/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 11:41:09,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 11:41:09,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 11:41:09,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 11:41:09,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 11:41:09,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 11:41:09,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 11:41:09,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 11:41:09,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 11:41:09,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 11:41:09,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 11:41:09,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 11:41:09,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 11:41:09,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 11:41:09,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 11:41:09,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 11:41:09,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 11:41:09,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 11:41:09,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 11:41:09,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 11:41:09,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 11:41:09,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 11:41:09,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 11:41:09,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 11:41:09,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-18 11:41:09,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 11:41:09,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 11:41:09,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 11:41:09,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 11:41:09,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 11:41:09,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 11:41:09,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 11:41:09,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 11:41:09,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 11:41:09,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 11:41:09,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 11:41:09,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-18 11:41:09,512 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 11:41:09,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 11:41:09,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 11:41:09,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 11:41:09,514 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 11:41:09,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 11:41:09,515 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 11:41:09,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 11:41:09,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 11:41:09,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 11:41:09,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 11:41:09,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 11:41:09,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 11:41:09,517 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 11:41:09,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 11:41:09,518 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 11:41:09,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 11:41:09,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 11:41:09,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 11:41:09,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 11:41:09,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 11:41:09,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 11:41:09,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 11:41:09,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 11:41:09,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 11:41:09,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 11:41:09,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 11:41:09,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 11:41:09,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-18 11:41:09,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 11:41:09,824 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 11:41:09,839 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 11:41:09,842 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 11:41:09,844 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 11:41:09,844 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 11:41:09,845 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2019-12-18 11:41:09,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd611eefe/6c57edd90547489b87bd14a0f5116f8f/FLAG1f533b199 [2019-12-18 11:41:10,489 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 11:41:10,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2019-12-18 11:41:10,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd611eefe/6c57edd90547489b87bd14a0f5116f8f/FLAG1f533b199 [2019-12-18 11:41:10,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd611eefe/6c57edd90547489b87bd14a0f5116f8f [2019-12-18 11:41:10,769 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 11:41:10,771 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 11:41:10,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 11:41:10,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 11:41:10,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 11:41:10,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:41:10" (1/1) ... [2019-12-18 11:41:10,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f25b16b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:10, skipping insertion in model container [2019-12-18 11:41:10,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:41:10" (1/1) ... [2019-12-18 11:41:10,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 11:41:10,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 11:41:11,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:41:11,283 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 11:41:11,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:41:11,459 INFO L208 MainTranslator]: Completed translation [2019-12-18 11:41:11,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11 WrapperNode [2019-12-18 11:41:11,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 11:41:11,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 11:41:11,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 11:41:11,461 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 11:41:11,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 11:41:11,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 11:41:11,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 11:41:11,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 11:41:11,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 11:41:11,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 11:41:11,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 11:41:11,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 11:41:11,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 11:41:11,639 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 11:41:11,639 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 11:41:11,639 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 11:41:11,640 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 11:41:11,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 11:41:11,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 11:41:11,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 11:41:11,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 11:41:11,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 11:41:11,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 11:41:11,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 11:41:11,644 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 11:41:12,044 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 11:41:12,045 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 11:41:12,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:41:12 BoogieIcfgContainer [2019-12-18 11:41:12,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 11:41:12,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 11:41:12,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 11:41:12,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 11:41:12,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:41:10" (1/3) ... [2019-12-18 11:41:12,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2da259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:41:12, skipping insertion in model container [2019-12-18 11:41:12,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (2/3) ... [2019-12-18 11:41:12,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2da259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:41:12, skipping insertion in model container [2019-12-18 11:41:12,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:41:12" (3/3) ... [2019-12-18 11:41:12,064 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2019-12-18 11:41:12,072 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 11:41:12,072 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 11:41:12,079 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 11:41:12,080 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 11:41:12,113 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,113 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,113 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,114 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,114 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,115 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,115 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,115 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,115 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,116 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,116 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,117 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,117 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,117 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,118 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,118 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,118 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,119 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,119 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,119 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,119 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,120 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,120 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,120 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,121 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,121 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,121 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,121 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,122 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,122 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,126 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,126 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,126 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,127 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,127 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,127 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,133 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,133 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,134 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,134 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,134 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,134 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,149 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 11:41:12,169 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 11:41:12,170 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 11:41:12,170 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 11:41:12,170 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 11:41:12,170 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 11:41:12,170 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 11:41:12,171 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 11:41:12,171 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 11:41:12,184 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-18 11:41:12,186 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 11:41:12,226 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 11:41:12,227 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:41:12,235 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 11:41:12,238 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 11:41:12,253 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 11:41:12,253 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:41:12,255 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 11:41:12,257 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-18 11:41:12,258 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-18 11:41:12,560 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 13 [2019-12-18 11:41:13,666 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-18 11:41:13,787 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-18 11:41:13,787 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-18 11:41:13,791 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-18 11:41:13,808 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 11:41:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 11:41:13,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-18 11:41:13,816 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:13,817 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-18 11:41:13,818 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:13,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:13,824 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-18 11:41:13,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:13,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609916033] [2019-12-18 11:41:13,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609916033] [2019-12-18 11:41:14,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:14,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-18 11:41:14,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917175494] [2019-12-18 11:41:14,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 11:41:14,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 11:41:14,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:41:14,104 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 11:41:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,155 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-18 11:41:14,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:41:14,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-18 11:41:14,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,172 INFO L225 Difference]: With dead ends: 54 [2019-12-18 11:41:14,173 INFO L226 Difference]: Without dead ends: 36 [2019-12-18 11:41:14,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:41:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-18 11:41:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-18 11:41:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 11:41:14,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-18 11:41:14,226 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-18 11:41:14,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,226 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-18 11:41:14,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 11:41:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-18 11:41:14,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 11:41:14,228 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,228 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,228 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,229 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-18 11:41:14,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54045127] [2019-12-18 11:41:14,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54045127] [2019-12-18 11:41:14,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:14,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:41:14,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402661643] [2019-12-18 11:41:14,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 11:41:14,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 11:41:14,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,369 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-18 11:41:14,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,397 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-18 11:41:14,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 11:41:14,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 11:41:14,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,401 INFO L225 Difference]: With dead ends: 42 [2019-12-18 11:41:14,401 INFO L226 Difference]: Without dead ends: 41 [2019-12-18 11:41:14,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-18 11:41:14,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-18 11:41:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-18 11:41:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-18 11:41:14,418 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-18 11:41:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,418 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-18 11:41:14,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 11:41:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-18 11:41:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 11:41:14,419 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,420 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,420 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,420 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-18 11:41:14,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478692248] [2019-12-18 11:41:14,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478692248] [2019-12-18 11:41:14,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:14,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:41:14,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092053982] [2019-12-18 11:41:14,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 11:41:14,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 11:41:14,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,523 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-18 11:41:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,545 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-18 11:41:14,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 11:41:14,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 11:41:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,549 INFO L225 Difference]: With dead ends: 51 [2019-12-18 11:41:14,549 INFO L226 Difference]: Without dead ends: 50 [2019-12-18 11:41:14,549 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-18 11:41:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-18 11:41:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-18 11:41:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-18 11:41:14,564 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-18 11:41:14,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,564 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-18 11:41:14,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 11:41:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-18 11:41:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 11:41:14,565 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,565 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,568 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-18 11:41:14,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372155252] [2019-12-18 11:41:14,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372155252] [2019-12-18 11:41:14,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673873991] [2019-12-18 11:41:14,668 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:14,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:14,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:14,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:41:14,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:14,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 11:41:14,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56978854] [2019-12-18 11:41:14,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:41:14,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:41:14,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:14,804 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-18 11:41:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,829 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-18 11:41:14,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:14,830 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 11:41:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,831 INFO L225 Difference]: With dead ends: 56 [2019-12-18 11:41:14,831 INFO L226 Difference]: Without dead ends: 55 [2019-12-18 11:41:14,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:14,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-18 11:41:14,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-18 11:41:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-18 11:41:14,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-18 11:41:14,839 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-18 11:41:14,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,839 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-18 11:41:14,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:41:14,839 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-18 11:41:14,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 11:41:14,840 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,840 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,044 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-18 11:41:15,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,045 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513230780] [2019-12-18 11:41:15,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513230780] [2019-12-18 11:41:15,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85337414] [2019-12-18 11:41:15,114 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:15,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:15,192 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:41:15,193 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:15,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 11:41:15,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120907666] [2019-12-18 11:41:15,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:41:15,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:41:15,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:15,249 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-18 11:41:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:15,315 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-18 11:41:15,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:15,317 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 11:41:15,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:15,318 INFO L225 Difference]: With dead ends: 63 [2019-12-18 11:41:15,318 INFO L226 Difference]: Without dead ends: 62 [2019-12-18 11:41:15,318 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:15,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-18 11:41:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-18 11:41:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-18 11:41:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-18 11:41:15,329 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-18 11:41:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:15,331 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-18 11:41:15,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:41:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-18 11:41:15,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:15,332 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:15,333 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,536 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,537 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-18 11:41:15,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253255710] [2019-12-18 11:41:15,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253255710] [2019-12-18 11:41:15,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242597318] [2019-12-18 11:41:15,622 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:15,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:15,676 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:15,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:15,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:15,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284766420] [2019-12-18 11:41:15,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:15,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:15,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:15,787 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-18 11:41:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:15,816 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-18 11:41:15,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:15,816 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 11:41:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:15,817 INFO L225 Difference]: With dead ends: 66 [2019-12-18 11:41:15,817 INFO L226 Difference]: Without dead ends: 65 [2019-12-18 11:41:15,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:15,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-18 11:41:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-18 11:41:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-18 11:41:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-18 11:41:15,824 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-18 11:41:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:15,825 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-18 11:41:15,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-18 11:41:15,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:15,826 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:15,826 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,040 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,040 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-18 11:41:16,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011758100] [2019-12-18 11:41:16,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011758100] [2019-12-18 11:41:16,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:16,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:41:16,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285760076] [2019-12-18 11:41:16,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:41:16,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:41:16,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:41:16,125 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-18 11:41:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,148 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-18 11:41:16,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:16,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:41:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,152 INFO L225 Difference]: With dead ends: 68 [2019-12-18 11:41:16,152 INFO L226 Difference]: Without dead ends: 67 [2019-12-18 11:41:16,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:41:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-18 11:41:16,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-18 11:41:16,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-18 11:41:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-18 11:41:16,168 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-18 11:41:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,169 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-18 11:41:16,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:41:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-18 11:41:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:16,170 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,170 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,171 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,171 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-18 11:41:16,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206994726] [2019-12-18 11:41:16,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206994726] [2019-12-18 11:41:16,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:16,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:41:16,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197253254] [2019-12-18 11:41:16,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:41:16,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:41:16,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:41:16,246 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-18 11:41:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,275 INFO L93 Difference]: Finished difference Result 69 states and 145 transitions. [2019-12-18 11:41:16,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:16,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:41:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,277 INFO L225 Difference]: With dead ends: 69 [2019-12-18 11:41:16,277 INFO L226 Difference]: Without dead ends: 68 [2019-12-18 11:41:16,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-12-18 11:41:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-18 11:41:16,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-18 11:41:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-18 11:41:16,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-18 11:41:16,284 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-18 11:41:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,285 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-18 11:41:16,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:41:16,285 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-18 11:41:16,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:16,286 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,286 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,286 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,287 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-18 11:41:16,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554455407] [2019-12-18 11:41:16,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554455407] [2019-12-18 11:41:16,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441007904] [2019-12-18 11:41:16,337 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:16,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:16,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:16,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:16,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:16,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647285064] [2019-12-18 11:41:16,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:16,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:16,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:16,452 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-18 11:41:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,549 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-18 11:41:16,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:16,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 11:41:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,550 INFO L225 Difference]: With dead ends: 77 [2019-12-18 11:41:16,551 INFO L226 Difference]: Without dead ends: 76 [2019-12-18 11:41:16,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-18 11:41:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-18 11:41:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-18 11:41:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-18 11:41:16,557 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-18 11:41:16,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,558 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-18 11:41:16,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:16,558 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-18 11:41:16,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:16,559 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,559 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,760 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,761 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-18 11:41:16,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817691934] [2019-12-18 11:41:16,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817691934] [2019-12-18 11:41:16,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801999490] [2019-12-18 11:41:16,837 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,878 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:16,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:16,879 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:16,881 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:16,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:16,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693389325] [2019-12-18 11:41:16,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:16,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:16,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:16,956 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-18 11:41:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,983 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-18 11:41:16,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:16,984 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 11:41:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,985 INFO L225 Difference]: With dead ends: 80 [2019-12-18 11:41:16,985 INFO L226 Difference]: Without dead ends: 79 [2019-12-18 11:41:16,985 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:16,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-18 11:41:16,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-18 11:41:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 11:41:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 11:41:16,991 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 11:41:16,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,992 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 11:41:16,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 11:41:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:16,993 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,993 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:17,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,205 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:17,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:17,205 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-18 11:41:17,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:17,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454401686] [2019-12-18 11:41:17,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454401686] [2019-12-18 11:41:17,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916763023] [2019-12-18 11:41:17,276 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:17,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:17,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:17,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:17,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:17,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274999535] [2019-12-18 11:41:17,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:17,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:17,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:17,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:17,392 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 11:41:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:17,456 INFO L93 Difference]: Finished difference Result 81 states and 174 transitions. [2019-12-18 11:41:17,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:17,457 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:17,458 INFO L225 Difference]: With dead ends: 81 [2019-12-18 11:41:17,458 INFO L226 Difference]: Without dead ends: 80 [2019-12-18 11:41:17,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-18 11:41:17,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2019-12-18 11:41:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 11:41:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 11:41:17,463 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 11:41:17,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:17,464 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 11:41:17,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 