49:27,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:27,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:27,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:27,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:27,371 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-16 10:49:28,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:28,204 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-16 10:49:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:49:28,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:28,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:28,206 INFO L225 Difference]: With dead ends: 246 [2020-10-16 10:49:28,206 INFO L226 Difference]: Without dead ends: 238 [2020-10-16 10:49:28,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:49:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-16 10:49:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-16 10:49:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:49:28,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-16 10:49:28,211 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-16 10:49:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:28,212 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-16 10:49:28,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-16 10:49:28,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:28,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:28,213 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:28,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-16 10:49:28,426 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:28,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-16 10:49:28,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:28,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996702801] [2020-10-16 10:49:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:28,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996702801] [2020-10-16 10:49:28,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882485131] [2020-10-16 10:49:28,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:28,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:49:28,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:28,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:28,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:28,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:28,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:28,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534965218] [2020-10-16 10:49:28,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:28,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:28,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:28,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:28,695 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-16 10:49:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:29,129 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-16 10:49:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:49:29,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:29,130 INFO L225 Difference]: With dead ends: 208 [2020-10-16 10:49:29,130 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 10:49:29,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:49:29,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 10:49:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-16 10:49:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 10:49:29,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-16 10:49:29,133 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-16 10:49:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:29,134 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-16 10:49:29,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-16 10:49:29,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:29,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:29,135 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:29,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 10:49:29,337 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:29,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:29,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-16 10:49:29,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:29,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810615518] [2020-10-16 10:49:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:29,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810615518] [2020-10-16 10:49:29,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627848063] [2020-10-16 10:49:29,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:29,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:29,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:29,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:29,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205004754] [2020-10-16 10:49:29,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:29,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:29,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:29,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:29,611 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-16 10:49:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:30,221 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-16 10:49:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:49:30,221 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:30,223 INFO L225 Difference]: With dead ends: 215 [2020-10-16 10:49:30,223 INFO L226 Difference]: Without dead ends: 213 [2020-10-16 10:49:30,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:49:30,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-16 10:49:30,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-16 10:49:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 10:49:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 10:49:30,227 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 10:49:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:30,227 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 10:49:30,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 10:49:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:30,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:30,228 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:30,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-16 10:49:30,430 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:30,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-16 10:49:30,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:30,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406262130] [2020-10-16 10:49:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:30,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406262130] [2020-10-16 10:49:30,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898734801] [2020-10-16 10:49:30,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:30,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:30,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:30,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:30,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:30,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:49:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:30,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:30,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:30,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290484199] [2020-10-16 10:49:30,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:30,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:30,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:30,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:30,700 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 10:49:31,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:31,361 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-16 10:49:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:49:31,362 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:31,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:31,363 INFO L225 Difference]: With dead ends: 236 [2020-10-16 10:49:31,363 INFO L226 Difference]: Without dead ends: 228 [2020-10-16 10:49:31,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:49:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-16 10:49:31,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-16 10:49:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 10:49:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 10:49:31,366 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 10:49:31,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:31,367 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 10:49:31,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 10:49:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:31,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:31,367 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:31,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 10:49:31,568 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:31,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:31,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-16 10:49:31,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:31,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100262998] [2020-10-16 10:49:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:31,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100262998] [2020-10-16 10:49:31,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475103531] [2020-10-16 10:49:31,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:31,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:49:31,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:31,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:31,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:31,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:49:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:31,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:31,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:31,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761946199] [2020-10-16 10:49:31,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:31,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:31,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:31,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:31,835 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 10:49:32,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:32,523 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-16 10:49:32,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:49:32,524 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:32,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:32,525 INFO L225 Difference]: With dead ends: 241 [2020-10-16 10:49:32,525 INFO L226 Difference]: Without dead ends: 233 [2020-10-16 10:49:32,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:49:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-16 10:49:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-16 10:49:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-16 10:49:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-16 10:49:32,528 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-16 10:49:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:32,528 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-16 10:49:32,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-16 10:49:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:32,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:32,529 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:32,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 10:49:32,736 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:32,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-16 10:49:32,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:32,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561299823] [2020-10-16 10:49:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:32,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561299823] [2020-10-16 10:49:32,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513934100] [2020-10-16 10:49:32,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:32,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:32,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:32,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:32,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:32,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:49:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:33,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:33,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:33,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665529354] [2020-10-16 10:49:33,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:33,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:33,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:33,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:33,002 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-16 10:49:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:33,651 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-16 10:49:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:49:33,652 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:33,653 INFO L225 Difference]: With dead ends: 232 [2020-10-16 10:49:33,653 INFO L226 Difference]: Without dead ends: 224 [2020-10-16 10:49:33,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:49:33,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-16 10:49:33,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-16 10:49:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 10:49:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-16 10:49:33,658 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-16 10:49:33,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:33,659 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-16 10:49:33,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:33,659 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-16 10:49:33,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:33,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:33,659 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:33,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:33,860 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:33,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:33,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-16 10:49:33,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:33,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499101421] [2020-10-16 10:49:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:33,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499101421] [2020-10-16 10:49:33,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074661180] [2020-10-16 10:49:33,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:34,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 10:49:34,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:34,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:34,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:34,235 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:49:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:34,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:34,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-16 10:49:34,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994947963] [2020-10-16 10:49:34,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:49:34,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:34,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:49:34,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:49:34,283 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-16 10:49:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:34,552 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-16 10:49:34,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:49:34,553 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-16 10:49:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:34,554 INFO L225 Difference]: With dead ends: 185 [2020-10-16 10:49:34,554 INFO L226 Difference]: Without dead ends: 180 [2020-10-16 10:49:34,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:49:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-16 10:49:34,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-16 10:49:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:49:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-16 10:49:34,558 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-16 10:49:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:34,559 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-16 10:49:34,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:49:34,559 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-16 10:49:34,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:34,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:34,560 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:34,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-16 10:49:34,772 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:34,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-16 10:49:34,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:34,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806561442] [2020-10-16 10:49:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:34,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806561442] [2020-10-16 10:49:34,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007464532] [2020-10-16 10:49:34,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:34,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:49:34,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:34,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:34,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:35,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:35,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:35,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576341517] [2020-10-16 10:49:35,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:35,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:35,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:35,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:35,184 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-16 10:49:35,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:35,249 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-16 10:49:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:49:35,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 10:49:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:35,252 INFO L225 Difference]: With dead ends: 180 [2020-10-16 10:49:35,252 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 10:49:35,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:35,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 10:49:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-16 10:49:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 10:49:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-16 10:49:35,255 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-16 10:49:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:35,255 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-16 10:49:35,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-16 10:49:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:35,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:35,256 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:35,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 10:49:35,457 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:35,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-16 10:49:35,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:35,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239212039] [2020-10-16 10:49:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:35,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239212039] [2020-10-16 10:49:35,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758654989] [2020-10-16 