11:41:17,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:17,465 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:17,465 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:17,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,669 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:17,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:17,670 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-18 11:41:17,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:17,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109729488] [2019-12-18 11:41:17,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109729488] [2019-12-18 11:41:17,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582677348] [2019-12-18 11:41:17,726 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,776 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:17,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:17,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:17,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:17,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:17,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192094108] [2019-12-18 11:41:17,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:17,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:17,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:17,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:17,834 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 11:41:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:17,920 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-18 11:41:17,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:17,920 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:17,921 INFO L225 Difference]: With dead ends: 85 [2019-12-18 11:41:17,921 INFO L226 Difference]: Without dead ends: 84 [2019-12-18 11:41:17,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-18 11:41:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-18 11:41:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 11:41:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 11:41:17,927 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 11:41:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:17,927 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 11:41:17,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 11:41:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:17,928 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:17,928 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:18,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,132 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:18,133 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-18 11:41:18,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:18,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996271386] [2019-12-18 11:41:18,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996271386] [2019-12-18 11:41:18,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215365081] [2019-12-18 11:41:18,194 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,268 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:18,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:18,269 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:18,270 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:18,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:18,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847818509] [2019-12-18 11:41:18,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:18,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:18,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:18,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:18,328 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 11:41:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:18,433 INFO L93 Difference]: Finished difference Result 86 states and 182 transitions. [2019-12-18 11:41:18,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:18,433 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:18,434 INFO L225 Difference]: With dead ends: 86 [2019-12-18 11:41:18,434 INFO L226 Difference]: Without dead ends: 85 [2019-12-18 11:41:18,435 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:18,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-18 11:41:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-18 11:41:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 11:41:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-18 11:41:18,439 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-18 11:41:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:18,439 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-18 11:41:18,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-18 11:41:18,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:18,441 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:18,441 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:18,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,645 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash 507891352, now seen corresponding path program 6 times [2019-12-18 11:41:18,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:18,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352684953] [2019-12-18 11:41:18,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352684953] [2019-12-18 11:41:18,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955481447] [2019-12-18 11:41:18,704 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,762 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:18,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:18,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:18,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:18,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:18,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843119157] [2019-12-18 11:41:18,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:18,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:18,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:18,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:18,837 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-18 11:41:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:18,945 INFO L93 Difference]: Finished difference Result 87 states and 183 transitions. [2019-12-18 11:41:18,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:18,947 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:18,948 INFO L225 Difference]: With dead ends: 87 [2019-12-18 11:41:18,948 INFO L226 Difference]: Without dead ends: 86 [2019-12-18 11:41:18,949 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-18 11:41:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2019-12-18 11:41:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 11:41:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 11:41:18,953 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 11:41:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:18,953 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 11:41:18,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 11:41:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:18,954 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:18,954 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:19,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,162 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:19,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:19,162 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 7 times [2019-12-18 11:41:19,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:19,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57930090] [2019-12-18 11:41:19,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57930090] [2019-12-18 11:41:19,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409320916] [2019-12-18 11:41:19,225 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:19,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:19,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:19,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892311988] [2019-12-18 11:41:19,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:19,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:19,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:19,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:19,321 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 11:41:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:19,438 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-18 11:41:19,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:19,438 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:19,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:19,439 INFO L225 Difference]: With dead ends: 88 [2019-12-18 11:41:19,439 INFO L226 Difference]: Without dead ends: 87 [2019-12-18 11:41:19,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2019-12-18 11:41:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-18 11:41:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2019-12-18 11:41:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 11:41:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-18 11:41:19,443 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-18 11:41:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:19,444 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-18 11:41:19,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-18 11:41:19,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:19,446 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:19,446 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:19,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,653 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:19,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:19,654 INFO L82 PathProgramCache]: Analyzing trace with hash 507886547, now seen corresponding path program 8 times [2019-12-18 11:41:19,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:19,654 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105533688] [2019-12-18 11:41:19,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105533688] [2019-12-18 11:41:19,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372742641] [2019-12-18 11:41:19,701 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,746 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:19,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:19,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:19,748 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:19,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:19,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129009759] [2019-12-18 11:41:19,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:19,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:19,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:19,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:19,796 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-18 11:41:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:19,894 INFO L93 Difference]: Finished difference Result 87 states and 180 transitions. [2019-12-18 11:41:19,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:19,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:19,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:19,895 INFO L225 Difference]: With dead ends: 87 [2019-12-18 11:41:19,895 INFO L226 Difference]: Without dead ends: 86 [2019-12-18 11:41:19,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2019-12-18 11:41:19,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-18 11:41:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2019-12-18 11:41:19,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-18 11:41:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-18 11:41:19,898 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-18 11:41:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:19,899 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-18 11:41:19,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:19,899 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-18 11:41:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:19,900 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:19,900 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:20,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,103 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:20,103 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-18 11:41:20,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:20,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262351197] [2019-12-18 11:41:20,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262351197] [2019-12-18 11:41:20,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521143750] [2019-12-18 11:41:20,204 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,263 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:20,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:20,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:20,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:20,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:20,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26796543] [2019-12-18 11:41:20,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:20,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:20,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:20,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:20,324 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-18 11:41:20,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:20,417 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-18 11:41:20,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:20,419 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 11:41:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:20,420 INFO L225 Difference]: With dead ends: 92 [2019-12-18 11:41:20,420 INFO L226 Difference]: Without dead ends: 91 [2019-12-18 11:41:20,420 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-18 11:41:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-18 11:41:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-18 11:41:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-18 11:41:20,424 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-18 11:41:20,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:20,425 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-18 11:41:20,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-18 11:41:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:20,425 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:20,426 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:20,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,629 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:20,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-18 11:41:20,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:20,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030788507] [2019-12-18 11:41:20,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030788507] [2019-12-18 11:41:20,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746660982] [2019-12-18 11:41:20,714 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,758 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:20,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:20,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:20,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:20,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:20,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970334539] [2019-12-18 11:41:20,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:20,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:20,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:20,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:20,850 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-18 11:41:20,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:20,885 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-18 11:41:20,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:20,886 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 11:41:20,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:20,887 INFO L225 Difference]: With dead ends: 95 [2019-12-18 11:41:20,887 INFO L226 Difference]: Without dead ends: 94 [2019-12-18 11:41:20,888 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:20,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-18 11:41:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-18 11:41:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:20,892 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:20,892 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:20,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:20,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:20,893 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:20,893 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:21,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,102 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:21,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:21,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 9 times [2019-12-18 11:41:21,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:21,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920552300] [2019-12-18 11:41:21,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920552300] [2019-12-18 11:41:21,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648915663] [2019-12-18 11:41:21,165 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:21,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:21,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:21,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:21,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:21,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497723357] [2019-12-18 11:41:21,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:21,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:21,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:21,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:21,301 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:21,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:21,403 INFO L93 Difference]: Finished difference Result 98 states and 211 transitions. [2019-12-18 11:41:21,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:21,404 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:21,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:21,404 INFO L225 Difference]: With dead ends: 98 [2019-12-18 11:41:21,405 INFO L226 Difference]: Without dead ends: 97 [2019-12-18 11:41:21,405 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:21,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-18 11:41:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2019-12-18 11:41:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:21,411 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:21,411 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:21,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:21,412 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:21,412 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:21,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,616 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:21,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 10 times [2019-12-18 11:41:21,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:21,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095744836] [2019-12-18 11:41:21,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095744836] [2019-12-18 11:41:21,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579288431] [2019-12-18 11:41:21,676 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,719 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:21,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:21,720 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:21,721 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:21,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:21,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837295286] [2019-12-18 11:41:21,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:21,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:21,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:21,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:21,794 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:21,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:21,884 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-18 11:41:21,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:21,885 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:21,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:21,886 INFO L225 Difference]: With dead ends: 101 [2019-12-18 11:41:21,886 INFO L226 Difference]: Without dead ends: 100 [2019-12-18 11:41:21,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:21,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-18 11:41:21,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-18 11:41:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:21,890 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:21,890 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:21,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:21,891 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:21,891 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:22,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,092 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:22,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 11 times [2019-12-18 11:41:22,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:22,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223805484] [2019-12-18 11:41:22,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223805484] [2019-12-18 11:41:22,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386858350] [2019-12-18 11:41:22,161 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,203 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:22,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:22,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:22,205 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:22,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:22,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788479273] [2019-12-18 11:41:22,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:22,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:22,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:22,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:22,343 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:22,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:22,510 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2019-12-18 11:41:22,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:22,511 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:22,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:22,512 INFO L225 Difference]: With dead ends: 105 [2019-12-18 11:41:22,512 INFO L226 Difference]: Without dead ends: 104 [2019-12-18 11:41:22,512 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:41:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-18 11:41:22,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2019-12-18 11:41:22,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:22,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:22,514 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:22,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:22,515 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:22,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:22,520 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:22,520 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:22,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,724 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:22,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:22,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555059, now seen corresponding path program 12 times [2019-12-18 11:41:22,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:22,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447504662] [2019-12-18 11:41:22,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447504662] [2019-12-18 11:41:22,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35509519] [2019-12-18 11:41:22,793 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,851 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:22,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:22,853 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:22,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:22,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:22,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508237060] [2019-12-18 11:41:22,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:22,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:22,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:22,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:22,932 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:23,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:23,052 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2019-12-18 11:41:23,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:23,053 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:23,054 INFO L225 Difference]: With dead ends: 103 [2019-12-18 11:41:23,054 INFO L226 Difference]: Without dead ends: 102 [2019-12-18 11:41:23,055 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:23,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-18 11:41:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2019-12-18 11:41:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 11:41:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 11:41:23,060 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 11:41:23,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:23,060 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 11:41:23,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:23,061 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 11:41:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:23,061 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:23,061 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:23,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,265 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:23,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 13 times [2019-12-18 11:41:23,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:23,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461551253] [2019-12-18 11:41:23,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:23,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461551253] [2019-12-18 11:41:23,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331600235] [2019-12-18 11:41:23,376 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:23,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:23,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:23,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:23,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:23,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155779258] [2019-12-18 11:41:23,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:23,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:23,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:23,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:23,509 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 11:41:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:23,647 INFO L93 Difference]: Finished difference Result 110 states and 232 transitions. [2019-12-18 11:41:23,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:23,648 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:23,649 INFO L225 Difference]: With dead ends: 110 [2019-12-18 11:41:23,649 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 11:41:23,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:41:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 11:41:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2019-12-18 11:41:23,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:23,653 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:23,653 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:23,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:23,655 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:23,655 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:23,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,859 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:23,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:23,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 14 times [2019-12-18 11:41:23,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:23,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603847613] [2019-12-18 11:41:23,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:23,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603847613] [2019-12-18 11:41:23,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941266741] [2019-12-18 11:41:23,918 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,967 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:23,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:23,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:23,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:24,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:24,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089267771] [2019-12-18 11:41:24,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:24,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:24,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:24,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:24,037 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:24,188 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-18 11:41:24,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:24,189 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:24,191 INFO L225 Difference]: With dead ends: 112 [2019-12-18 11:41:24,191 INFO L226 Difference]: Without dead ends: 111 [2019-12-18 11:41:24,191 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:24,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-18 11:41:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2019-12-18 11:41:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:24,196 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:24,197 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:24,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:24,197 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:24,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:24,197 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:24,197 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:24,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,401 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:24,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:24,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 15 times [2019-12-18 11:41:24,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:24,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376088449] [2019-12-18 11:41:24,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376088449] [2019-12-18 11:41:24,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868462643] [2019-12-18 11:41:24,455 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:24,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:24,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:24,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:24,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:24,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313258699] [2019-12-18 11:41:24,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:24,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:24,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:24,573 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:24,703 INFO L93 Difference]: Finished difference Result 106 states and 225 transitions. [2019-12-18 11:41:24,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:24,703 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:24,704 INFO L225 Difference]: With dead ends: 106 [2019-12-18 11:41:24,704 INFO L226 Difference]: Without dead ends: 105 [2019-12-18 11:41:24,705 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:24,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-18 11:41:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2019-12-18 11:41:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:24,708 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:24,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:24,709 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:24,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:24,709 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:24,710 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:24,710 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:24,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,914 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:24,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:24,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1435231979, now seen corresponding path program 16 times [2019-12-18 11:41:24,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:24,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71914331] [2019-12-18 11:41:24,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71914331] [2019-12-18 11:41:25,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148848901] [2019-12-18 11:41:25,002 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,043 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:25,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:25,044 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:25,045 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:25,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:25,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904629460] [2019-12-18 11:41:25,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:25,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:25,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:25,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:25,121 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:25,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:25,378 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-18 11:41:25,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:25,378 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:25,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:25,379 INFO L225 Difference]: With dead ends: 112 [2019-12-18 11:41:25,379 INFO L226 Difference]: Without dead ends: 111 [2019-12-18 11:41:25,380 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:25,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-18 11:41:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2019-12-18 11:41:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 11:41:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 11:41:25,383 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 11:41:25,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:25,383 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 11:41:25,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:25,384 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 11:41:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:25,384 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:25,384 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:25,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,585 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:25,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:25,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236629, now seen corresponding path program 17 times [2019-12-18 11:41:25,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:25,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50763580] [2019-12-18 11:41:25,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50763580] [2019-12-18 11:41:25,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996264190] [2019-12-18 11:41:25,655 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,700 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:25,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:25,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:25,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:25,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:25,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144277073] [2019-12-18 11:41:25,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:25,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:25,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:25,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:25,771 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 11:41:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:25,982 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-18 11:41:25,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:25,987 