10:49:35,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:35,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:35,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:35,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:35,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:35,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:35,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:35,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430801551] [2020-10-16 10:49:35,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:35,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:35,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:35,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:35,863 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-16 10:49:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:35,945 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-16 10:49:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:49:35,945 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 10:49:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:35,946 INFO L225 Difference]: With dead ends: 197 [2020-10-16 10:49:35,946 INFO L226 Difference]: Without dead ends: 194 [2020-10-16 10:49:35,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:49:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-16 10:49:35,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-16 10:49:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 10:49:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-16 10:49:35,950 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-16 10:49:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:35,950 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-16 10:49:35,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:35,950 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-16 10:49:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:35,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:35,951 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:36,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:36,161 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:36,161 INFO L82 PathProgramCache]: Analyzing trace with hash 551260342, now seen corresponding path program 23 times [2020-10-16 10:49:36,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:36,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940681835] [2020-10-16 10:49:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:36,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940681835] [2020-10-16 10:49:36,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390905844] [2020-10-16 10:49:36,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:36,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 10:49:36,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:36,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:36,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:36,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:36,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:36,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763943071] [2020-10-16 10:49:36,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:36,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:36,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:36,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:36,538 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-16 10:49:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:36,692 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-16 10:49:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:49:36,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 10:49:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:36,695 INFO L225 Difference]: With dead ends: 196 [2020-10-16 10:49:36,695 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 10:49:36,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:49:36,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 10:49:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-16 10:49:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-16 10:49:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-16 10:49:36,701 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-16 10:49:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:36,701 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-16 10:49:36,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-16 10:49:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:36,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:36,702 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:36,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:36,913 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:36,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:36,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1216195462, now seen corresponding path program 24 times [2020-10-16 10:49:36,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:36,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437981435] [2020-10-16 10:49:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:37,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437981435] [2020-10-16 10:49:37,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408295432] [2020-10-16 10:49:37,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:37,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 10:49:37,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:37,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:37,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:37,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:37,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:37,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831006569] [2020-10-16 10:49:37,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:37,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:37,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:37,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:37,258 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-16 10:49:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:37,393 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-16 10:49:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:49:37,394 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 10:49:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:37,395 INFO L225 Difference]: With dead ends: 195 [2020-10-16 10:49:37,395 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 10:49:37,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:49:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 10:49:37,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-16 10:49:37,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-16 10:49:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-16 10:49:37,399 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-16 10:49:37,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:37,400 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-16 10:49:37,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:37,400 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-16 10:49:37,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:37,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:37,400 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:37,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:37,601 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:37,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:37,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1237644982, now seen corresponding path program 25 times [2020-10-16 10:49:37,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:37,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752501687] [2020-10-16 10:49:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:37,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752501687] [2020-10-16 10:49:37,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923771079] [2020-10-16 10:49:37,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:37,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:37,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:37,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:37,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:37,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970543882] [2020-10-16 10:49:37,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:37,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:37,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:37,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:37,973 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-16 10:49:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:38,162 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-16 10:49:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:49:38,162 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 10:49:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:38,163 INFO L225 Difference]: With dead ends: 194 [2020-10-16 10:49:38,164 INFO L226 Difference]: Without dead ends: 191 [2020-10-16 10:49:38,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:49:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-16 10:49:38,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-16 10:49:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-16 10:49:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-16 10:49:38,169 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-16 10:49:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:38,169 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-16 10:49:38,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-16 10:49:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:38,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:38,170 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:38,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:38,380 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:38,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:38,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1238336902, now seen corresponding path program 26 times [2020-10-16 10:49:38,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:38,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838013860] [2020-10-16 10:49:38,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:38,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838013860] [2020-10-16 10:49:38,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181664236] [2020-10-16 10:49:38,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:38,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:38,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:38,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:38,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:38,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:38,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:38,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120561326] [2020-10-16 10:49:38,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:38,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:38,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:38,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:38,751 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-16 10:49:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:38,974 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-16 10:49:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:49:38,975 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 10:49:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:38,976 INFO L225 Difference]: With dead ends: 193 [2020-10-16 10:49:38,976 INFO L226 Difference]: Without dead ends: 190 [2020-10-16 10:49:38,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:49:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-16 10:49:38,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-16 10:49:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-16 10:49:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-16 10:49:38,980 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-16 10:49:38,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:38,980 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-16 10:49:38,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-16 10:49:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:38,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:38,980 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:39,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-16 10:49:39,181 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1238359222, now seen corresponding path program 27 times [2020-10-16 10:49:39,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:39,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676917471] [2020-10-16 10:49:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:39,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676917471] [2020-10-16 10:49:39,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665199792] [2020-10-16 10:49:39,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:39,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:49:39,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:39,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:39,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:39,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:49:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:39,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:39,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:39,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076248257] [2020-10-16 10:49:39,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:39,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:39,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:39,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:39,519 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-16 10:49:39,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:39,794 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-16 10:49:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:49:39,795 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 10:49:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:39,796 INFO L225 Difference]: With dead ends: 202 [2020-10-16 10:49:39,797 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 10:49:39,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:49:39,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 10:49:39,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-16 10:49:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-16 10:49:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-16 10:49:39,800 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-16 10:49:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:39,801 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-16 10:49:39,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-16 10:49:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:39,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:39,802 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:40,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 10:49:40,011 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:40,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-16 10:49:40,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:40,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690828701] [2020-10-16 10:49:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:40,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690828701] [2020-10-16 10:49:40,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781895250] [2020-10-16 10:49:40,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:40,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:49:40,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:40,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:40,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:40,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:40,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:40,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9447633] [2020-10-16 10:49:40,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:40,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:40,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:40,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:40,387 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-16 10:49:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:40,448 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-16 10:49:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:49:40,449 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:40,450 INFO L225 Difference]: With dead ends: 188 [2020-10-16 10:49:40,450 INFO L226 Difference]: Without dead ends: 186 [2020-10-16 10:49:40,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-16 10:49:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-16 10:49:40,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-16 10:49:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-16 10:49:40,454 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-16 10:49:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:40,454 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-16 10:49:40,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-16 10:49:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:40,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:40,455 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:40,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 10:49:40,656 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:40,656 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-16 10:49:40,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:40,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131661891] [2020-10-16 10:49:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:40,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131661891] [2020-10-16 10:49:40,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840387706] [2020-10-16 10:49:40,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:40,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:49:40,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:40,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:41,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:41,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:41,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293038697] [2020-10-16 10:49:41,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:41,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:41,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:41,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:41,014 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-16 10:49:41,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:41,254 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-16 10:49:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:49:41,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:41,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:41,255 INFO L225 Difference]: With dead ends: 199 [2020-10-16 10:49:41,255 INFO L226 Difference]: Without dead ends: 197 [2020-10-16 10:49:41,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:49:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-16 10:49:41,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-16 10:49:41,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-16 10:49:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-16 10:49:41,258 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-16 10:49:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:41,258 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-16 10:49:41,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-16 10:49:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:41,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:41,258 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:41,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 10:49:41,459 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:41,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:41,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-16 10:49:41,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:41,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333376634] [2020-10-16 10:49:41,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:41,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333376634] [2020-10-16 10:49:41,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410234256] [2020-10-16 10:49:41,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:41,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:41,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:41,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:41,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:41,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895071893] [2020-10-16 10:49:41,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:41,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:41,896 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-16 10:49:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:42,221 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-16 10:49:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:49:42,222 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:42,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:42,223 INFO L225 Difference]: With dead ends: 210 [2020-10-16 10:49:42,223 INFO L226 Difference]: Without dead ends: 208 [2020-10-16 10:49:42,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:49:42,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-16 10:49:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-16 10:49:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-16 10:49:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-16 10:49:42,227 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-16 10:49:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:42,227 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-16 10:49:42,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-16 10:49:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:42,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:42,227 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:42,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 10:49:42,428 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-16 10:49:42,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:42,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543881608] [2020-10-16 10:49:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:42,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543881608] [2020-10-16 10:49:42,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039519217] [2020-10-16 10:49:42,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:42,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:42,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:42,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:42,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:45,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:45,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:45,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900010987] [2020-10-16 10:49:45,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:45,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:45,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:45,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:45,213 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-16 10:49:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:45,574 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-16 10:49:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:49:45,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:45,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:45,575 INFO L225 Difference]: With dead ends: 210 [2020-10-16 10:49:45,575 INFO L226 Difference]: Without dead ends: 208 [2020-10-16 10:49:45,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:49:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-16 10:49:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-16 10:49:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-16 10:49:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-16 10:49:45,579 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-16 10:49:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:45,580 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-16 10:49:45,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-16 10:49:45,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:45,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:45,580 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:45,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-16 10:49:45,784 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:45,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-16 10:49:45,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:45,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009876363] [2020-10-16 10:49:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:45,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009876363] [2020-10-16 10:49:45,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084678849] [2020-10-16 10:49:45,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:45,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:49:45,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:45,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:45,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:50,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:50,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:50,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372138777] [2020-10-16 10:49:50,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:50,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:50,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:50,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:49:50,416 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-16 10:49:54,664 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 10:49:54,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:54,965 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-16 10:49:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:49:54,966 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:54,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:54,967 INFO L225 Difference]: With dead ends: 218 [2020-10-16 10:49:54,967 INFO L226 Difference]: Without dead ends: 216 [2020-10-16 10:49:54,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-16 10:49:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-16 10:49:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-16 10:49:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 10:49:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 10:49:54,971 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 10:49:54,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:54,971 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 10:49:54,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:54,971 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 10:49:54,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:54,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:54,972 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:55,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:55,173 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:55,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:55,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-16 10:49:55,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:55,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798777439] [2020-10-16 10:49:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:55,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798777439] [2020-10-16 10:49:55,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589542816] [2020-10-16 10:49:55,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:55,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:55,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:55,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:55,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:55,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:55,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:55,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448059947] [2020-10-16 10:49:55,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:55,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:55,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:55,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:55,614 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 10:49:56,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:56,004 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-16 10:49:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:49:56,004 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:56,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:56,005 INFO L225 Difference]: With dead ends: 212 [2020-10-16 10:49:56,005 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 10:49:56,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:49:56,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 10:49:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-16 10:49:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-16 10:49:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-16 10:49:56,009 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-16 10:49:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:56,009 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-16 10:49:56,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-16 10:49:56,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:56,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:56,010 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:56,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:56,211 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:56,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:56,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-16 10:49:56,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:56,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604931620] [2020-10-16 10:49:56,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:56,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604931620] [2020-10-16 10:49:56,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268329323] [2020-10-16 10:49:56,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:56,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:49:56,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:56,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:56,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:56,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:56,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:56,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990816189] [2020-10-16 10:49:56,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:56,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:56,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:56,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:56,572 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-16 10:49:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:56,949 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-16 10:49:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:49:56,950 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:56,951 INFO L225 Difference]: With dead ends: 212 [2020-10-16 10:49:56,951 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 10:49:56,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:49:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 10:49:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-16 10:49:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 10:49:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 10:49:56,955 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 10:49:56,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:56,955 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 10:49:56,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 10:49:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:56,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:56,956 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:57,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:57,156 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-16 10:49:57,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:57,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860336384] [2020-10-16 10:49:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:57,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860336384] [2020-10-16 10:49:57,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077954913] [2020-10-16 10:49:57,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:57,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:49:57,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:57,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:57,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:57,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:57,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:57,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168648880] [2020-10-16 10:49:57,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:57,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:57,512 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 10:49:57,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:57,885 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-16 10:49:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:49:57,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:57,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:57,886 INFO L225 Difference]: With dead ends: 224 [2020-10-16 10:49:57,886 INFO L226 Difference]: Without dead ends: 222 [2020-10-16 10:49:57,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:49:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-16 10:49:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-16 10:49:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 10:49:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 10:49:57,891 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 10:49:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:57,891 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 10:49:57,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 10:49:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:57,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:57,892 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:58,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:58,101 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:58,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:58,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-16 10:49:58,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:58,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893943627] [2020-10-16 10:49:58,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:58,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893943627] [2020-10-16 10:49:58,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818549499] [2020-10-16 10:49:58,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:58,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:58,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:58,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:58,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:58,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907012839] [2020-10-16 10:49:58,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:58,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:58,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:58,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:58,483 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 10:49:58,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:58,884 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-16 10:49:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:49:58,885 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:58,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:58,886 INFO L225 Difference]: With dead ends: 218 [2020-10-16 10:49:58,886 INFO L226 Difference]: Without dead ends: 216 [2020-10-16 10:49:58,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:49:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-16 10:49:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-16 10:49:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 10:49:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 10:49:58,890 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 10:49:58,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:58,890 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 10:49:58,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 10:49:58,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:58,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:58,891 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:59,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:59,101 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:59,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-16 10:49:59,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:59,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584064137] [2020-10-16 10:49:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:59,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584064137] [2020-10-16 10:49:59,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100739170] [2020-10-16 10:49:59,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:59,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:59,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:59,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:59,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:59,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:59,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:59,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024222413] [2020-10-16 10:49:59,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:59,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:59,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:59,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:59,513 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 10:49:59,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:59,848 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-16 10:49:59,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:49:59,849 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:59,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:59,850 INFO L225 Difference]: With dead ends: 206 [2020-10-16 10:49:59,850 INFO L226 Difference]: Without dead ends: 204 [2020-10-16 10:49:59,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:49:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-16 10:49:59,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-16 10:49:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-16 10:49:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-16 10:49:59,853 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-16 10:49:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:59,853 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-16 10:49:59,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-16 10:49:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:59,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:59,854 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:00,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 10:50:00,055 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:00,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-16 10:50:00,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:00,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167040932] [2020-10-16 10:50:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:00,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167040932] [2020-10-16 10:50:00,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128201107] [2020-10-16 10:50:00,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:00,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:50:00,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:00,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:00,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:00,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:00,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:00,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706301019] [2020-10-16 