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:25,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:25,988 INFO L225 Difference]: With dead ends: 115 [2019-12-18 11:41:25,988 INFO L226 Difference]: Without dead ends: 114 [2019-12-18 11:41:25,988 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-18 11:41:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2019-12-18 11:41:25,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:25,992 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:25,993 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:25,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:25,994 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:25,994 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:26,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,198 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:26,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:26,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236784, now seen corresponding path program 18 times [2019-12-18 11:41:26,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:26,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261233157] [2019-12-18 11:41:26,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:26,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261233157] [2019-12-18 11:41:26,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279245293] [2019-12-18 11:41:26,258 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,308 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:26,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:26,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:26,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:26,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:26,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:26,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471334097] [2019-12-18 11:41:26,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:26,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:26,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:26,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:26,444 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:26,723 INFO L93 Difference]: Finished difference Result 111 states and 231 transitions. [2019-12-18 11:41:26,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:26,723 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:26,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:26,724 INFO L225 Difference]: With dead ends: 111 [2019-12-18 11:41:26,724 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 11:41:26,725 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:26,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 11:41:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2019-12-18 11:41:26,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 11:41:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 11:41:26,728 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 11:41:26,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:26,729 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 11:41:26,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:26,729 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 11:41:26,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:26,730 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:26,730 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:26,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,933 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:26,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380779, now seen corresponding path program 19 times [2019-12-18 11:41:26,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:26,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332343172] [2019-12-18 11:41:26,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:26,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332343172] [2019-12-18 11:41:26,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66772964] [2019-12-18 11:41:26,990 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:27,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:27,035 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:27,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:27,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:27,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164981829] [2019-12-18 11:41:27,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:27,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:27,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:27,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:27,098 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:27,296 INFO L93 Difference]: Finished difference Result 109 states and 228 transitions. [2019-12-18 11:41:27,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:27,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:27,297 INFO L225 Difference]: With dead ends: 109 [2019-12-18 11:41:27,297 INFO L226 Difference]: Without dead ends: 108 [2019-12-18 11:41:27,298 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-18 11:41:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2019-12-18 11:41:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-18 11:41:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-18 11:41:27,304 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-18 11:41:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:27,304 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-18 11:41:27,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:27,305 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-18 11:41:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:27,305 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:27,305 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:27,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:27,508 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:27,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:27,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 20 times [2019-12-18 11:41:27,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:27,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248897933] [2019-12-18 11:41:27,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:27,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248897933] [2019-12-18 11:41:27,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032253782] [2019-12-18 11:41:27,572 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:27,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:27,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:27,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:27,626 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:27,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:27,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:27,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301546199] [2019-12-18 11:41:27,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:27,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:27,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:27,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:27,695 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-18 11:41:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:27,977 INFO L93 Difference]: Finished difference Result 116 states and 244 transitions. [2019-12-18 11:41:27,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:27,977 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:27,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:27,978 INFO L225 Difference]: With dead ends: 116 [2019-12-18 11:41:27,978 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 11:41:27,979 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 11:41:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2019-12-18 11:41:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-18 11:41:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 190 transitions. [2019-12-18 11:41:27,983 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 190 transitions. Word has length 11 [2019-12-18 11:41:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:27,983 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 190 transitions. [2019-12-18 11:41:27,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 190 transitions. [2019-12-18 11:41:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:27,984 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:27,984 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:28,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:28,187 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:28,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:28,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385584, now seen corresponding path program 21 times [2019-12-18 11:41:28,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:28,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684086034] [2019-12-18 11:41:28,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:28,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684086034] [2019-12-18 11:41:28,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111379286] [2019-12-18 11:41:28,260 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:28,316 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:28,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:28,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 11:41:28,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:28,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:28,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:28,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512844633] [2019-12-18 11:41:28,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:28,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:28,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:28,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:28,367 INFO L87 Difference]: Start difference. First operand 87 states and 190 transitions. Second operand 12 states. [2019-12-18 11:41:28,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:28,504 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-18 11:41:28,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:28,504 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:28,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:28,506 INFO L225 Difference]: With dead ends: 115 [2019-12-18 11:41:28,506 INFO L226 Difference]: Without dead ends: 114 [2019-12-18 11:41:28,506 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:28,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-18 11:41:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2019-12-18 11:41:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 11:41:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 11:41:28,511 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 11:41:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:28,511 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 11:41:28,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 11:41:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:28,512 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:28,512 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:28,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:28,715 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:28,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:28,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-18 11:41:28,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:28,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834226751] [2019-12-18 11:41:28,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:28,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834226751] [2019-12-18 11:41:28,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666045305] [2019-12-18 11:41:28,775 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:28,829 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:28,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:28,830 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:28,831 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:28,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:28,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:28,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059015284] [2019-12-18 11:41:28,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:28,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:28,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:28,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:28,910 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-18 11:41:29,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:29,037 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-18 11:41:29,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:29,038 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 11:41:29,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:29,040 INFO L225 Difference]: With dead ends: 107 [2019-12-18 11:41:29,040 INFO L226 Difference]: Without dead ends: 106 [2019-12-18 11:41:29,040 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-18 11:41:29,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-18 11:41:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-18 11:41:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-18 11:41:29,044 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-18 11:41:29,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:29,044 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-18 11:41:29,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:29,044 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-18 11:41:29,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:29,045 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:29,045 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:29,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:29,246 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:29,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:29,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-18 11:41:29,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:29,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711975416] [2019-12-18 11:41:29,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:29,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711975416] [2019-12-18 11:41:29,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940080419] [2019-12-18 11:41:29,325 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:29,368 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:41:29,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:29,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:41:29,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:29,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 11:41:29,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-18 11:41:29,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363701587] [2019-12-18 11:41:29,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:41:29,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:29,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:41:29,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-18 11:41:29,459 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 8 states. [2019-12-18 11:41:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:29,483 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2019-12-18 11:41:29,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:29,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-18 11:41:29,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:29,484 INFO L225 Difference]: With dead ends: 124 [2019-12-18 11:41:29,484 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 11:41:29,484 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-18 11:41:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 11:41:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-12-18 11:41:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-18 11:41:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 274 transitions. [2019-12-18 11:41:29,489 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 274 transitions. Word has length 12 [2019-12-18 11:41:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:29,490 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 274 transitions. [2019-12-18 11:41:29,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:41:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 274 transitions. [2019-12-18 11:41:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:29,490 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:29,490 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:29,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:29,691 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:29,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:29,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 22 times [2019-12-18 11:41:29,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:29,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559214332] [2019-12-18 11:41:29,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:29,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559214332] [2019-12-18 11:41:29,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072231946] [2019-12-18 11:41:29,762 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:29,813 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:29,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:29,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:29,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:29,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:29,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:29,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141174901] [2019-12-18 11:41:29,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:29,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:29,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:29,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:29,912 INFO L87 Difference]: Start difference. First operand 115 states and 274 transitions. Second operand 14 states. [2019-12-18 11:41:30,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:30,047 INFO L93 Difference]: Finished difference Result 133 states and 305 transitions. [2019-12-18 11:41:30,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:30,048 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:30,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:30,049 INFO L225 Difference]: With dead ends: 133 [2019-12-18 11:41:30,049 INFO L226 Difference]: Without dead ends: 132 [2019-12-18 11:41:30,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:30,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-18 11:41:30,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2019-12-18 11:41:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-18 11:41:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 279 transitions. [2019-12-18 11:41:30,054 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 279 transitions. Word has length 12 [2019-12-18 11:41:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:30,054 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 279 transitions. [2019-12-18 11:41:30,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:30,055 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 279 transitions. [2019-12-18 11:41:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:30,055 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:30,055 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:30,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:30,256 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:30,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:30,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 23 times [2019-12-18 11:41:30,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:30,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243494541] [2019-12-18 11:41:30,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:30,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243494541] [2019-12-18 11:41:30,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26129609] [2019-12-18 11:41:30,337 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:30,398 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:30,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:30,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:30,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:30,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:30,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:30,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486325560] [2019-12-18 11:41:30,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:30,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:30,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:30,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:30,497 INFO L87 Difference]: Start difference. First operand 117 states and 279 transitions. Second operand 14 states. [2019-12-18 11:41:30,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:30,622 INFO L93 Difference]: Finished difference Result 140 states and 321 transitions. [2019-12-18 11:41:30,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:30,623 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:30,624 INFO L225 Difference]: With dead ends: 140 [2019-12-18 11:41:30,624 INFO L226 Difference]: Without dead ends: 139 [2019-12-18 11:41:30,625 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:30,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-18 11:41:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2019-12-18 11:41:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-18 11:41:30,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 283 transitions. [2019-12-18 11:41:30,629 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 283 transitions. Word has length 12 [2019-12-18 11:41:30,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:30,630 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 283 transitions. [2019-12-18 11:41:30,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 283 transitions. [2019-12-18 11:41:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:30,631 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:30,631 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:30,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:30,834 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:30,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:30,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 24 times [2019-12-18 11:41:30,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:30,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296381910] [2019-12-18 11:41:30,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:30,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296381910] [2019-12-18 11:41:30,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408820070] [2019-12-18 11:41:30,892 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:30,944 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:30,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:30,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:30,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:31,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:31,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:31,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060914112] [2019-12-18 11:41:31,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:31,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:31,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:31,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:31,075 INFO L87 Difference]: Start difference. First operand 118 states and 283 transitions. Second operand 14 states. [2019-12-18 11:41:31,392 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-18 11:41:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:31,528 INFO L93 Difference]: Finished difference Result 142 states and 323 transitions. [2019-12-18 11:41:31,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:31,528 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:31,530 INFO L225 Difference]: With dead ends: 142 [2019-12-18 11:41:31,530 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 11:41:31,530 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 11:41:31,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 119. [2019-12-18 11:41:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-18 11:41:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 284 transitions. [2019-12-18 11:41:31,535 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 284 transitions. Word has length 12 [2019-12-18 11:41:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:31,535 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 284 transitions. [2019-12-18 11:41:31,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 284 transitions. [2019-12-18 11:41:31,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:31,536 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:31,536 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:31,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:31,741 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:31,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:31,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 25 times [2019-12-18 11:41:31,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:31,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751813400] [2019-12-18 11:41:31,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:31,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751813400] [2019-12-18 11:41:31,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921482195] [2019-12-18 11:41:31,819 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:31,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:31,861 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:31,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:31,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:31,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044199259] [2019-12-18 11:41:31,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:31,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:31,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:31,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:31,942 INFO L87 Difference]: Start difference. First operand 119 states and 284 transitions. Second operand 14 states. [2019-12-18 11:41:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:32,065 INFO L93 Difference]: Finished difference Result 142 states and 326 transitions. [2019-12-18 11:41:32,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:32,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:32,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:32,067 INFO L225 Difference]: With dead ends: 142 [2019-12-18 11:41:32,067 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 11:41:32,067 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:32,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 11:41:32,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2019-12-18 11:41:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 11:41:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-18 11:41:32,071 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-18 11:41:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:32,072 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-18 11:41:32,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-18 11:41:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:32,073 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:32,074 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:32,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:32,277 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:32,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:32,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 26 times [2019-12-18 11:41:32,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:32,277 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640694859] [2019-12-18 11:41:32,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:32,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640694859] [2019-12-18 11:41:32,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289433374] [2019-12-18 11:41:32,338 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:32,390 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:32,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:32,391 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:32,391 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:32,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:32,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:32,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911353353] [2019-12-18 11:41:32,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:32,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:32,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:32,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:32,486 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 14 states. [2019-12-18 11:41:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:32,686 INFO L93 Difference]: Finished difference Result 153 states and 349 transitions. [2019-12-18 11:41:32,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:32,687 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:32,688 INFO L225 Difference]: With dead ends: 153 [2019-12-18 11:41:32,688 INFO L226 Difference]: Without dead ends: 152 [2019-12-18 11:41:32,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-18 11:41:32,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 120. [2019-12-18 11:41:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-18 11:41:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 288 transitions. [2019-12-18 11:41:32,692 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 288 transitions. Word has length 12 [2019-12-18 11:41:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:32,693 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 288 transitions. [2019-12-18 11:41:32,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 288 transitions. [2019-12-18 11:41:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:32,693 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:32,693 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:32,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:32,896 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:32,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 27 times [2019-12-18 11:41:32,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:32,898 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162393535] [2019-12-18 11:41:32,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:32,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162393535] [2019-12-18 11:41:32,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889398138] [2019-12-18 11:41:32,967 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:33,008 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:33,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:33,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:33,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:33,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:33,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:33,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993621440] [2019-12-18 11:41:33,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:33,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:33,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:33,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:33,129 INFO L87 Difference]: Start difference. First operand 120 states and 288 transitions. Second operand 14 states. [2019-12-18 11:41:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:33,336 INFO L93 Difference]: Finished difference Result 158 states and 360 transitions. [2019-12-18 11:41:33,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:33,341 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:33,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:33,342 INFO L225 Difference]: With dead ends: 158 [2019-12-18 11:41:33,342 INFO L226 Difference]: Without dead ends: 157 [2019-12-18 11:41:33,343 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:41:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-18 11:41:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 121. [2019-12-18 11:41:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 11:41:33,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-18 11:41:33,346 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-18 11:41:33,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:33,347 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-18 11:41:33,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:33,347 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-18 11:41:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:33,347 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:33,347 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:33,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:33,548 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:33,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 28 times [2019-12-18 11:41:33,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:33,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925426253] [2019-12-18 11:41:33,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:33,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925426253] [2019-12-18 11:41:33,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092163345] [2019-12-18 11:41:33,615 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:33,656 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:33,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:33,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:33,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:33,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:33,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:33,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605663869] [2019-12-18 11:41:33,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:33,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:33,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:33,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:33,769 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 14 states. [2019-12-18 11:41:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:34,004 INFO L93 Difference]: Finished difference Result 146 states and 333 transitions. [2019-12-18 11:41:34,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:34,005 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:34,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:34,006 INFO L225 Difference]: With dead ends: 146 [2019-12-18 11:41:34,006 INFO L226 Difference]: Without dead ends: 145 [2019-12-18 11:41:34,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:41:34,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-18 11:41:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 121. [2019-12-18 11:41:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 11:41:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 289 transitions. [2019-12-18 11:41:34,011 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 289 transitions. Word has length 12 [2019-12-18 11:41:34,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:34,011 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 289 transitions. [2019-12-18 11:41:34,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 289 transitions. [2019-12-18 11:41:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:34,012 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:34,012 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:34,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:34,215 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:34,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1750434070, now seen corresponding path program 29 times [2019-12-18 11:41:34,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:34,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005954395] [2019-12-18 11:41:34,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:34,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005954395] [2019-12-18 11:41:34,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112745673] [2019-12-18 11:41:34,278 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:34,332 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:34,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:34,333 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:34,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:34,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:34,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:34,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807841530] [2019-12-18 11:41:34,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:34,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:34,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:34,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:34,403 INFO L87 Difference]: Start difference. First operand 121 states and 289 transitions. Second operand 14 states. [2019-12-18 11:41:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:34,519 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-18 11:41:34,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:34,519 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:34,521 INFO L225 Difference]: With dead ends: 143 [2019-12-18 11:41:34,521 INFO L226 Difference]: Without dead ends: 142 [2019-12-18 11:41:34,521 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-18 11:41:34,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2019-12-18 11:41:34,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 11:41:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-18 11:41:34,526 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-18 11:41:34,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:34,526 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-18 11:41:34,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:34,526 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-18 11:41:34,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:34,527 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:34,527 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:34,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:34,730 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:34,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:34,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1750433915, now seen corresponding path program 30 times [2019-12-18 11:41:34,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:34,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049091574] [2019-12-18 11:41:34,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:34,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049091574] [2019-12-18 11:41:34,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934203532] [2019-12-18 11:41:34,815 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:34,857 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:34,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:34,858 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:34,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:34,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:34,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:34,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268876268] [2019-12-18 11:41:34,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:34,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:34,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:34,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:34,934 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 14 states. [2019-12-18 11:41:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:35,120 INFO L93 Difference]: Finished difference Result 159 states and 361 transitions. [2019-12-18 11:41:35,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:35,121 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:35,122 INFO L225 Difference]: With dead ends: 159 [2019-12-18 11:41:35,122 INFO L226 Difference]: Without dead ends: 158 [2019-12-18 11:41:35,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:41:35,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-18 11:41:35,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2019-12-18 11:41:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:41:35,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2019-12-18 11:41:35,128 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 12 [2019-12-18 11:41:35,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:35,128 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2019-12-18 11:41:35,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2019-12-18 11:41:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:35,129 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:35,129 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:35,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:35,332 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:35,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:35,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 31 times [2019-12-18 11:41:35,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:35,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689786297] [2019-12-18 11:41:35,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:35,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689786297] [2019-12-18 11:41:35,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020232734] [2019-12-18 11:41:35,410 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:35,454 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:35,455 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:35,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:35,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:35,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703268401] [2019-12-18 11:41:35,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:35,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:35,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:35,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:35,537 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand 14 states. [2019-12-18 11:41:36,043 WARN L192 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 11:41:36,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:36,374 INFO L93 Difference]: Finished difference Result 170 states and 378 transitions. [2019-12-18 11:41:36,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:36,375 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:36,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:36,376 INFO L225 Difference]: With dead ends: 170 [2019-12-18 11:41:36,376 INFO L226 Difference]: Without dead ends: 169 [2019-12-18 11:41:36,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:36,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-18 11:41:36,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 125. [2019-12-18 11:41:36,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 11:41:36,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-18 11:41:36,381 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-18 11:41:36,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:36,382 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-18 11:41:36,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:36,382 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-18 11:41:36,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:36,382 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:36,382 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:36,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:36,585 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:36,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:36,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 32 times [2019-12-18 11:41:36,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:36,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356969994] [2019-12-18 11:41:36,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:36,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356969994] [2019-12-18 11:41:36,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734515290] [2019-12-18 11:41:36,652 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:36,696 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:36,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:36,697 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:36,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:36,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:36,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:36,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140865498] [2019-12-18 11:41:36,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:36,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:36,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:36,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:36,785 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 14 states. [2019-12-18 11:41:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:37,077 INFO L93 Difference]: Finished difference Result 167 states and 376 transitions. [2019-12-18 11:41:37,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:37,077 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:37,078 INFO L225 Difference]: With dead ends: 167 [2019-12-18 11:41:37,078 INFO L226 Difference]: Without dead ends: 165 [2019-12-18 11:41:37,079 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-18 11:41:37,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2019-12-18 11:41:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 11:41:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 11:41:37,084 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 11:41:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:37,084 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 11:41:37,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 11:41:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:37,085 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:37,085 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:37,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:37,288 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:37,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:37,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 33 times [2019-12-18 11:41:37,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:37,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785629734] [2019-12-18 11:41:37,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:37,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785629734] [2019-12-18 11:41:37,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987475050] [2019-12-18 11:41:37,359 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:37,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:37,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:37,409 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:37,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:37,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:37,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:37,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253230096] [2019-12-18 11:41:37,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:37,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:37,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:37,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:37,484 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 11:41:37,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:37,693 INFO L93 Difference]: Finished difference Result 169 states and 380 transitions. [2019-12-18 11:41:37,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:37,693 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:37,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:37,695 INFO L225 Difference]: With dead ends: 169 [2019-12-18 11:41:37,695 INFO L226 Difference]: Without dead ends: 168 [2019-12-18 11:41:37,695 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-18 11:41:37,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 127. [2019-12-18 11:41:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 11:41:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-18 11:41:37,699 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-18 11:41:37,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:37,699 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-18 11:41:37,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:37,700 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-18 11:41:37,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:37,700 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:37,700 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:37,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:37,903 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:37,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 34 times [2019-12-18 11:41:37,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:37,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373080158] [2019-12-18 11:41:37,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:37,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373080158] [2019-12-18 11:41:37,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193669913] [2019-12-18 11:41:37,972 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:38,014 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:38,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:38,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:38,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:38,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:38,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:38,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883780145] [2019-12-18 11:41:38,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:38,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:38,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:38,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:38,088 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 14 states. [2019-12-18 11:41:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:38,283 INFO L93 Difference]: Finished difference Result 166 states and 380 transitions. [2019-12-18 11:41:38,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:38,284 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:38,286 INFO L225 Difference]: With dead ends: 166 [2019-12-18 11:41:38,286 INFO L226 Difference]: Without dead ends: 165 [2019-12-18 11:41:38,287 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:38,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-18 11:41:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2019-12-18 11:41:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 11:41:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 11:41:38,291 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 11:41:38,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:38,292 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 11:41:38,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 11:41:38,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:38,292 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:38,292 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:38,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:38,497 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:38,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:38,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 35 times [2019-12-18 11:41:38,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:38,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266838744] [2019-12-18 11:41:38,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:38,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266838744] [2019-12-18 11:41:38,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164015193] [2019-12-18 11:41:38,563 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:38,604 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:38,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:38,605 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:38,605 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:38,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:38,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:38,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223892767] [2019-12-18 11:41:38,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:38,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:38,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:38,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:38,681 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 11:41:38,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:38,941 INFO L93 Difference]: Finished difference Result 163 states and 371 transitions. [2019-12-18 11:41:38,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:38,942 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:38,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:38,943 INFO L225 Difference]: With dead ends: 163 [2019-12-18 11:41:38,944 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 11:41:38,944 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:38,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 11:41:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 124. [2019-12-18 11:41:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:41:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-18 11:41:38,948 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-18 11:41:38,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:38,948 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-18 11:41:38,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:38,949 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-18 11:41:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:38,949 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:38,949 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:39,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:39,152 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:39,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 36 times [2019-12-18 11:41:39,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:39,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736821729] [2019-12-18 11:41:39,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736821729] [2019-12-18 11:41:39,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381574204] [2019-12-18 11:41:39,217 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:39,265 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:39,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:39,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:39,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:39,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:39,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820640887] [2019-12-18 11:41:39,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:39,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:39,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:39,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:39,334 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-18 11:41:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:39,549 INFO L93 Difference]: Finished difference Result 152 states and 342 transitions. [2019-12-18 11:41:39,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:39,550 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:39,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:39,551 INFO L225 Difference]: With dead ends: 152 [2019-12-18 11:41:39,552 INFO L226 Difference]: Without dead ends: 151 [2019-12-18 11:41:39,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:39,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-18 11:41:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 124. [2019-12-18 11:41:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:41:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-18 11:41:39,556 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-18 11:41:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:39,556 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-18 11:41:39,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-18 11:41:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:39,557 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:39,557 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:39,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:39,760 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:39,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:39,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517746, now seen corresponding path program 37 times [2019-12-18 11:41:39,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:39,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358890983] [2019-12-18 11:41:39,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358890983] [2019-12-18 11:41:39,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527024872] [2019-12-18 11:41:39,829 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:39,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:39,871 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:39,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:39,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392129256] [2019-12-18 11:41:39,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:39,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:39,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:39,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:39,940 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-18 11:41:40,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:40,275 INFO L93 Difference]: Finished difference Result 167 states and 372 transitions. [2019-12-18 11:41:40,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:40,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:40,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:40,277 INFO L225 Difference]: With dead ends: 167 [2019-12-18 11:41:40,277 INFO L226 Difference]: Without dead ends: 166 [2019-12-18 11:41:40,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-18 11:41:40,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 125. [2019-12-18 11:41:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 11:41:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-18 11:41:40,280 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 12 [2019-12-18 11:41:40,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:40,281 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-18 11:41:40,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-18 11:41:40,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:40,281 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:40,281 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:40,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:40,484 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517901, now seen corresponding path program 38 times [2019-12-18 11:41:40,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:40,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690201785] [2019-12-18 11:41:40,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:40,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690201785] [2019-12-18 11:41:40,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169571145] [2019-12-18 11:41:40,540 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:40,580 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:40,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:40,581 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:40,581 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:40,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:40,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:40,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137698155] [2019-12-18 11:41:40,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:40,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:40,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:40,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:40,695 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 14 states. [2019-12-18 11:41:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:40,952 INFO L93 Difference]: Finished difference Result 160 states and 359 transitions. [2019-12-18 11:41:40,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:40,953 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:40,954 INFO L225 Difference]: With dead ends: 160 [2019-12-18 11:41:40,954 INFO L226 Difference]: Without dead ends: 159 [2019-12-18 11:41:40,955 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-18 11:41:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 124. [2019-12-18 11:41:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:41:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-18 11:41:40,959 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-18 11:41:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:40,959 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-18 11:41:40,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-18 11:41:40,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:40,960 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:40,960 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:41,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:41,163 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:41,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:41,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1542661896, now seen corresponding path program 39 times [2019-12-18 11:41:41,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:41,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516923247] [2019-12-18 11:41:41,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:41,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516923247] [2019-12-18 11:41:41,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442891306] [2019-12-18 11:41:41,232 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:41,279 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:41,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:41,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:41,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:41,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:41,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:41,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004813252] [2019-12-18 11:41:41,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:41,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:41,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:41,367 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-18 11:41:41,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:41,706 INFO L93 Difference]: Finished difference Result 162 states and 361 transitions. [2019-12-18 11:41:41,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:41,706 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:41,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:41,708 INFO L225 Difference]: With dead ends: 162 [2019-12-18 11:41:41,708 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 11:41:41,709 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 11:41:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 126. [2019-12-18 11:41:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 11:41:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 11:41:41,714 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 11:41:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:41,714 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 11:41:41,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 11:41:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:41,715 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:41,715 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:41,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:41,918 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:41,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:41,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1542662051, now seen corresponding path program 40 times [2019-12-18 11:41:41,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:41,920 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569250745] [2019-12-18 11:41:41,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:41,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569250745] [2019-12-18 11:41:41,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610553228] [2019-12-18 11:41:41,981 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:42,029 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:42,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:42,030 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:42,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:42,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:42,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:42,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843353094] [2019-12-18 11:41:42,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:42,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:42,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:42,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:42,157 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 11:41:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:42,471 INFO L93 Difference]: Finished difference Result 178 states and 396 transitions. [2019-12-18 11:41:42,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:41:42,472 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:42,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:42,474 INFO L225 Difference]: With dead ends: 178 [2019-12-18 11:41:42,474 INFO L226 Difference]: Without dead ends: 176 [2019-12-18 11:41:42,474 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-18 11:41:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-18 11:41:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 11:41:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 11:41:42,479 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 11:41:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:42,479 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 11:41:42,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 11:41:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:42,480 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:42,480 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:42,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:42,683 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:42,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666701, now seen corresponding path program 41 times [2019-12-18 11:41:42,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:42,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286281509] [2019-12-18 11:41:42,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:42,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286281509] [2019-12-18 11:41:42,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503485397] [2019-12-18 11:41:42,750 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:42,796 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:42,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:42,797 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:42,797 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:42,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:42,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:42,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173408546] [2019-12-18 11:41:42,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:42,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:42,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:42,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:42,876 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 11:41:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:43,614 INFO L93 Difference]: Finished difference Result 178 states and 393 transitions. [2019-12-18 11:41:43,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:43,614 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:43,616 INFO L225 Difference]: With dead ends: 178 [2019-12-18 11:41:43,616 INFO L226 Difference]: Without dead ends: 176 [2019-12-18 11:41:43,616 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-18 11:41:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2019-12-18 11:41:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 11:41:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-18 11:41:43,620 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-18 11:41:43,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:43,620 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-18 11:41:43,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-18 11:41:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:43,621 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:43,621 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:43,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:43,822 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:43,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:43,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130546, now seen corresponding path program 42 times [2019-12-18 11:41:43,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:43,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486186559] [2019-12-18 11:41:43,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:43,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486186559] [2019-12-18 11:41:43,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846137259] [2019-12-18 11:41:43,884 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:43,931 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:43,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:43,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:43,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:43,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:43,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:43,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231969720] [2019-12-18 11:41:44,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:44,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:44,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:44,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:44,001 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 14 states. [2019-12-18 11:41:44,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:44,290 INFO L93 Difference]: Finished difference Result 161 states and 369 transitions. [2019-12-18 11:41:44,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:41:44,291 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:44,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:44,292 INFO L225 Difference]: With dead ends: 161 [2019-12-18 11:41:44,293 INFO L226 Difference]: Without dead ends: 160 [2019-12-18 11:41:44,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:41:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-18 11:41:44,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2019-12-18 11:41:44,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 11:41:44,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2019-12-18 11:41:44,297 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2019-12-18 11:41:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:44,297 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2019-12-18 11:41:44,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:44,298 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2019-12-18 11:41:44,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:44,298 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:44,298 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:44,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:44,502 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:44,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:44,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130701, now seen corresponding path program 43 times [2019-12-18 11:41:44,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:44,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194853999] [2019-12-18 11:41:44,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:44,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194853999] [2019-12-18 11:41:44,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968721868] [2019-12-18 11:41:44,558 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:44,597 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:44,598 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:44,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:44,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:44,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26109632] [2019-12-18 11:41:44,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:44,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:44,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:44,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:44,662 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 14 states. [2019-12-18 11:41:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:44,934 INFO L93 Difference]: Finished difference Result 179 states and 405 transitions. [2019-12-18 11:41:44,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:44,935 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:44,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:44,936 INFO L225 Difference]: With dead ends: 179 [2019-12-18 11:41:44,936 INFO L226 Difference]: Without dead ends: 