10:50:00,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:00,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:00,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:00,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:00,474 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-16 10:50:00,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:00,827 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-16 10:50:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:50:00,828 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:00,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:00,829 INFO L225 Difference]: With dead ends: 207 [2020-10-16 10:50:00,829 INFO L226 Difference]: Without dead ends: 205 [2020-10-16 10:50:00,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:50:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-16 10:50:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-16 10:50:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-16 10:50:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-16 10:50:00,833 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-16 10:50:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:00,834 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-16 10:50:00,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-16 10:50:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:00,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:00,834 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:01,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 10:50:01,039 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-16 10:50:01,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:01,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015501666] [2020-10-16 10:50:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:01,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015501666] [2020-10-16 10:50:01,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521438658] [2020-10-16 10:50:01,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:01,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:50:01,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:01,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:01,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:01,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:01,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:01,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307603736] [2020-10-16 10:50:01,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:01,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:01,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:01,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:01,393 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-16 10:50:01,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:01,722 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-16 10:50:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:50:01,723 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:01,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:01,723 INFO L225 Difference]: With dead ends: 217 [2020-10-16 10:50:01,723 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 10:50:01,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:50:01,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 10:50:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-16 10:50:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-16 10:50:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-16 10:50:01,726 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-16 10:50:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:01,727 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-16 10:50:01,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-16 10:50:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:01,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:01,727 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:01,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 10:50:01,928 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:01,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:01,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-16 10:50:01,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:01,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990629442] [2020-10-16 10:50:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:02,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990629442] [2020-10-16 10:50:02,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256641634] [2020-10-16 10:50:02,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:02,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:50:02,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:02,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:02,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:02,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:02,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:02,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917012697] [2020-10-16 10:50:02,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:02,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:02,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:02,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:02,429 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-16 10:50:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:02,840 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-16 10:50:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:50:02,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:02,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:02,841 INFO L225 Difference]: With dead ends: 223 [2020-10-16 10:50:02,841 INFO L226 Difference]: Without dead ends: 221 [2020-10-16 10:50:02,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:50:02,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-16 10:50:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-16 10:50:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-16 10:50:02,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-16 10:50:02,845 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-16 10:50:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:02,845 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-16 10:50:02,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-16 10:50:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:02,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:02,846 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:03,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 10:50:03,050 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:03,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-16 10:50:03,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:03,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962855294] [2020-10-16 10:50:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:03,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962855294] [2020-10-16 10:50:03,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796203957] [2020-10-16 10:50:03,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:03,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:50:03,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:03,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:03,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:03,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:03,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:03,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383994769] [2020-10-16 10:50:03,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:03,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:03,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:03,402 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-16 10:50:03,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:03,721 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-16 10:50:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:50:03,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:03,722 INFO L225 Difference]: With dead ends: 225 [2020-10-16 10:50:03,723 INFO L226 Difference]: Without dead ends: 223 [2020-10-16 10:50:03,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:50:03,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-16 10:50:03,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-16 10:50:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-16 10:50:03,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-16 10:50:03,726 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-16 10:50:03,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:03,726 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-16 10:50:03,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:03,727 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-16 10:50:03,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:03,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:03,727 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:03,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:03,928 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:03,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-16 10:50:03,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:03,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746856169] [2020-10-16 10:50:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:04,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746856169] [2020-10-16 10:50:04,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273191043] [2020-10-16 10:50:04,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:04,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:04,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:04,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:04,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:04,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982651662] [2020-10-16 10:50:04,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:04,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:04,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:04,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:04,308 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-16 10:50:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:04,629 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-16 10:50:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:50:04,630 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:04,630 INFO L225 Difference]: With dead ends: 214 [2020-10-16 10:50:04,631 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 10:50:04,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:50:04,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 10:50:04,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-16 10:50:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-16 10:50:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-16 10:50:04,634 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-16 10:50:04,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:04,634 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-16 10:50:04,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-16 10:50:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:04,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:04,635 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:04,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:04,836 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:04,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:04,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-16 10:50:04,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:04,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460243933] [2020-10-16 10:50:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:04,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460243933] [2020-10-16 10:50:04,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882391094] [2020-10-16 10:50:04,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:05,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:05,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:05,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:05,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:05,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:05,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:05,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518308942] [2020-10-16 10:50:05,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:05,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:05,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:05,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:05,225 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-16 10:50:05,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:05,456 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-16 10:50:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:50:05,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:05,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:05,457 INFO L225 Difference]: With dead ends: 203 [2020-10-16 10:50:05,458 INFO L226 Difference]: Without dead ends: 201 [2020-10-16 10:50:05,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:50:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-16 10:50:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-16 10:50:05,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-16 10:50:05,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-16 10:50:05,461 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-16 10:50:05,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:05,462 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-16 10:50:05,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-16 10:50:05,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:05,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:05,462 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:05,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-16 10:50:05,663 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:05,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:05,664 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-16 10:50:05,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:05,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984452395] [2020-10-16 10:50:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:05,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984452395] [2020-10-16 10:50:05,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874021039] [2020-10-16 10:50:05,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:05,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:50:05,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:05,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:05,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:06,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:06,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:06,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981487365] [2020-10-16 10:50:06,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:06,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:06,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:06,075 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-16 10:50:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:06,159 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-16 10:50:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:50:06,160 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:06,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:06,160 INFO L225 Difference]: With dead ends: 212 [2020-10-16 10:50:06,160 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 10:50:06,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:50:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 10:50:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-16 10:50:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-16 10:50:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-16 10:50:06,164 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-16 10:50:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:06,164 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-16 10:50:06,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-16 10:50:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:06,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:06,164 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:06,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:06,365 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-16 10:50:06,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:06,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936541745] [2020-10-16 10:50:06,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:06,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936541745] [2020-10-16 10:50:06,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232697952] [2020-10-16 10:50:06,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:06,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:50:06,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:06,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:06,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:06,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:06,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443673985] [2020-10-16 10:50:06,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:06,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:06,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:06,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:06,762 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-16 10:50:07,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:07,042 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-16 10:50:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:50:07,042 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:07,043 INFO L225 Difference]: With dead ends: 217 [2020-10-16 10:50:07,043 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 10:50:07,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:50:07,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 10:50:07,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-16 10:50:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-16 10:50:07,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-16 10:50:07,047 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-16 10:50:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:07,047 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-16 10:50:07,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-16 10:50:07,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:07,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:07,047 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:07,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:07,248 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:07,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:07,249 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-16 10:50:07,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:07,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608709902] [2020-10-16 10:50:07,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:07,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608709902] [2020-10-16 10:50:07,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051865293] [2020-10-16 10:50:07,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:07,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:50:07,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:07,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:07,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:07,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:07,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:07,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899618230] [2020-10-16 10:50:07,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:07,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:07,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:07,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:07,682 