178 [2019-12-18 11:41:44,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:44,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-18 11:41:44,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 128. [2019-12-18 11:41:44,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-18 11:41:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 311 transitions. [2019-12-18 11:41:44,942 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 311 transitions. Word has length 12 [2019-12-18 11:41:44,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:44,942 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 311 transitions. [2019-12-18 11:41:44,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:44,942 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 311 transitions. [2019-12-18 11:41:44,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:44,943 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:44,943 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:45,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:45,146 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:45,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 44 times [2019-12-18 11:41:45,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:45,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533049751] [2019-12-18 11:41:45,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:45,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533049751] [2019-12-18 11:41:45,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060935885] [2019-12-18 11:41:45,212 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:45,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:45,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:45,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:45,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:45,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:45,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:45,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629999767] [2019-12-18 11:41:45,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:45,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:45,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:45,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:45,385 INFO L87 Difference]: Start difference. First operand 128 states and 311 transitions. Second operand 14 states. [2019-12-18 11:41:45,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:45,672 INFO L93 Difference]: Finished difference Result 182 states and 409 transitions. [2019-12-18 11:41:45,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:45,673 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:45,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:45,674 INFO L225 Difference]: With dead ends: 182 [2019-12-18 11:41:45,674 INFO L226 Difference]: Without dead ends: 180 [2019-12-18 11:41:45,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-18 11:41:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 129. [2019-12-18 11:41:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 11:41:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2019-12-18 11:41:45,680 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2019-12-18 11:41:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:45,681 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2019-12-18 11:41:45,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2019-12-18 11:41:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:45,682 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:45,682 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:45,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:45,887 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:45,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135506, now seen corresponding path program 45 times [2019-12-18 11:41:45,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:45,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856369488] [2019-12-18 11:41:45,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:45,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856369488] [2019-12-18 11:41:45,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868373053] [2019-12-18 11:41:45,962 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:46,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:46,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:46,017 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:46,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:46,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:46,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:46,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432839346] [2019-12-18 11:41:46,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:46,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:46,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:46,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:46,093 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 14 states. [2019-12-18 11:41:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:46,359 INFO L93 Difference]: Finished difference Result 179 states and 406 transitions. [2019-12-18 11:41:46,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:41:46,360 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:46,361 INFO L225 Difference]: With dead ends: 179 [2019-12-18 11:41:46,361 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 11:41:46,362 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:41:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 11:41:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-18 11:41:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 11:41:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 311 transitions. [2019-12-18 11:41:46,365 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 311 transitions. Word has length 12 [2019-12-18 11:41:46,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:46,366 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 311 transitions. [2019-12-18 11:41:46,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 311 transitions. [2019-12-18 11:41:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:46,366 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:46,367 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:46,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:46,569 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:46,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279656, now seen corresponding path program 46 times [2019-12-18 11:41:46,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:46,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263750111] [2019-12-18 11:41:46,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:46,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263750111] [2019-12-18 11:41:46,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715993737] [2019-12-18 11:41:46,634 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:46,677 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:46,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:46,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:46,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:46,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:46,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:46,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552027549] [2019-12-18 11:41:46,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:46,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:46,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:46,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:46,767 INFO L87 Difference]: Start difference. First operand 131 states and 311 transitions. Second operand 14 states. [2019-12-18 11:41:47,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:47,084 INFO L93 Difference]: Finished difference Result 176 states and 396 transitions. [2019-12-18 11:41:47,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:47,084 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:47,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:47,086 INFO L225 Difference]: With dead ends: 176 [2019-12-18 11:41:47,086 INFO L226 Difference]: Without dead ends: 175 [2019-12-18 11:41:47,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:47,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-18 11:41:47,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 128. [2019-12-18 11:41:47,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-18 11:41:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 299 transitions. [2019-12-18 11:41:47,090 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 299 transitions. Word has length 12 [2019-12-18 11:41:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:47,090 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 299 transitions. [2019-12-18 11:41:47,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 299 transitions. [2019-12-18 11:41:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:47,091 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:47,091 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:47,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:47,294 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:47,294 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-18 11:41:47,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:47,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389952689] [2019-12-18 11:41:47,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:47,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389952689] [2019-12-18 11:41:47,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73987591] [2019-12-18 11:41:47,375 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:47,436 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:41:47,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:47,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:47,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:47,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:47,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:47,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792934374] [2019-12-18 11:41:47,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:47,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:47,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:47,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:47,561 INFO L87 Difference]: Start difference. First operand 128 states and 299 transitions. Second operand 16 states. [2019-12-18 11:41:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:47,699 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-18 11:41:47,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:47,700 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-18 11:41:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:47,701 INFO L225 Difference]: With dead ends: 143 [2019-12-18 11:41:47,701 INFO L226 Difference]: Without dead ends: 142 [2019-12-18 11:41:47,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-18 11:41:47,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 133. [2019-12-18 11:41:47,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-18 11:41:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 313 transitions. [2019-12-18 11:41:47,704 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 313 transitions. Word has length 12 [2019-12-18 11:41:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:47,705 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 313 transitions. [2019-12-18 11:41:47,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:47,705 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 313 transitions. [2019-12-18 11:41:47,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:47,705 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:47,705 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:47,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:47,909 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:47,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:47,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 47 times [2019-12-18 11:41:47,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:47,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483760314] [2019-12-18 11:41:47,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:47,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483760314] [2019-12-18 11:41:47,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565001170] [2019-12-18 11:41:47,977 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:48,021 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:48,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:48,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:48,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:48,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:48,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:48,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322911466] [2019-12-18 11:41:48,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:48,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:48,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:48,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:48,121 INFO L87 Difference]: Start difference. First operand 133 states and 313 transitions. Second operand 16 states. [2019-12-18 11:41:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:48,269 INFO L93 Difference]: Finished difference Result 154 states and 348 transitions. [2019-12-18 11:41:48,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:48,269 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:48,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:48,271 INFO L225 Difference]: With dead ends: 154 [2019-12-18 11:41:48,271 INFO L226 Difference]: Without dead ends: 152 [2019-12-18 11:41:48,271 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:48,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-18 11:41:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2019-12-18 11:41:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-18 11:41:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 314 transitions. [2019-12-18 11:41:48,275 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 314 transitions. Word has length 13 [2019-12-18 11:41:48,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:48,276 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 314 transitions. [2019-12-18 11:41:48,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:48,276 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 314 transitions. [2019-12-18 11:41:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:48,277 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:48,277 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:48,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:48,477 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:48,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:48,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 48 times [2019-12-18 11:41:48,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:48,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489982552] [2019-12-18 11:41:48,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:48,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489982552] [2019-12-18 11:41:48,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654936709] [2019-12-18 11:41:48,550 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:48,602 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:48,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:48,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:48,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:48,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:48,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:48,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398596528] [2019-12-18 11:41:48,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:48,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:48,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:48,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:48,740 INFO L87 Difference]: Start difference. First operand 133 states and 314 transitions. Second operand 16 states. [2019-12-18 11:41:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:48,958 INFO L93 Difference]: Finished difference Result 163 states and 369 transitions. [2019-12-18 11:41:48,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:48,958 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:48,959 INFO L225 Difference]: With dead ends: 163 [2019-12-18 11:41:48,959 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 11:41:48,960 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 11:41:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2019-12-18 11:41:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 11:41:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 318 transitions. [2019-12-18 11:41:48,964 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 318 transitions. Word has length 13 [2019-12-18 11:41:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:48,965 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 318 transitions. [2019-12-18 11:41:48,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 318 transitions. [2019-12-18 11:41:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:48,966 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:48,966 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:49,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:49,167 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:49,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 49 times [2019-12-18 11:41:49,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:49,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373017735] [2019-12-18 11:41:49,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:49,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373017735] [2019-12-18 11:41:49,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802308747] [2019-12-18 11:41:49,232 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:49,279 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:49,280 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:51,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:51,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:51,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967130016] [2019-12-18 11:41:51,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:51,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:51,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:51,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=154, Unknown=1, NotChecked=0, Total=240 [2019-12-18 11:41:51,493 INFO L87 Difference]: Start difference. First operand 134 states and 318 transitions. Second operand 16 states. [2019-12-18 11:41:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:52,104 INFO L93 Difference]: Finished difference Result 164 states and 368 transitions. [2019-12-18 11:41:52,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:52,105 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:52,106 INFO L225 Difference]: With dead ends: 164 [2019-12-18 11:41:52,106 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 11:41:52,107 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=184, Invalid=320, Unknown=2, NotChecked=0, Total=506 [2019-12-18 11:41:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 11:41:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2019-12-18 11:41:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 11:41:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 317 transitions. [2019-12-18 11:41:52,110 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 317 transitions. Word has length 13 [2019-12-18 11:41:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:52,110 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 317 transitions. [2019-12-18 11:41:52,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 317 transitions. [2019-12-18 11:41:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:52,111 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:52,111 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:52,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:52,314 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:52,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:52,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 50 times [2019-12-18 11:41:52,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:52,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116713974] [2019-12-18 11:41:52,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:52,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116713974] [2019-12-18 11:41:52,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427929043] [2019-12-18 11:41:52,407 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:52,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:52,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:52,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:52,452 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:52,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:52,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:52,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904285214] [2019-12-18 11:41:52,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:52,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:52,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:52,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:52,549 INFO L87 Difference]: Start difference. First operand 134 states and 317 transitions. Second operand 16 states. [2019-12-18 11:41:52,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:52,707 INFO L93 Difference]: Finished difference Result 167 states and 378 transitions. [2019-12-18 11:41:52,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:52,707 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:52,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:52,708 INFO L225 Difference]: With dead ends: 167 [2019-12-18 11:41:52,709 INFO L226 Difference]: Without dead ends: 166 [2019-12-18 11:41:52,709 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-18 11:41:52,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 136. [2019-12-18 11:41:52,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 11:41:52,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-18 11:41:52,712 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-18 11:41:52,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:52,712 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-18 11:41:52,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:52,712 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-18 11:41:52,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:52,713 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:52,713 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:52,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:52,916 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:52,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 51 times [2019-12-18 11:41:52,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:52,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386596590] [2019-12-18 11:41:52,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:52,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386596590] [2019-12-18 11:41:52,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685488278] [2019-12-18 11:41:52,992 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:53,035 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:53,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:53,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:53,036 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:53,291 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:41:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:53,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:53,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:53,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767992793] [2019-12-18 11:41:53,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:53,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:53,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:53,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:53,293 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 16 states. [2019-12-18 11:41:54,688 WARN L192 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:41:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:54,729 INFO L93 Difference]: Finished difference Result 179 states and 403 transitions. [2019-12-18 11:41:54,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:54,730 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:54,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:54,731 INFO L225 Difference]: With dead ends: 179 [2019-12-18 11:41:54,731 INFO L226 Difference]: Without dead ends: 178 [2019-12-18 11:41:54,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-18 11:41:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 135. [2019-12-18 11:41:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 11:41:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 321 transitions. [2019-12-18 11:41:54,735 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 321 transitions. Word has length 13 [2019-12-18 11:41:54,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:54,736 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 321 transitions. [2019-12-18 11:41:54,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 321 transitions. [2019-12-18 11:41:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:54,736 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:54,736 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:54,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:54,939 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:54,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 52 times [2019-12-18 11:41:54,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:54,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822050359] [2019-12-18 11:41:54,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:55,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822050359] [2019-12-18 11:41:55,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007824468] [2019-12-18 11:41:55,018 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:55,063 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:55,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:55,063 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:55,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:55,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:55,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:55,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887204332] [2019-12-18 11:41:55,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:55,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:55,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:55,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:55,273 INFO L87 Difference]: Start difference. First operand 135 states and 321 transitions. Second operand 16 states. [2019-12-18 11:41:56,027 WARN L192 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-18 11:41:56,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:56,074 INFO L93 Difference]: Finished difference Result 188 states and 421 transitions. [2019-12-18 11:41:56,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:56,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:56,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:56,076 INFO L225 Difference]: With dead ends: 188 [2019-12-18 11:41:56,076 INFO L226 Difference]: Without dead ends: 187 [2019-12-18 11:41:56,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:56,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-18 11:41:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2019-12-18 11:41:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 11:41:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-18 11:41:56,081 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-18 11:41:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:56,081 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-18 11:41:56,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-18 11:41:56,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:56,082 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:56,082 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:56,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:56,285 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:56,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:56,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 53 times [2019-12-18 11:41:56,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:56,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723448625] [2019-12-18 11:41:56,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:56,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723448625] [2019-12-18 11:41:56,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047265664] [2019-12-18 11:41:56,356 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:56,398 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:56,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:56,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:56,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:57,559 WARN L192 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:41:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:57,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:57,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:57,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827650952] [2019-12-18 11:41:57,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:57,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:57,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:57,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=152, Unknown=1, NotChecked=0, Total=240 [2019-12-18 11:41:57,561 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 16 states. [2019-12-18 11:41:57,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:57,866 INFO L93 Difference]: Finished difference Result 168 states and 377 transitions. [2019-12-18 11:41:57,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:57,867 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:57,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:57,868 INFO L225 Difference]: With dead ends: 168 [2019-12-18 11:41:57,868 INFO L226 Difference]: Without dead ends: 164 [2019-12-18 11:41:57,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=209, Invalid=342, Unknown=1, NotChecked=0, Total=552 [2019-12-18 11:41:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-18 11:41:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 135. [2019-12-18 11:41:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 11:41:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 320 transitions. [2019-12-18 11:41:57,872 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 320 transitions. Word has length 13 [2019-12-18 11:41:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:57,872 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 320 transitions. [2019-12-18 11:41:57,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 320 transitions. [2019-12-18 11:41:57,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:57,873 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:57,873 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:58,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:58,074 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828976, now seen corresponding path program 54 times [2019-12-18 11:41:58,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:58,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350296851] [2019-12-18 11:41:58,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:58,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350296851] [2019-12-18 11:41:58,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630948160] [2019-12-18 11:41:58,146 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:58,183 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:58,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:58,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:58,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:58,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:58,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:58,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188243339] [2019-12-18 11:41:58,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:58,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:58,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:58,271 INFO L87 Difference]: Start difference. First operand 135 states and 320 transitions. Second operand 16 states. [2019-12-18 11:41:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:58,422 INFO L93 Difference]: Finished difference Result 165 states and 375 transitions. [2019-12-18 11:41:58,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:58,423 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:58,424 INFO L225 Difference]: With dead ends: 165 [2019-12-18 11:41:58,424 INFO L226 Difference]: Without dead ends: 164 [2019-12-18 11:41:58,425 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-18 11:41:58,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 138. [2019-12-18 11:41:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:41:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-18 11:41:58,428 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-18 11:41:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:58,428 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-18 11:41:58,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-18 11:41:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:58,429 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:58,429 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:58,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:58,632 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:58,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 55 times [2019-12-18 11:41:58,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:58,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566482445] [2019-12-18 11:41:58,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:58,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566482445] [2019-12-18 11:41:58,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976407415] [2019-12-18 11:41:58,717 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:58,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:58,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:58,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:58,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:58,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572903661] [2019-12-18 11:41:58,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:58,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:58,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:58,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:58,950 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 16 states. [2019-12-18 11:41:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:59,351 INFO L93 Difference]: Finished difference Result 190 states and 429 transitions. [2019-12-18 11:41:59,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:59,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:59,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:59,354 INFO L225 Difference]: With dead ends: 190 [2019-12-18 11:41:59,354 INFO L226 Difference]: Without dead ends: 189 [2019-12-18 11:41:59,355 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:41:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-18 11:41:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 137. [2019-12-18 11:41:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 11:41:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-18 11:41:59,358 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 13 [2019-12-18 11:41:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:59,358 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-18 11:41:59,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-18 11:41:59,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:59,359 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:59,359 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:59,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:59,562 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:59,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:59,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 56 times [2019-12-18 11:41:59,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:59,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122753776] [2019-12-18 