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-16 10:50:08,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:08,039 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-16 10:50:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:50:08,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:08,041 INFO L225 Difference]: With dead ends: 227 [2020-10-16 10:50:08,041 INFO L226 Difference]: Without dead ends: 225 [2020-10-16 10:50:08,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:50:08,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-16 10:50:08,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-16 10:50:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-16 10:50:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-16 10:50:08,045 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-16 10:50:08,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:08,045 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-16 10:50:08,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-16 10:50:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:08,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:08,046 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:08,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:08,247 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:08,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:08,247 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-16 10:50:08,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:08,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077702413] [2020-10-16 10:50:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:08,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077702413] [2020-10-16 10:50:08,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735107738] [2020-10-16 10:50:08,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:08,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:50:08,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:08,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:08,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:08,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:08,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:08,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094932054] [2020-10-16 10:50:08,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:08,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:08,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:08,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:08,683 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-16 10:50:09,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:09,162 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-16 10:50:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:50:09,163 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:09,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:09,164 INFO L225 Difference]: With dead ends: 227 [2020-10-16 10:50:09,164 INFO L226 Difference]: Without dead ends: 225 [2020-10-16 10:50:09,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:50:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-16 10:50:09,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-16 10:50:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-16 10:50:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-16 10:50:09,167 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-16 10:50:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:09,167 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-16 10:50:09,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-16 10:50:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:09,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:09,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:09,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-16 10:50:09,370 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:09,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-16 10:50:09,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:09,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627679071] [2020-10-16 10:50:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:09,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627679071] [2020-10-16 10:50:09,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283937202] [2020-10-16 10:50:09,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:09,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:09,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:14,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:14,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:14,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392111217] [2020-10-16 10:50:14,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:14,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:14,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:14,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:50:14,243 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-16 10:50:18,476 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 10:50:18,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:18,855 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-16 10:50:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:18,856 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:18,857 INFO L225 Difference]: With dead ends: 237 [2020-10-16 10:50:18,857 INFO L226 Difference]: Without dead ends: 235 [2020-10-16 10:50:18,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-16 10:50:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-16 10:50:18,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-16 10:50:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 10:50:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-16 10:50:18,860 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-16 10:50:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:18,860 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-16 10:50:18,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:18,861 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-16 10:50:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:18,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:18,861 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:19,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 10:50:19,062 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:19,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:19,063 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-16 10:50:19,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:19,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126366413] [2020-10-16 10:50:19,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:19,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126366413] [2020-10-16 10:50:19,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180141704] [2020-10-16 10:50:19,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:19,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:19,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:19,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:19,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:19,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:19,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:19,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197657045] [2020-10-16 10:50:19,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:19,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:19,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:19,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:19,524 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-16 10:50:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:20,064 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-16 10:50:20,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:20,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:20,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:20,066 INFO L225 Difference]: With dead ends: 229 [2020-10-16 10:50:20,066 INFO L226 Difference]: Without dead ends: 227 [2020-10-16 10:50:20,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:50:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-16 10:50:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-16 10:50:20,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-16 10:50:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-16 10:50:20,070 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-16 10:50:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:20,070 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-16 10:50:20,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:20,073 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-16 10:50:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:20,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:20,074 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:20,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 10:50:20,283 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:20,283 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-16 10:50:20,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:20,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794568229] [2020-10-16 10:50:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:20,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794568229] [2020-10-16 10:50:20,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897351822] [2020-10-16 10:50:20,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:20,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:50:20,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:20,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:20,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:20,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:20,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:20,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953431756] [2020-10-16 10:50:20,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:20,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:20,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:20,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:20,635 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-16 10:50:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:21,127 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-16 10:50:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:50:21,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:21,128 INFO L225 Difference]: With dead ends: 225 [2020-10-16 10:50:21,128 INFO L226 Difference]: Without dead ends: 223 [2020-10-16 10:50:21,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:50:21,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-16 10:50:21,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-16 10:50:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 10:50:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-16 10:50:21,131 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-16 10:50:21,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:21,131 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-16 10:50:21,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:21,131 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-16 10:50:21,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:21,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:21,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:21,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 10:50:21,333 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:21,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:21,333 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-16 10:50:21,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:21,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361007494] [2020-10-16 10:50:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:21,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361007494] [2020-10-16 10:50:21,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221016360] [2020-10-16 10:50:21,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:21,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:50:21,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:21,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:21,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:21,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:21,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:21,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137933392] [2020-10-16 10:50:21,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:21,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:21,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:21,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:21,758 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-16 10:50:22,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:22,501 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-16 10:50:22,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:50:22,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:22,503 INFO L225 Difference]: With dead ends: 239 [2020-10-16 10:50:22,504 INFO L226 Difference]: Without dead ends: 237 [2020-10-16 10:50:22,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:50:22,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-16 10:50:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-16 10:50:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 10:50:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-16 10:50:22,508 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-16 10:50:22,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:22,509 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-16 10:50:22,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-16 10:50:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:22,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:22,509 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:22,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 10:50:22,718 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:22,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:22,719 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-16 10:50:22,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:22,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319688739] [2020-10-16 10:50:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:22,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319688739] [2020-10-16 10:50:22,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434457854] [2020-10-16 10:50:22,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:22,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:50:22,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:22,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:22,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:23,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:23,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:23,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000724607] [2020-10-16 10:50:23,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:23,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:23,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:23,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:23,074 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-16 10:50:23,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:23,505 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-16 10:50:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:50:23,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:23,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:23,506 INFO L225 Difference]: With dead ends: 234 [2020-10-16 10:50:23,506 INFO L226 Difference]: Without dead ends: 232 [2020-10-16 10:50:23,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:50:23,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-16 10:50:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-16 10:50:23,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 10:50:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-16 10:50:23,510 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-16 10:50:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:23,510 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-16 10:50:23,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-16 10:50:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:23,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:23,514 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:23,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-16 10:50:23,723 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:23,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:23,723 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-16 10:50:23,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:23,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392478163] [2020-10-16 10:50:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:23,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392478163] [2020-10-16 10:50:23,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703693460] [2020-10-16 10:50:23,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:23,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:50:23,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:23,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:23,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:24,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:24,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:24,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300146332] [2020-10-16 10:50:24,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:24,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:24,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:24,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:24,102 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-16 10:50:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:24,562 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-16 10:50:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:24,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:24,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:24,563 INFO L225 Difference]: With dead ends: 218 [2020-10-16 10:50:24,564 INFO L226 Difference]: Without dead ends: 216 [2020-10-16 10:50:24,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:50:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-16 10:50:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-16 10:50:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-16 10:50:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-16 10:50:24,567 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-16 10:50:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:24,567 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-16 10:50:24,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:24,567 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-16 10:50:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:24,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:24,568 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:24,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:24,769 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:24,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:24,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-16 10:50:24,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:24,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124685582] [2020-10-16 10:50:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:24,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124685582] [2020-10-16 10:50:24,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659386074] [2020-10-16 10:50:24,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:24,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:24,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:25,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:25,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:25,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136223461] [2020-10-16 