11:41:59,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:59,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122753776] [2019-12-18 11:41:59,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787310844] [2019-12-18 11:41:59,631 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:59,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:59,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:59,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:59,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:59,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:59,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:59,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884857016] [2019-12-18 11:41:59,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:59,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:59,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:59,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:59,785 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 16 states. [2019-12-18 11:42:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:00,122 INFO L93 Difference]: Finished difference Result 200 states and 448 transitions. [2019-12-18 11:42:00,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:00,123 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:00,124 INFO L225 Difference]: With dead ends: 200 [2019-12-18 11:42:00,124 INFO L226 Difference]: Without dead ends: 199 [2019-12-18 11:42:00,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-18 11:42:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 138. [2019-12-18 11:42:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-18 11:42:00,128 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-18 11:42:00,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:00,129 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-18 11:42:00,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-18 11:42:00,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:00,129 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:00,129 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:00,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:00,331 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:00,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 57 times [2019-12-18 11:42:00,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:00,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000619537] [2019-12-18 11:42:00,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:00,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000619537] [2019-12-18 11:42:00,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998515991] [2019-12-18 11:42:00,393 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:00,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:42:00,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:00,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:00,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:00,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:00,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:00,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738583724] [2019-12-18 11:42:00,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:00,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:00,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:00,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:00,568 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 16 states. [2019-12-18 11:42:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:01,010 INFO L93 Difference]: Finished difference Result 195 states and 434 transitions. [2019-12-18 11:42:01,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:01,011 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:01,012 INFO L225 Difference]: With dead ends: 195 [2019-12-18 11:42:01,012 INFO L226 Difference]: Without dead ends: 189 [2019-12-18 11:42:01,013 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=445, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:01,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-18 11:42:01,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 138. [2019-12-18 11:42:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:01,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 329 transitions. [2019-12-18 11:42:01,016 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 329 transitions. Word has length 13 [2019-12-18 11:42:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:01,017 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 329 transitions. [2019-12-18 11:42:01,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:01,017 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 329 transitions. [2019-12-18 11:42:01,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:01,017 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:01,017 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:01,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:01,221 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:01,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:01,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 58 times [2019-12-18 11:42:01,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:01,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944635163] [2019-12-18 11:42:01,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:01,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944635163] [2019-12-18 11:42:01,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309067043] [2019-12-18 11:42:01,289 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:01,337 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:01,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:01,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:01,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:01,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:01,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:01,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017510507] [2019-12-18 11:42:01,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:01,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:01,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:01,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:01,460 INFO L87 Difference]: Start difference. First operand 138 states and 329 transitions. Second operand 16 states. [2019-12-18 11:42:01,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:01,793 INFO L93 Difference]: Finished difference Result 194 states and 439 transitions. [2019-12-18 11:42:01,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:01,794 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:01,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:01,795 INFO L225 Difference]: With dead ends: 194 [2019-12-18 11:42:01,795 INFO L226 Difference]: Without dead ends: 193 [2019-12-18 11:42:01,796 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:01,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-18 11:42:01,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 139. [2019-12-18 11:42:01,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 11:42:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-18 11:42:01,800 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 13 [2019-12-18 11:42:01,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:01,800 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-18 11:42:01,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-18 11:42:01,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:01,801 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:01,801 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:02,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:02,004 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:02,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 59 times [2019-12-18 11:42:02,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:02,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443026598] [2019-12-18 11:42:02,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:02,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443026598] [2019-12-18 11:42:02,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549903610] [2019-12-18 11:42:02,091 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:02,133 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:02,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:02,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:02,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:02,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:02,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:02,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282100990] [2019-12-18 11:42:02,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:02,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:02,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:02,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:02,307 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 16 states. [2019-12-18 11:42:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:03,444 INFO L93 Difference]: Finished difference Result 201 states and 456 transitions. [2019-12-18 11:42:03,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:03,445 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:03,446 INFO L225 Difference]: With dead ends: 201 [2019-12-18 11:42:03,446 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 11:42:03,447 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:03,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 11:42:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2019-12-18 11:42:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 329 transitions. [2019-12-18 11:42:03,451 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 329 transitions. Word has length 13 [2019-12-18 11:42:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:03,451 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 329 transitions. [2019-12-18 11:42:03,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 329 transitions. [2019-12-18 11:42:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:03,452 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:03,452 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:03,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:03,656 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:03,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 60 times [2019-12-18 11:42:03,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:03,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720161870] [2019-12-18 11:42:03,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:03,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720161870] [2019-12-18 11:42:03,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173622864] [2019-12-18 11:42:03,752 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:03,816 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:03,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:03,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:03,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:08,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:08,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:08,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693735865] [2019-12-18 11:42:08,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:08,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:08,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:08,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=156, Unknown=2, NotChecked=0, Total=240 [2019-12-18 11:42:08,091 INFO L87 Difference]: Start difference. First operand 138 states and 329 transitions. Second operand 16 states. [2019-12-18 11:42:08,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:08,469 INFO L93 Difference]: Finished difference Result 186 states and 420 transitions. [2019-12-18 11:42:08,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:08,469 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:08,471 INFO L225 Difference]: With dead ends: 186 [2019-12-18 11:42:08,471 INFO L226 Difference]: Without dead ends: 185 [2019-12-18 11:42:08,471 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=217, Invalid=381, Unknown=2, NotChecked=0, Total=600 [2019-12-18 11:42:08,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-18 11:42:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 136. [2019-12-18 11:42:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 11:42:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 323 transitions. [2019-12-18 11:42:08,475 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 323 transitions. Word has length 13 [2019-12-18 11:42:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:08,475 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 323 transitions. [2019-12-18 11:42:08,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 323 transitions. [2019-12-18 11:42:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:08,475 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:08,476 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:08,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:08,676 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:08,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:08,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 61 times [2019-12-18 11:42:08,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:08,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950308207] [2019-12-18 11:42:08,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:08,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950308207] [2019-12-18 11:42:08,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621851766] [2019-12-18 11:42:08,745 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:08,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:08,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:08,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:08,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:08,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013375274] [2019-12-18 11:42:08,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:08,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:08,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:08,874 INFO L87 Difference]: Start difference. First operand 136 states and 323 transitions. Second operand 16 states. [2019-12-18 11:42:09,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:09,024 INFO L93 Difference]: Finished difference Result 162 states and 365 transitions. [2019-12-18 11:42:09,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:42:09,025 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:09,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:09,026 INFO L225 Difference]: With dead ends: 162 [2019-12-18 11:42:09,026 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 11:42:09,026 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:42:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 11:42:09,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 141. [2019-12-18 11:42:09,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:42:09,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-18 11:42:09,030 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-18 11:42:09,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:09,030 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-18 11:42:09,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:09,030 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-18 11:42:09,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:09,031 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:09,031 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:09,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:09,234 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:09,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:09,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118190, now seen corresponding path program 62 times [2019-12-18 11:42:09,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:09,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623219624] [2019-12-18 11:42:09,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:09,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623219624] [2019-12-18 11:42:09,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227152701] [2019-12-18 11:42:09,307 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:09,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:09,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:09,349 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:09,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:09,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:09,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:09,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956467151] [2019-12-18 11:42:09,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:09,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:09,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:09,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:09,437 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-18 11:42:09,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:09,684 INFO L93 Difference]: Finished difference Result 183 states and 412 transitions. [2019-12-18 11:42:09,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:09,684 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:09,686 INFO L225 Difference]: With dead ends: 183 [2019-12-18 11:42:09,686 INFO L226 Difference]: Without dead ends: 182 [2019-12-18 11:42:09,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-18 11:42:09,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2019-12-18 11:42:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:42:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 336 transitions. [2019-12-18 11:42:09,689 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 336 transitions. Word has length 13 [2019-12-18 11:42:09,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:09,689 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 336 transitions. [2019-12-18 11:42:09,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:09,689 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 336 transitions. [2019-12-18 11:42:09,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:09,690 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:09,690 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:09,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:09,891 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:09,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122840, now seen corresponding path program 63 times [2019-12-18 11:42:09,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:09,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163835863] [2019-12-18 11:42:09,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:09,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163835863] [2019-12-18 11:42:09,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817743008] [2019-12-18 11:42:09,972 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:10,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:10,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:10,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:10,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:10,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:10,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:10,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422657276] [2019-12-18 11:42:10,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:10,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:10,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:10,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:10,109 INFO L87 Difference]: Start difference. First operand 140 states and 336 transitions. Second operand 16 states. [2019-12-18 11:42:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:11,081 INFO L93 Difference]: Finished difference Result 208 states and 461 transitions. [2019-12-18 11:42:11,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:11,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:11,083 INFO L225 Difference]: With dead ends: 208 [2019-12-18 11:42:11,084 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 11:42:11,084 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 11:42:11,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2019-12-18 11:42:11,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:42:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-18 11:42:11,087 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-18 11:42:11,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:11,087 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-18 11:42:11,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-18 11:42:11,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:11,088 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:11,088 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:11,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:11,288 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:11,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122995, now seen corresponding path program 64 times [2019-12-18 11:42:11,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:11,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408266429] [2019-12-18 11:42:11,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:11,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408266429] [2019-12-18 11:42:11,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000281058] [2019-12-18 11:42:11,360 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:11,402 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:11,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:11,403 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:11,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:11,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:11,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:11,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105387336] [2019-12-18 11:42:11,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:11,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:11,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:11,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:11,508 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-18 11:42:11,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:11,830 INFO L93 Difference]: Finished difference Result 192 states and 432 transitions. [2019-12-18 11:42:11,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:11,830 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:11,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:11,832 INFO L225 Difference]: With dead ends: 192 [2019-12-18 11:42:11,832 INFO L226 Difference]: Without dead ends: 191 [2019-12-18 11:42:11,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:11,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-18 11:42:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 139. [2019-12-18 11:42:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 11:42:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 332 transitions. [2019-12-18 11:42:11,836 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 332 transitions. Word has length 13 [2019-12-18 11:42:11,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:11,836 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 332 transitions. [2019-12-18 11:42:11,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 332 transitions. [2019-12-18 11:42:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:11,837 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:11,837 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:12,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:12,040 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:12,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 65 times [2019-12-18 11:42:12,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:12,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692620625] [2019-12-18 11:42:12,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:12,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692620625] [2019-12-18 11:42:12,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523016128] [2019-12-18 11:42:12,129 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:12,177 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:12,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:12,178 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:12,179 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:12,665 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_224 Int)) (and (<= c_~i~0 (+ v_~i~0_224 (* 2 c_~j~0))) (<= (div (+ (* v_~i~0_224 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~i~0_224 2)))) is different from true [2019-12-18 11:42:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:12,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:12,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:12,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886304842] [2019-12-18 11:42:12,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:12,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:12,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:12,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=141, Unknown=1, NotChecked=26, Total=240 [2019-12-18 11:42:12,667 INFO L87 Difference]: Start difference. First operand 139 states and 332 transitions. Second operand 16 states. [2019-12-18 11:42:15,602 WARN L192 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2019-12-18 11:42:15,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:15,617 INFO L93 Difference]: Finished difference Result 218 states and 483 transitions. [2019-12-18 11:42:15,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:42:15,617 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:15,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:15,619 INFO L225 Difference]: With dead ends: 218 [2019-12-18 11:42:15,619 INFO L226 Difference]: Without dead ends: 217 [2019-12-18 11:42:15,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=267, Invalid=546, Unknown=3, NotChecked=54, Total=870 [2019-12-18 11:42:15,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-18 11:42:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 141. [2019-12-18 11:42:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:42:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-18 11:42:15,623 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-18 11:42:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:15,623 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-18 11:42:15,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-18 11:42:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:15,624 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:15,624 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:15,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:15,824 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:15,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 66 times [2019-12-18 11:42:15,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:15,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236926249] [2019-12-18 11:42:15,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:15,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236926249] [2019-12-18 11:42:15,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343533262] [2019-12-18 11:42:15,908 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:15,947 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:15,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:15,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:15,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:16,534 WARN L192 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:42:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:16,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:16,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:16,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576573037] [2019-12-18 11:42:16,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:16,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:16,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:16,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:16,536 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-18 11:42:17,462 WARN L192 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:18,269 WARN L192 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:42:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:18,290 INFO L93 Difference]: Finished difference Result 224 states and 504 transitions. [2019-12-18 11:42:18,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:18,291 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:18,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:18,293 INFO L225 Difference]: With dead ends: 224 [2019-12-18 11:42:18,293 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 11:42:18,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=244, Invalid=457, Unknown=1, NotChecked=0, Total=702 [2019-12-18 11:42:18,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 11:42:18,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 143. [2019-12-18 11:42:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 11:42:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-18 11:42:18,296 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 13 [2019-12-18 11:42:18,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:18,297 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-18 11:42:18,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-18 11:42:18,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:18,297 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:18,297 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:18,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:18,498 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:18,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 67 times [2019-12-18 11:42:18,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:18,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080021925] [2019-12-18 11:42:18,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:18,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080021925] [2019-12-18 11:42:18,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963725249] [2019-12-18 11:42:18,565 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:18,607 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:18,608 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:19,192 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_231 Int)) (and (<= c_~i~0 (+ c_~j~0 v_~i~0_231)) (<= (div (+ (* v_~i~0_231 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ (* 2 v_~i~0_231) 2)))) is different from true [2019-12-18 11:42:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:19,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:19,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:19,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761720524] [2019-12-18 11:42:19,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:19,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:19,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:19,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=141, Unknown=1, NotChecked=26, Total=240 [2019-12-18 11:42:19,194 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 16 states. [2019-12-18 11:42:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:19,649 INFO L93 Difference]: Finished difference Result 216 states and 490 transitions. [2019-12-18 11:42:19,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:19,649 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:19,651 INFO L225 Difference]: With dead ends: 216 [2019-12-18 11:42:19,651 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 11:42:19,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=535, Unknown=1, NotChecked=54, Total=870 [2019-12-18 11:42:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 11:42:19,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 142. [2019-12-18 11:42:19,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 11:42:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 344 transitions. [2019-12-18 11:42:19,654 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 344 transitions. Word has length 13 [2019-12-18 11:42:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:19,654 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 344 transitions. [2019-12-18 11:42:19,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 344 transitions. [2019-12-18 11:42:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:19,655 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:19,655 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:19,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:19,856 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:19,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:19,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 68 times [2019-12-18 11:42:19,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:19,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915495293] [2019-12-18 11:42:19,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:19,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915495293] [2019-12-18 11:42:19,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156097276] [2019-12-18 11:42:19,936 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:19,975 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:19,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:19,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:19,977 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:20,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:20,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:20,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245738450] [2019-12-18 11:42:20,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:20,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:20,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:20,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:20,077 INFO L87 Difference]: Start difference. First operand 142 states and 344 transitions. Second operand 16 states. [2019-12-18 11:42:20,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:20,439 INFO L93 Difference]: Finished difference Result 199 states and 449 transitions. [2019-12-18 11:42:20,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:42:20,439 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:20,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:20,441 INFO L225 Difference]: With dead ends: 199 [2019-12-18 11:42:20,442 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 11:42:20,442 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 11:42:20,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 144. [2019-12-18 11:42:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:42:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 352 transitions. [2019-12-18 11:42:20,447 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 352 transitions. Word has length 13 [2019-12-18 11:42:20,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:20,448 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 352 transitions. [2019-12-18 11:42:20,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 352 transitions. [2019-12-18 11:42:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:20,449 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:20,449 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:20,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:20,653 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:20,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 69 times [2019-12-18 11:42:20,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:20,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001920429] [2019-12-18 11:42:20,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:20,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001920429] [2019-12-18 11:42:20,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292925829] [2019-12-18 11:42:20,765 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:20,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:20,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:20,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:20,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:20,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:20,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:20,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488031525] [2019-12-18 11:42:20,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:20,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:20,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:20,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:20,919 INFO L87 Difference]: Start difference. First operand 144 states and 352 transitions. Second operand 