10:50:25,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:25,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:25,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:25,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:25,219 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-16 10:50:25,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:25,353 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-16 10:50:25,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:50:25,354 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:25,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:25,355 INFO L225 Difference]: With dead ends: 208 [2020-10-16 10:50:25,355 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 10:50:25,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:50:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 10:50:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-16 10:50:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-16 10:50:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-16 10:50:25,358 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-16 10:50:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:25,358 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-16 10:50:25,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-16 10:50:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:25,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:25,358 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:25,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:25,559 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:25,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-16 10:50:25,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:25,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554742350] [2020-10-16 10:50:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:25,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554742350] [2020-10-16 10:50:25,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970932759] [2020-10-16 10:50:25,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:25,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:25,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:25,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:25,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:25,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:25,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:25,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689366571] [2020-10-16 10:50:25,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:25,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:25,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:25,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:25,954 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-16 10:50:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:26,280 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-16 10:50:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:50:26,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:26,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:26,281 INFO L225 Difference]: With dead ends: 229 [2020-10-16 10:50:26,281 INFO L226 Difference]: Without dead ends: 227 [2020-10-16 10:50:26,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:50:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-16 10:50:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-16 10:50:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 10:50:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-16 10:50:26,285 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-16 10:50:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:26,285 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-16 10:50:26,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-16 10:50:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:26,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:26,286 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:26,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:26,487 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:26,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:26,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-16 10:50:26,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:26,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172022351] [2020-10-16 10:50:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:26,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172022351] [2020-10-16 10:50:26,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949704168] [2020-10-16 10:50:26,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:26,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:50:26,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:26,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:26,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:26,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:26,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:26,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774423474] [2020-10-16 10:50:26,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:26,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:26,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:26,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:26,893 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-16 10:50:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:27,318 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-16 10:50:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:50:27,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:27,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:27,320 INFO L225 Difference]: With dead ends: 235 [2020-10-16 10:50:27,321 INFO L226 Difference]: Without dead ends: 233 [2020-10-16 10:50:27,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:50:27,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-16 10:50:27,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-16 10:50:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-16 10:50:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-16 10:50:27,324 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-16 10:50:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:27,324 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-16 10:50:27,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:27,324 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-16 10:50:27,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:27,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:27,325 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:27,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:27,526 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:27,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:27,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-16 10:50:27,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:27,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973766419] [2020-10-16 10:50:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:27,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973766419] [2020-10-16 10:50:27,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157681199] [2020-10-16 10:50:27,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:27,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:50:27,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:27,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:27,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:27,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:27,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:27,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603937792] [2020-10-16 10:50:27,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:27,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:27,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:27,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:27,936 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-16 10:50:28,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:28,461 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-16 10:50:28,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:28,462 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:28,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:28,463 INFO L225 Difference]: With dead ends: 233 [2020-10-16 10:50:28,463 INFO L226 Difference]: Without dead ends: 231 [2020-10-16 10:50:28,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:50:28,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-16 10:50:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-16 10:50:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 10:50:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-16 10:50:28,469 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-16 10:50:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:28,470 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-16 10:50:28,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-16 10:50:28,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:28,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:28,471 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:28,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:28,681 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:28,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:28,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-16 10:50:28,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:28,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41475580] [2020-10-16 10:50:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:28,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41475580] [2020-10-16 10:50:28,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159283604] [2020-10-16 10:50:28,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:28,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:28,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:28,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:28,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:33,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:33,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:33,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335875521] [2020-10-16 10:50:33,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:33,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:33,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:33,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:50:33,927 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-16 10:50:38,215 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 10:50:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:38,616 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-10-16 10:50:38,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:50:38,616 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:38,617 INFO L225 Difference]: With dead ends: 241 [2020-10-16 10:50:38,617 INFO L226 Difference]: Without dead ends: 239 [2020-10-16 10:50:38,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-16 10:50:38,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-16 10:50:38,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-16 10:50:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 10:50:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-10-16 10:50:38,620 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-10-16 10:50:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:38,620 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-10-16 10:50:38,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:38,620 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-10-16 10:50:38,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:38,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:38,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:38,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:38,822 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:38,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-16 10:50:38,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:38,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948879810] [2020-10-16 10:50:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:38,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948879810] [2020-10-16 10:50:38,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113732919] [2020-10-16 10:50:38,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:38,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:50:38,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:38,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:38,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:39,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:39,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:39,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336755483] [2020-10-16 10:50:39,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:39,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:39,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:39,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:39,273 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-10-16 10:50:39,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:39,934 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-10-16 10:50:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:50:39,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:39,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:39,936 INFO L225 Difference]: With dead ends: 233 [2020-10-16 10:50:39,936 INFO L226 Difference]: Without dead ends: 231 [2020-10-16 10:50:39,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:50:39,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-16 10:50:39,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-10-16 10:50:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-16 10:50:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-10-16 10:50:39,939 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-10-16 10:50:39,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:39,939 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-10-16 10:50:39,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:39,939 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-10-16 10:50:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:39,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:39,940 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:40,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-16 10:50:40,141 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:40,141 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-16 10:50:40,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:40,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674211617] [2020-10-16 10:50:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:40,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674211617] [2020-10-16 10:50:40,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561297849] [2020-10-16 10:50:40,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:40,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:40,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:40,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:40,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:40,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921507290] [2020-10-16 10:50:40,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:40,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:40,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:40,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:40,590 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-10-16 10:50:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:40,753 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-10-16 10:50:40,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:50:40,754 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:40,755 INFO L225 Difference]: With dead ends: 204 [2020-10-16 10:50:40,755 INFO L226 Difference]: Without dead ends: 202 [2020-10-16 10:50:40,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:50:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-16 10:50:40,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-16 10:50:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-16 10:50:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-10-16 10:50:40,758 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-10-16 10:50:40,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:40,759 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-10-16 10:50:40,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:40,759 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-10-16 10:50:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:40,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:40,759 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:40,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:40,960 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-16 10:50:40,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:40,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078942488] [2020-10-16 10:50:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:41,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078942488] [2020-10-16 10:50:41,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033035282] [2020-10-16 10:50:41,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:41,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:41,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:41,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:41,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:41,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:41,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:41,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957052812] [2020-10-16 10:50:41,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:41,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:41,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:41,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:41,356 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-10-16 10:50:41,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:41,738 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-10-16 10:50:41,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:41,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:41,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:41,739 INFO L225 Difference]: With dead ends: 225 [2020-10-16 10:50:41,740 INFO L226 Difference]: Without dead ends: 223 [2020-10-16 10:50:41,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:50:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-16 10:50:41,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-10-16 10:50:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-16 10:50:41,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-10-16 10:50:41,743 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-10-16 10:50:41,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:41,743 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-10-16 10:50:41,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:41,743 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-10-16 10:50:41,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:41,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:41,743 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:41,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-16 10:50:41,944 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:41,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:41,945 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-16 10:50:41,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:41,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217559146] [2020-10-16 10:50:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:42,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217559146] [2020-10-16 10:50:42,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282619062] [2020-10-16 