16 states. [2019-12-18 11:42:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:21,218 INFO L93 Difference]: Finished difference Result 211 states and 484 transitions. [2019-12-18 11:42:21,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:21,219 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:21,221 INFO L225 Difference]: With dead ends: 211 [2019-12-18 11:42:21,221 INFO L226 Difference]: Without dead ends: 210 [2019-12-18 11:42:21,221 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:21,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-18 11:42:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 143. [2019-12-18 11:42:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 11:42:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-18 11:42:21,225 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 13 [2019-12-18 11:42:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:21,225 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-18 11:42:21,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-18 11:42:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:21,225 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:21,225 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:21,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:21,426 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:21,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 70 times [2019-12-18 11:42:21,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:21,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560929673] [2019-12-18 11:42:21,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:21,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560929673] [2019-12-18 11:42:21,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35384365] [2019-12-18 11:42:21,504 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:21,548 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:21,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:21,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:21,549 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:21,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:21,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:21,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508892361] [2019-12-18 11:42:21,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:21,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:21,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:21,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:21,648 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 16 states. [2019-12-18 11:42:21,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:21,913 INFO L93 Difference]: Finished difference Result 219 states and 500 transitions. [2019-12-18 11:42:21,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:21,914 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:21,916 INFO L225 Difference]: With dead ends: 219 [2019-12-18 11:42:21,916 INFO L226 Difference]: Without dead ends: 218 [2019-12-18 11:42:21,916 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:21,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-18 11:42:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 144. [2019-12-18 11:42:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:42:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 352 transitions. [2019-12-18 11:42:21,920 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 352 transitions. Word has length 13 [2019-12-18 11:42:21,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:21,920 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 352 transitions. [2019-12-18 11:42:21,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:21,920 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 352 transitions. [2019-12-18 11:42:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:21,921 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:21,921 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:22,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:22,121 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:22,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:22,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 71 times [2019-12-18 11:42:22,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:22,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108436900] [2019-12-18 11:42:22,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:22,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108436900] [2019-12-18 11:42:22,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884896054] [2019-12-18 11:42:22,196 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:22,236 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:22,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:22,237 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:22,237 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:22,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:22,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:22,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785487577] [2019-12-18 11:42:22,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:22,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:22,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:22,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:22,325 INFO L87 Difference]: Start difference. First operand 144 states and 352 transitions. Second operand 16 states. [2019-12-18 11:42:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:22,629 INFO L93 Difference]: Finished difference Result 210 states and 476 transitions. [2019-12-18 11:42:22,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:22,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:22,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:22,631 INFO L225 Difference]: With dead ends: 210 [2019-12-18 11:42:22,631 INFO L226 Difference]: Without dead ends: 203 [2019-12-18 11:42:22,632 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:22,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-18 11:42:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 141. [2019-12-18 11:42:22,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:42:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 337 transitions. [2019-12-18 11:42:22,634 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 337 transitions. Word has length 13 [2019-12-18 11:42:22,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:22,634 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 337 transitions. [2019-12-18 11:42:22,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:22,634 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 337 transitions. [2019-12-18 11:42:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:22,635 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:22,635 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:22,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:22,836 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:22,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:22,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 72 times [2019-12-18 11:42:22,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:22,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341140022] [2019-12-18 11:42:22,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:22,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341140022] [2019-12-18 11:42:22,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682253351] [2019-12-18 11:42:22,912 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:22,951 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:42:22,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:22,952 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:22,953 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:23,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:23,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:23,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23902891] [2019-12-18 11:42:23,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:23,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:23,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:23,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:23,036 INFO L87 Difference]: Start difference. First operand 141 states and 337 transitions. Second operand 16 states. [2019-12-18 11:42:23,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:23,400 INFO L93 Difference]: Finished difference Result 206 states and 464 transitions. [2019-12-18 11:42:23,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:23,400 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:23,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:23,402 INFO L225 Difference]: With dead ends: 206 [2019-12-18 11:42:23,402 INFO L226 Difference]: Without dead ends: 205 [2019-12-18 11:42:23,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:23,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-18 11:42:23,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 138. [2019-12-18 11:42:23,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 11:42:23,406 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 11:42:23,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:23,406 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 11:42:23,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 11:42:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:23,407 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:23,407 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:23,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:23,611 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:23,611 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 73 times [2019-12-18 11:42:23,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:23,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205736927] [2019-12-18 11:42:23,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:23,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205736927] [2019-12-18 11:42:23,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746628763] [2019-12-18 11:42:23,681 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:23,724 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:23,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:23,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:23,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:23,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283217025] [2019-12-18 11:42:23,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:23,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:23,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:23,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:23,811 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 11:42:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:24,108 INFO L93 Difference]: Finished difference Result 173 states and 386 transitions. [2019-12-18 11:42:24,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:24,108 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:24,110 INFO L225 Difference]: With dead ends: 173 [2019-12-18 11:42:24,110 INFO L226 Difference]: Without dead ends: 172 [2019-12-18 11:42:24,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:24,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-18 11:42:24,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 138. [2019-12-18 11:42:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 11:42:24,113 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 11:42:24,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:24,114 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 11:42:24,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:24,114 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 11:42:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:24,115 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:24,115 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:24,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:24,317 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:24,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:24,318 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 74 times [2019-12-18 11:42:24,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:24,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046706706] [2019-12-18 11:42:24,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:24,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046706706] [2019-12-18 11:42:24,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053736432] [2019-12-18 11:42:24,396 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:24,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:24,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:24,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:24,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:24,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:24,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:24,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795591808] [2019-12-18 11:42:24,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:24,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:24,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:24,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:24,529 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 11:42:25,220 WARN L192 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-18 11:42:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:25,279 INFO L93 Difference]: Finished difference Result 189 states and 417 transitions. [2019-12-18 11:42:25,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:25,280 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:25,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:25,281 INFO L225 Difference]: With dead ends: 189 [2019-12-18 11:42:25,281 INFO L226 Difference]: Without dead ends: 188 [2019-12-18 11:42:25,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:25,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-18 11:42:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 139. [2019-12-18 11:42:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 11:42:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2019-12-18 11:42:25,285 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 13 [2019-12-18 11:42:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:25,285 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2019-12-18 11:42:25,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2019-12-18 11:42:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:25,285 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:25,285 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:25,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:25,486 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:25,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:25,487 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 75 times [2019-12-18 11:42:25,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:25,487 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973301798] [2019-12-18 11:42:25,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:25,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973301798] [2019-12-18 11:42:25,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538481204] [2019-12-18 11:42:25,554 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:25,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:25,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:25,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:25,600 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:25,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:25,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:25,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176069073] [2019-12-18 11:42:25,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:25,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:25,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:25,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:25,697 INFO L87 Difference]: Start difference. First operand 139 states and 331 transitions. Second operand 16 states. [2019-12-18 11:42:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:26,061 INFO L93 Difference]: Finished difference Result 182 states and 406 transitions. [2019-12-18 11:42:26,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:26,061 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:26,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:26,063 INFO L225 Difference]: With dead ends: 182 [2019-12-18 11:42:26,063 INFO L226 Difference]: Without dead ends: 181 [2019-12-18 11:42:26,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-18 11:42:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 138. [2019-12-18 11:42:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 11:42:26,066 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 11:42:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:26,067 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 11:42:26,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:26,067 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 11:42:26,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:26,067 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:26,067 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:26,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:26,268 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:26,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:26,268 INFO L82 PathProgramCache]: Analyzing trace with hash -573409227, now seen corresponding path program 76 times [2019-12-18 11:42:26,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:26,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58283933] [2019-12-18 11:42:26,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:26,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58283933] [2019-12-18 11:42:26,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578877088] [2019-12-18 11:42:26,345 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:26,387 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:26,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:26,388 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:26,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:27,015 WARN L192 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:42:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:27,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:27,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:27,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475115980] [2019-12-18 11:42:27,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:27,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:27,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:27,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:27,017 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 11:42:27,693 WARN L192 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:30,443 INFO L93 Difference]: Finished difference Result 199 states and 439 transitions. [2019-12-18 11:42:30,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:30,444 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:30,445 INFO L225 Difference]: With dead ends: 199 [2019-12-18 11:42:30,445 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 11:42:30,446 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=231, Invalid=469, Unknown=2, NotChecked=0, Total=702 [2019-12-18 11:42:30,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 11:42:30,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 140. [2019-12-18 11:42:30,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:42:30,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-18 11:42:30,449 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-18 11:42:30,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:30,449 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-18 11:42:30,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:30,450 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-18 11:42:30,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:30,450 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:30,450 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:30,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:30,653 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:30,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:30,659 INFO L82 PathProgramCache]: Analyzing trace with hash -573409382, now seen corresponding path program 77 times [2019-12-18 11:42:30,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:30,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120594853] [2019-12-18 11:42:30,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:30,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120594853] [2019-12-18 11:42:30,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440502880] [2019-12-18 11:42:30,728 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:30,768 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:30,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:30,769 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:30,770 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:31,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:31,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:31,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928739272] [2019-12-18 11:42:31,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:31,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:31,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:31,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2019-12-18 11:42:31,780 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-18 11:42:32,379 WARN L192 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:33,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:33,174 INFO L93 Difference]: Finished difference Result 215 states and 476 transitions. [2019-12-18 11:42:33,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:33,175 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:33,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:33,177 INFO L225 Difference]: With dead ends: 215 [2019-12-18 11:42:33,177 INFO L226 Difference]: Without dead ends: 213 [2019-12-18 11:42:33,177 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=229, Invalid=472, Unknown=1, NotChecked=0, Total=702 [2019-12-18 11:42:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-18 11:42:33,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 140. [2019-12-18 11:42:33,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:42:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-18 11:42:33,180 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-18 11:42:33,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:33,180 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-18 11:42:33,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:33,181 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-18 11:42:33,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:33,181 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:33,181 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:33,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:33,382 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:33,382 INFO L82 PathProgramCache]: Analyzing trace with hash -573414032, now seen corresponding path program 78 times [2019-12-18 11:42:33,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:33,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604299180] [2019-12-18 11:42:33,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:33,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604299180] [2019-12-18 11:42:33,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848387684] [2019-12-18 11:42:33,453 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:33,512 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:33,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:33,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:33,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:33,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:33,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:33,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448244254] [2019-12-18 11:42:33,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:33,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:33,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:33,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:33,618 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-18 11:42:34,116 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2019-12-18 11:42:34,849 WARN L192 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-18 11:42:35,382 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:42:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:35,411 INFO L93 Difference]: Finished difference Result 201 states and 451 transitions. [2019-12-18 11:42:35,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:35,412 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:35,413 INFO L225 Difference]: With dead ends: 201 [2019-12-18 11:42:35,413 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 11:42:35,414 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:42:35,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 11:42:35,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2019-12-18 11:42:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 11:42:35,417 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 11:42:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:35,418 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 11:42:35,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:35,418 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 11:42:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:35,418 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:35,418 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:35,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:35,619 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:35,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:35,619 INFO L82 PathProgramCache]: Analyzing trace with hash -577877877, now seen corresponding path program 79 times [2019-12-18 11:42:35,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:35,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568039517] [2019-12-18 11:42:35,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:35,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568039517] [2019-12-18 11:42:35,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802588933] [2019-12-18 11:42:35,699 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:35,742 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:35,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:35,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:35,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:35,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741078363] [2019-12-18 11:42:35,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:35,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:35,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:35,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:35,850 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 11:42:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:36,370 INFO L93 Difference]: Finished difference Result 187 states and 415 transitions. [2019-12-18 11:42:36,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:36,371 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:36,372 INFO L225 Difference]: With dead ends: 187 [2019-12-18 11:42:36,372 INFO L226 Difference]: Without dead ends: 186 [2019-12-18 11:42:36,373 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:36,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-18 11:42:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 141. [2019-12-18 11:42:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:42:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-18 11:42:36,376 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-18 11:42:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:36,376 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-18 11:42:36,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-18 11:42:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:36,377 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:36,377 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:36,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:36,577 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:36,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:36,578 INFO L82 PathProgramCache]: Analyzing trace with hash -577878032, now seen corresponding path program 80 times [2019-12-18 11:42:36,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:36,579 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377250471] [2019-12-18 11:42:36,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:36,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377250471] [2019-12-18 11:42:36,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618478641] [2019-12-18 11:42:36,646 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:36,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:36,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:36,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:36,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:40,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:40,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:40,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261464889] [2019-12-18 11:42:40,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:40,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:40,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:40,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:40,937 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 16 states. [2019-12-18 11:42:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:41,788 INFO L93 Difference]: Finished difference Result 207 states and 458 transitions. [2019-12-18 11:42:41,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:41,788 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:41,790 INFO L225 Difference]: With dead ends: 207 [2019-12-18 11:42:41,790 INFO L226 Difference]: Without dead ends: 206 [2019-12-18 11:42:41,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-18 11:42:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 140. [2019-12-18 11:42:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:42:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-18 11:42:41,794 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-18 11:42:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:41,794 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-18 11:42:41,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:41,794 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-18 11:42:41,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:41,795 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:41,795 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:41,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:41,996 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:41,996 INFO L82 PathProgramCache]: Analyzing trace with hash -577882682, now seen corresponding path program 81 times [2019-12-18 11:42:41,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:41,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487439933] [2019-12-18 11:42:41,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:42,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487439933] [2019-12-18 11:42:42,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169756623] [2019-12-18 11:42:42,066 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:42,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:42,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:42,108 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:42,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:42,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:42,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:42,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825335722] [2019-12-18 11:42:42,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:42,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:42,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:42,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:42,226 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-18 11:42:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:42,685 INFO L93 Difference]: Finished difference Result 229 states and 508 transitions. [2019-12-18 11:42:42,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:42,686 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:42,687 INFO L225 Difference]: With dead ends: 229 [2019-12-18 11:42:42,688 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 11:42:42,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 11:42:42,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 143. [2019-12-18 11:42:42,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 11:42:42,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 347 transitions. [2019-12-18 11:42:42,691 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 347 transitions. Word has length 13 [2019-12-18 11:42:42,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:42,692 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 347 transitions. [2019-12-18 11:42:42,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:42,692 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 347 transitions. [2019-12-18 11:42:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:42,692 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:42,692 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:42,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:42,895 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:42,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:42,896 INFO L82 PathProgramCache]: Analyzing trace with hash -577882837, now seen corresponding path program 82 times [2019-12-18 11:42:42,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:42,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789174550] [2019-12-18 11:42:42,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:42,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789174550] [2019-12-18 11:42:42,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106386598] [2019-12-18 11:42:42,967 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:43,008 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:43,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:43,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:43,010 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:43,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:43,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:43,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709340616] [2019-12-18 11:42:43,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:43,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:43,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:43,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:43,172 INFO L87 Difference]: Start difference. First operand 143 states and 347 transitions. Second operand 16 states. [2019-12-18 11:42:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:44,088 INFO L93 Difference]: Finished difference Result 214 states and 479 transitions. [2019-12-18 11:42:44,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:44,088 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:44,090 INFO L225 Difference]: With dead ends: 214 [2019-12-18 11:42:44,090 INFO L226 Difference]: Without dead ends: 212 [2019-12-18 11:42:44,090 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-18 11:42:44,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 141. [2019-12-18 11:42:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:42:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-18 11:42:44,094 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-18 11:42:44,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:44,094 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-18 11:42:44,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:44,094 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-18 11:42:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:44,094 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:44,095 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:44,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:44,295 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:44,296 INFO L82 PathProgramCache]: Analyzing trace with hash -578026987, now seen corresponding path program 83 times [2019-12-18 11:42:44,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:44,296 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778907635] [2019-12-18 