10:50:42,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:42,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:50:42,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:42,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:42,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:42,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:42,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:42,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823270675] [2020-10-16 10:50:42,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:42,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:42,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:42,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:42,410 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-10-16 10:50:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:43,029 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-10-16 10:50:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:43,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:43,031 INFO L225 Difference]: With dead ends: 231 [2020-10-16 10:50:43,031 INFO L226 Difference]: Without dead ends: 229 [2020-10-16 10:50:43,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:50:43,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-16 10:50:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-16 10:50:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-16 10:50:43,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-10-16 10:50:43,037 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-10-16 10:50:43,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:43,037 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-10-16 10:50:43,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-10-16 10:50:43,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:43,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:43,038 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:43,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:43,248 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-16 10:50:43,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:43,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440910235] [2020-10-16 10:50:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:43,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440910235] [2020-10-16 10:50:43,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660689117] [2020-10-16 10:50:43,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:43,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:50:43,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:43,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:43,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:43,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:43,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:43,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862723230] [2020-10-16 10:50:43,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:43,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:43,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:43,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:43,656 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-10-16 10:50:43,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:43,869 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-10-16 10:50:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:50:43,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:43,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:43,870 INFO L225 Difference]: With dead ends: 200 [2020-10-16 10:50:43,870 INFO L226 Difference]: Without dead ends: 198 [2020-10-16 10:50:43,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:50:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-16 10:50:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-10-16 10:50:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 10:50:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-10-16 10:50:43,874 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-10-16 10:50:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:43,874 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-10-16 10:50:43,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-10-16 10:50:43,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:43,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:43,875 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:44,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:44,078 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:44,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:44,078 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-16 10:50:44,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:44,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032041717] [2020-10-16 10:50:44,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:44,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032041717] [2020-10-16 10:50:44,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742980497] [2020-10-16 10:50:44,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:44,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:50:44,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:44,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:44,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:44,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:44,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:44,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121475058] [2020-10-16 10:50:44,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:44,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:44,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:44,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:44,471 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-10-16 10:50:44,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:44,913 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-10-16 10:50:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:50:44,915 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:44,915 INFO L225 Difference]: With dead ends: 221 [2020-10-16 10:50:44,916 INFO L226 Difference]: Without dead ends: 219 [2020-10-16 10:50:44,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:50:44,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-16 10:50:44,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-10-16 10:50:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-16 10:50:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-10-16 10:50:44,919 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-10-16 10:50:44,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:44,920 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-10-16 10:50:44,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:44,920 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-10-16 10:50:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:44,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:44,920 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:45,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-16 10:50:45,129 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:45,129 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-16 10:50:45,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:45,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923743034] [2020-10-16 10:50:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:45,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923743034] [2020-10-16 10:50:45,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795731305] [2020-10-16 10:50:45,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:45,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:50:45,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:50:45,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:45,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:45,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:50:45,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511459814] [2020-10-16 10:50:45,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:50:45,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:45,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:50:45,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:50:45,334 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-10-16 10:50:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:45,549 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-10-16 10:50:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:50:45,550 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:50:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:45,550 INFO L225 Difference]: With dead ends: 201 [2020-10-16 10:50:45,551 INFO L226 Difference]: Without dead ends: 199 [2020-10-16 10:50:45,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:50:45,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-16 10:50:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-16 10:50:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-16 10:50:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-16 10:50:45,554 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-16 10:50:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:45,554 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-16 10:50:45,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:50:45,554 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-16 10:50:45,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:45,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:45,555 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:45,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:45,755 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:45,756 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-16 10:50:45,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:45,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829215331] [2020-10-16 10:50:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:45,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829215331] [2020-10-16 10:50:45,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176928120] [2020-10-16 10:50:45,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:45,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:45,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:46,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:50:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:46,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:46,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:46,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646412667] [2020-10-16 10:50:46,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:46,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:46,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:46,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:46,161 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-16 10:50:46,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:46,733 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-10-16 10:50:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:50:46,734 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:46,735 INFO L225 Difference]: With dead ends: 226 [2020-10-16 10:50:46,735 INFO L226 Difference]: Without dead ends: 221 [2020-10-16 10:50:46,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:50:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-16 10:50:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-10-16 10:50:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-16 10:50:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-16 10:50:46,739 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-16 10:50:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:46,740 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-16 10:50:46,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-16 10:50:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:46,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:46,740 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:46,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:46,941 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:46,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:46,942 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-16 10:50:46,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:46,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854861726] [2020-10-16 10:50:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:47,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854861726] [2020-10-16 10:50:47,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331252943] [2020-10-16 10:50:47,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:47,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:47,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:47,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:47,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:47,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:47,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:47,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898218764] [2020-10-16 10:50:47,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:47,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:47,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:47,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:47,366 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-16 10:50:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:47,852 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-16 10:50:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:50:47,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:47,853 INFO L225 Difference]: With dead ends: 218 [2020-10-16 10:50:47,853 INFO L226 Difference]: Without dead ends: 216 [2020-10-16 10:50:47,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:50:47,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-16 10:50:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-10-16 10:50:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-16 10:50:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-16 10:50:47,856 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-16 10:50:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:47,856 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-16 10:50:47,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-16 10:50:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:47,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:47,857 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:48,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:48,058 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-16 10:50:48,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:48,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973690975] [2020-10-16 10:50:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:48,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973690975] [2020-10-16 10:50:48,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703209327] [2020-10-16 10:50:48,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:48,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:50:48,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:48,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:48,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:48,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:50:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:48,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:48,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:48,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419730200] [2020-10-16 10:50:48,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:48,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:48,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:48,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:48,481 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-16 10:50:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:49,288 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-16 10:50:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:50:49,289 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:49,289 INFO L225 Difference]: With dead ends: 248 [2020-10-16 10:50:49,289 INFO L226 Difference]: Without dead ends: 243 [2020-10-16 10:50:49,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:50:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-16 10:50:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-16 10:50:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-16 10:50:49,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-16 10:50:49,293 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-16 10:50:49,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:49,294 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-16 10:50:49,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-16 10:50:49,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:49,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:49,294 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:49,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:49,495 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:49,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:49,495 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-16 10:50:49,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:49,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267714633] [2020-10-16 10:50:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:49,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267714633] [2020-10-16 10:50:49,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122461722] [2020-10-16 10:50:49,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:49,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:50:49,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:49,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:49,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:49,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:50:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:49,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:49,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:49,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032226007] [2020-10-16 10:50:49,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:49,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:49,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:49,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:49,895 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-16 10:50:50,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:50,502 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-10-16 10:50:50,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:50:50,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:50,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:50,504 INFO L225 Difference]: With dead ends: 238 [2020-10-16 10:50:50,504 INFO L226 Difference]: Without dead ends: 233 [2020-10-16 10:50:50,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:50:50,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-16 10:50:50,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-16 10:50:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-16 10:50:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-16 10:50:50,508 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-16 10:50:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:50,508 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-16 10:50:50,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-16 10:50:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:50,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:50,509 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:50,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:50,710 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:50,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:50,710 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-16 10:50:50,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:50,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976582189] [2020-10-16 10:50:50,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:50,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976582189] [2020-10-16 10:50:50,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069402173] [2020-10-16 