11:42:44,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:44,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778907635] [2019-12-18 11:42:44,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805599642] [2019-12-18 11:42:44,373 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:44,416 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:44,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:44,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:44,419 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:44,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:44,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:44,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899737320] [2019-12-18 11:42:44,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:44,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:44,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:44,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:44,549 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 16 states. [2019-12-18 11:42:45,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:45,118 INFO L93 Difference]: Finished difference Result 224 states and 495 transitions. [2019-12-18 11:42:45,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:45,118 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:45,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:45,120 INFO L225 Difference]: With dead ends: 224 [2019-12-18 11:42:45,121 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 11:42:45,121 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:45,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 11:42:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 142. [2019-12-18 11:42:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 11:42:45,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-18 11:42:45,125 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-18 11:42:45,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:45,125 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-18 11:42:45,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:45,125 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-18 11:42:45,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:45,126 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:45,126 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:45,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:45,327 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:45,327 INFO L82 PathProgramCache]: Analyzing trace with hash -716406027, now seen corresponding path program 84 times [2019-12-18 11:42:45,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:45,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202518619] [2019-12-18 11:42:45,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:45,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202518619] [2019-12-18 11:42:45,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012833043] [2019-12-18 11:42:45,434 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:45,475 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:45,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:45,476 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:45,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:45,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:45,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:45,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584419614] [2019-12-18 11:42:45,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:45,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:45,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:45,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:45,552 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 16 states. [2019-12-18 11:42:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:45,892 INFO L93 Difference]: Finished difference Result 184 states and 421 transitions. [2019-12-18 11:42:45,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:45,893 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:45,894 INFO L225 Difference]: With dead ends: 184 [2019-12-18 11:42:45,894 INFO L226 Difference]: Without dead ends: 183 [2019-12-18 11:42:45,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:45,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-18 11:42:45,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 145. [2019-12-18 11:42:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:42:45,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 11:42:45,898 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 11:42:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:45,899 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 11:42:45,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:45,899 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 11:42:45,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:45,899 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:45,899 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:46,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:46,101 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:46,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:46,102 INFO L82 PathProgramCache]: Analyzing trace with hash -716406182, now seen corresponding path program 85 times [2019-12-18 11:42:46,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:46,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209014983] [2019-12-18 11:42:46,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:46,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209014983] [2019-12-18 11:42:46,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033609936] [2019-12-18 11:42:46,189 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:46,230 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:46,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:46,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:46,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:46,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870309407] [2019-12-18 11:42:46,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:46,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:46,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:46,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:46,314 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 11:42:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:46,724 INFO L93 Difference]: Finished difference Result 216 states and 492 transitions. [2019-12-18 11:42:46,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:46,725 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:46,727 INFO L225 Difference]: With dead ends: 216 [2019-12-18 11:42:46,727 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 11:42:46,727 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:46,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 11:42:46,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 144. [2019-12-18 11:42:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:42:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-18 11:42:46,731 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-18 11:42:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:46,731 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-18 11:42:46,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:46,732 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-18 11:42:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:46,732 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:46,732 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:46,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:46,935 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:46,936 INFO L82 PathProgramCache]: Analyzing trace with hash -716410832, now seen corresponding path program 86 times [2019-12-18 11:42:46,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:46,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967767498] [2019-12-18 11:42:46,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:47,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967767498] [2019-12-18 11:42:47,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952789815] [2019-12-18 11:42:47,018 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:47,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:47,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:47,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:47,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:47,423 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-18 11:42:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:47,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:47,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:47,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043745217] [2019-12-18 11:42:47,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:47,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:47,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:47,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:47,425 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-18 11:42:47,950 WARN L192 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2019-12-18 11:42:48,324 WARN L192 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 11:42:49,260 WARN L192 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 11:42:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:49,285 INFO L93 Difference]: Finished difference Result 222 states and 500 transitions. [2019-12-18 11:42:49,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:49,285 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:49,287 INFO L225 Difference]: With dead ends: 222 [2019-12-18 11:42:49,287 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:42:49,287 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:49,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:42:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 145. [2019-12-18 11:42:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:42:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 11:42:49,291 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 11:42:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:49,291 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 11:42:49,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 11:42:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:49,292 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:49,292 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:49,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:49,493 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:49,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:49,494 INFO L82 PathProgramCache]: Analyzing trace with hash -716410987, now seen corresponding path program 87 times [2019-12-18 11:42:49,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:49,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007980867] [2019-12-18 11:42:49,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:49,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007980867] [2019-12-18 11:42:49,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448081905] [2019-12-18 11:42:49,564 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:49,606 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:42:49,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:49,607 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:49,608 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:49,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:49,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:49,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979929107] [2019-12-18 11:42:49,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:49,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:49,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:49,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:49,711 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 11:42:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:50,129 INFO L93 Difference]: Finished difference Result 226 states and 511 transitions. [2019-12-18 11:42:50,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:42:50,129 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:50,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:50,131 INFO L225 Difference]: With dead ends: 226 [2019-12-18 11:42:50,131 INFO L226 Difference]: Without dead ends: 224 [2019-12-18 11:42:50,132 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:50,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-18 11:42:50,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 144. [2019-12-18 11:42:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:42:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-18 11:42:50,136 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-18 11:42:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:50,136 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-18 11:42:50,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-18 11:42:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:50,136 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:50,136 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:50,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:50,338 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:50,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:50,339 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 88 times [2019-12-18 11:42:50,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:50,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162998823] [2019-12-18 11:42:50,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:50,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162998823] [2019-12-18 11:42:50,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691637924] [2019-12-18 11:42:50,421 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:50,461 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:50,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:50,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:50,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:50,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:50,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:50,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150361614] [2019-12-18 11:42:50,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:50,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:50,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:50,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:50,539 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-18 11:42:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:50,881 INFO L93 Difference]: Finished difference Result 229 states and 515 transitions. [2019-12-18 11:42:50,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:42:50,882 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:50,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:50,884 INFO L225 Difference]: With dead ends: 229 [2019-12-18 11:42:50,884 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 11:42:50,884 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:42:50,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 11:42:50,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 145. [2019-12-18 11:42:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:42:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 11:42:50,888 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 11:42:50,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:50,888 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 11:42:50,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 11:42:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:50,889 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:50,889 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:51,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:51,093 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:51,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:51,094 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 89 times [2019-12-18 11:42:51,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:51,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136067544] [2019-12-18 11:42:51,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:51,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136067544] [2019-12-18 11:42:51,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409545213] [2019-12-18 11:42:51,170 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:51,212 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:51,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:51,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:51,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:51,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:51,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:51,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160037010] [2019-12-18 11:42:51,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:51,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:51,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:51,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:51,296 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 11:42:51,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:51,599 INFO L93 Difference]: Finished difference Result 219 states and 501 transitions. [2019-12-18 11:42:51,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:51,599 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:51,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:51,601 INFO L225 Difference]: With dead ends: 219 [2019-12-18 11:42:51,601 INFO L226 Difference]: Without dead ends: 218 [2019-12-18 11:42:51,602 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:51,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-18 11:42:51,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 146. [2019-12-18 11:42:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-18 11:42:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 359 transitions. [2019-12-18 11:42:51,606 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 359 transitions. Word has length 13 [2019-12-18 11:42:51,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:51,607 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 359 transitions. [2019-12-18 11:42:51,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:51,607 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 359 transitions. [2019-12-18 11:42:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:51,607 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:51,608 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:51,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:51,811 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:51,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:51,812 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 90 times [2019-12-18 11:42:51,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:51,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271749322] [2019-12-18 11:42:51,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:51,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271749322] [2019-12-18 11:42:51,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269734952] [2019-12-18 11:42:51,936 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:52,004 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:52,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:52,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:52,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:52,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:52,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:52,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471393405] [2019-12-18 11:42:52,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:52,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:52,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:52,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:52,137 INFO L87 Difference]: Start difference. First operand 146 states and 359 transitions. Second operand 16 states. [2019-12-18 11:42:52,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:52,612 INFO L93 Difference]: Finished difference Result 222 states and 507 transitions. [2019-12-18 11:42:52,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:42:52,613 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:52,614 INFO L225 Difference]: With dead ends: 222 [2019-12-18 11:42:52,615 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 11:42:52,615 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=583, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 11:42:52,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 145. [2019-12-18 11:42:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:42:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 11:42:52,619 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 11:42:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:52,619 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 11:42:52,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 11:42:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:52,620 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:52,620 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:52,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:52,824 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:52,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:52,824 INFO L82 PathProgramCache]: Analyzing trace with hash -721023787, now seen corresponding path program 91 times [2019-12-18 11:42:52,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:52,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215629751] [2019-12-18 11:42:52,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:52,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215629751] [2019-12-18 11:42:52,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943316573] [2019-12-18 11:42:52,911 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:52,956 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:52,956 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:53,173 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:42:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:53,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:53,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:53,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917498856] [2019-12-18 11:42:53,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:53,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:53,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:53,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:53,174 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 11:42:53,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:53,677 INFO L93 Difference]: Finished difference Result 222 states and 501 transitions. [2019-12-18 11:42:53,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:42:53,677 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:53,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:53,678 INFO L225 Difference]: With dead ends: 222 [2019-12-18 11:42:53,683 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:42:53,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:42:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:42:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 144. [2019-12-18 11:42:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:42:53,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-18 11:42:53,687 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-18 11:42:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:53,687 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-18 11:42:53,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-18 11:42:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:53,688 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:53,688 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:53,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:53,891 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:53,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:53,891 INFO L82 PathProgramCache]: Analyzing trace with hash -721028437, now seen corresponding path program 92 times [2019-12-18 11:42:53,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:53,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334655793] [2019-12-18 11:42:53,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:53,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334655793] [2019-12-18 11:42:53,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473598286] [2019-12-18 11:42:53,990 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:54,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:54,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:54,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:54,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:54,662 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_274 Int)) (and (<= c_~j~0 (+ (* 2 v_~j~0_274) 2)) (<= (div (+ (* v_~j~0_274 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ v_~j~0_274 c_~j~0 2)))) is different from true [2019-12-18 11:42:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:54,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:54,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:54,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077195065] [2019-12-18 11:42:54,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:54,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:54,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:54,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=145, Unknown=1, NotChecked=26, Total=240 [2019-12-18 11:42:54,664 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-18 11:42:55,319 WARN L192 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2019-12-18 11:42:55,965 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2019-12-18 11:42:55,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:55,987 INFO L93 Difference]: Finished difference Result 222 states and 505 transitions. [2019-12-18 11:42:55,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:42:55,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:55,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:55,989 INFO L225 Difference]: With dead ends: 222 [2019-12-18 11:42:55,989 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:42:55,990 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=280, Invalid=535, Unknown=1, NotChecked=54, Total=870 [2019-12-18 11:42:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:42:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 142. [2019-12-18 11:42:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 11:42:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-18 11:42:55,993 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-18 11:42:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:55,993 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-18 11:42:55,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:55,993 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-18 11:42:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:55,994 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:55,994 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:56,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:56,195 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:56,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:56,195 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 93 times [2019-12-18 11:42:56,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:56,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573104067] [2019-12-18 11:42:56,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:56,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573104067] [2019-12-18 11:42:56,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099380225] [2019-12-18 11:42:56,259 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:56,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:56,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:56,299 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:56,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:56,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:56,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:56,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732518500] [2019-12-18 11:42:56,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:56,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:56,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:56,418 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 16 states. [2019-12-18 11:42:56,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:56,696 INFO L93 Difference]: Finished difference Result 163 states and 366 transitions. [2019-12-18 11:42:56,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:56,696 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:56,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:56,696 INFO L225 Difference]: With dead ends: 163 [2019-12-18 11:42:56,696 INFO L226 Difference]: Without dead ends: 153 [2019-12-18 11:42:56,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-18 11:42:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 138. [2019-12-18 11:42:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 323 transitions. [2019-12-18 11:42:56,699 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 323 transitions. Word has length 13 [2019-12-18 11:42:56,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:56,699 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 323 transitions. [2019-12-18 11:42:56,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:56,700 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 323 transitions. [2019-12-18 11:42:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:56,700 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:56,700 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:56,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:56,903 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:56,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:56,904 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-18 11:42:56,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:56,905 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976910998] [2019-12-18 11:42:56,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:56,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976910998] [2019-12-18 11:42:56,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728263436] [2019-12-18 11:42:56,992 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:57,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:42:57,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:57,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 11:42:57,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2019-12-18 11:42:57,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281146476] [2019-12-18 11:42:57,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:42:57,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:57,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:42:57,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:57,086 INFO L87 Difference]: Start difference. First operand 138 states and 323 transitions. Second operand 8 states. [2019-12-18 11:42:57,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:57,116 INFO L93 Difference]: Finished difference Result 151 states and 325 transitions. [2019-12-18 11:42:57,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:42:57,117 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-18 11:42:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:57,117 INFO L225 Difference]: With dead ends: 151 [2019-12-18 11:42:57,118 INFO L226 Difference]: Without dead ends: 137 [2019-12-18 11:42:57,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:57,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-18 11:42:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2019-12-18 11:42:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 11:42:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2019-12-18 11:42:57,120 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 13 [2019-12-18 11:42:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:57,121 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2019-12-18 11:42:57,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:42:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2019-12-18 11:42:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:57,121 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:57,122 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:57,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:57,322 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:57,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:57,323 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 94 times [2019-12-18 11:42:57,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:57,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659525984] [2019-12-18 11:42:57,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:57,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659525984] [2019-12-18 11:42:57,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73356054] [2019-12-18 11:42:57,427 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:57,471 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:57,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:57,472 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:57,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:57,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:57,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:57,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389628237] [2019-12-18 11:42:57,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:57,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:57,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:57,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:57,598 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand 18 states. [2019-12-18 11:42:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:57,800 INFO L93 Difference]: Finished difference Result 161 states and 344 transitions. [2019-12-18 11:42:57,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:42:57,801 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:57,801 INFO L225 Difference]: With dead ends: 161 [2019-12-18 11:42:57,802 INFO L226 Difference]: Without dead ends: 159 [2019-12-18 11:42:57,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-18 11:42:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 137. [2019-12-18 11:42:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 11:42:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 301 transitions. [2019-12-18 11:42:57,806 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 301 transitions. Word has length 14 [2019-12-18 11:42:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:57,806 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 301 transitions. [2019-12-18 11:42:57,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 301 transitions. [2019-12-18 11:42:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:57,806 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:57,807 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:58,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:58,008 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:58,009 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 95 times [2019-12-18 11:42:58,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:58,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858440898] [2019-12-18 11:42:58,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:58,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858440898] [2019-12-18 11:42:58,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499452787] [2019-12-18 11:42:58,085 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:58,126 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:58,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:58,127 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:58,128 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:58,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:58,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:58,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319456857] [2019-12-18 11:42:58,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:58,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:58,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:58,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:58,232 INFO L87 Difference]: Start difference. First operand 137 states and 301 transitions. Second operand 18 states. [2019-12-18 11:42:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:58,419 INFO L93 Difference]: Finished difference Result 169 states and 363 transitions. [2019-12-18 11:42