10:50:50,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:50,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:50:50,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:50,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:50,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:51,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:51,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:51,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425008496] [2020-10-16 10:50:51,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:51,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:51,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:51,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:51,207 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-16 10:50:51,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:51,921 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-10-16 10:50:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:50:51,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:51,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:51,922 INFO L225 Difference]: With dead ends: 235 [2020-10-16 10:50:51,922 INFO L226 Difference]: Without dead ends: 233 [2020-10-16 10:50:51,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:50:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-16 10:50:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-10-16 10:50:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-16 10:50:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-16 10:50:51,926 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-16 10:50:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:51,927 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-16 10:50:51,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-16 10:50:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:51,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:51,928 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:52,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:52,138 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:52,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:52,138 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-16 10:50:52,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:52,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584491646] [2020-10-16 10:50:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:52,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584491646] [2020-10-16 10:50:52,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243936039] [2020-10-16 10:50:52,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:52,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:50:52,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:52,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:52,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:52,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:52,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:52,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925338623] [2020-10-16 10:50:52,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:52,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:52,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:52,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:52,622 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-16 10:50:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:53,376 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-10-16 10:50:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:50:53,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:53,377 INFO L225 Difference]: With dead ends: 252 [2020-10-16 10:50:53,377 INFO L226 Difference]: Without dead ends: 250 [2020-10-16 10:50:53,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:50:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-16 10:50:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-10-16 10:50:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-16 10:50:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-16 10:50:53,381 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-16 10:50:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:53,382 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-16 10:50:53,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-16 10:50:53,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:53,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:53,382 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:53,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-16 10:50:53,583 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:53,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:53,584 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-16 10:50:53,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:53,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842761631] [2020-10-16 10:50:53,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:53,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842761631] [2020-10-16 10:50:53,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545913281] [2020-10-16 10:50:53,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:53,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:53,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:54,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:50:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:54,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:54,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:54,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291112934] [2020-10-16 10:50:54,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:54,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:54,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:54,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:54,063 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-16 10:50:55,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:55,065 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-10-16 10:50:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:50:55,067 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:55,068 INFO L225 Difference]: With dead ends: 258 [2020-10-16 10:50:55,068 INFO L226 Difference]: Without dead ends: 253 [2020-10-16 10:50:55,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:50:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-16 10:50:55,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-16 10:50:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-16 10:50:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-16 10:50:55,072 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-16 10:50:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:55,072 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-16 10:50:55,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:55,072 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-16 10:50:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:55,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:55,072 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:55,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-16 10:50:55,282 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:55,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:55,282 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-16 10:50:55,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:55,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322702228] [2020-10-16 10:50:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:55,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322702228] [2020-10-16 10:50:55,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436687193] [2020-10-16 10:50:55,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:55,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:55,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:55,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:55,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:57,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:50:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:57,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:57,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:57,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716804774] [2020-10-16 10:50:57,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:57,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:57,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:57,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:50:57,816 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-16 10:51:02,149 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-16 10:51:06,455 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-16 10:51:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:07,201 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-10-16 10:51:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:51:07,203 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:51:07,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:07,204 INFO L225 Difference]: With dead ends: 287 [2020-10-16 10:51:07,204 INFO L226 Difference]: Without dead ends: 279 [2020-10-16 10:51:07,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-16 10:51:07,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-16 10:51:07,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-10-16 10:51:07,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-16 10:51:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-10-16 10:51:07,209 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-10-16 10:51:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:07,209 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-10-16 10:51:07,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:51:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-10-16 10:51:07,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:07,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:07,210 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:07,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-16 10:51:07,415 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:07,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:07,415 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-16 10:51:07,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:07,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979752919] [2020-10-16 10:51:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:07,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979752919] [2020-10-16 10:51:07,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341349369] [2020-10-16 10:51:07,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:07,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:51:07,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:07,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:07,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:07,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:07,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:51:07,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511108412] [2020-10-16 10:51:07,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:51:07,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:51:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:51:07,888 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-10-16 10:51:08,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:08,739 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-10-16 10:51:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:51:08,740 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:51:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:08,741 INFO L225 Difference]: With dead ends: 260 [2020-10-16 10:51:08,741 INFO L226 Difference]: Without dead ends: 255 [2020-10-16 10:51:08,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:51:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-16 10:51:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-10-16 10:51:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-16 10:51:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-10-16 10:51:08,745 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-10-16 10:51:08,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:08,746 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-10-16 10:51:08,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:51:08,746 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-10-16 10:51:08,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:08,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:08,746 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:08,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:08,951 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:08,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:08,951 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-16 10:51:08,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:08,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182691860] [2020-10-16 10:51:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:09,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182691860] [2020-10-16 10:51:09,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053652988] [2020-10-16 10:51:09,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:09,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:09,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:09,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:09,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:09,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:09,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:51:09,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414348863] [2020-10-16 10:51:09,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:51:09,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:09,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:51:09,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:51:09,324 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-10-16 10:51:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:09,797 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-10-16 10:51:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:51:09,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:51:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:09,799 INFO L225 Difference]: With dead ends: 235 [2020-10-16 10:51:09,799 INFO L226 Difference]: Without dead ends: 233 [2020-10-16 10:51:09,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:51:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-16 10:51:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-16 10:51:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 10:51:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-10-16 10:51:09,802 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-10-16 10:51:09,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:09,803 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-10-16 10:51:09,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:51:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-10-16 10:51:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:09,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:09,803 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:10,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:10,004 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:10,004 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-16 10:51:10,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:10,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597798218] [2020-10-16 10:51:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:10,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597798218] [2020-10-16 10:51:10,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897692541] [2020-10-16 10:51:10,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:10,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:10,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:10,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:10,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2020-10-16 10:51:14,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-16 10:51:14,744 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 10:51:14,748 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 10:51:14,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 10:51:14 BasicIcfg [2020-10-16 10:51:14,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 10:51:14,750 INFO L168 Benchmark]: Toolchain (without parser) took 273973.47 ms. Allocated memory was 140.0 MB in the beginning and 167.8 MB in the end (delta: 27.8 MB). Free memory was 101.4 MB in the beginning and 100.7 MB in the end (delta: 723.4 kB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:14,750 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-16 10:51:14,750 INFO L168 Benchmark]: CACSL2BoogieTranslator took 743.96 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.2 MB in the beginning and 160.7 MB in the end (delta: -59.5 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:14,751 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.18 ms. Allocated memory is still 203.4 MB. Free memory was 160.7 MB in the beginning and 158.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:14,751 INFO L168 Benchmark]: Boogie Preprocessor took 25.92 ms. Allocated memory is still 203.4 MB. Free memory was 158.7 MB in the beginning and 157.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:14,751 INFO L168 Benchmark]: RCFGBuilder took 501.10 ms. Allocated memory is still 203.4 MB. Free memory was 157.3 MB in the beginning and 137.0 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:14,751 INFO L168 Benchmark]: TraceAbstraction took 272643.50 ms. Allocated memory was 203.4 MB in the beginning and 167.8 MB in the end (delta: -35.7 MB). Free memory was 136.3 MB in the beginning and 100.7 MB in the end (delta: 35.7 MB). Peak memory consumption was 5.0 kB. Max. memory is 7.1 GB. [2020-10-16 10:51:14,753 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 743.96 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.2 MB in the beginning and 160.7 MB in the end (delta: -59.5 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 53.18 ms. Allocated memory is still 203.4 MB. Free memory was 160.7 MB in the beginning and 158.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.92 ms. Allocated memory is still 203.4 MB. Free memory was 158.7 MB in the beginning and 157.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 501.10 ms. Allocated memory is still 203.4 MB. Free memory was 157.3 MB in the beginning and 137.0 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 272643.50 ms. Allocated memory was 203.4 MB in the beginning and 167.8 MB in the end (delta: -35.7 MB). Free memory was 136.3 MB in the beginning and 100.7 MB in the end (delta: 35.7 MB). Peak memory consumption was 5.0 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 697 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.1s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 17 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 272.5s, OverallIterations: 195, TraceHistogramMax: 6, AutomataDifference: 150.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 2522 SDtfs, 18504 SDslu, 17454 SDs, 0 SdLazy, 12268 SolverSat, 4454 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 49.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4907 GetRequests, 918 SyntacticMatches, 171 SemanticMatches, 3818 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19646 ImplicationChecksByTransitivity, 155.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=167occurred in iteration=191, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 194 MinimizatonAttempts, 9211 StatesRemovedByMinimization, 194 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 66.2s InterpolantComputationTime, 4782 NumberOfCodeBlocks, 4782 NumberOfCodeBlocksAsserted, 593 NumberOfCheckSat, 4402 ConstructedInterpolants, 11 QuantifiedInterpolants, 464475 SizeOfPredicates, 186 NumberOfNonLiveVariables, 16214 ConjunctsInSsa, 1830 ConjunctsInUnsatCore, 380 InterpolantComputations, 8 PerfectInterpolantSequences, 0/1928 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown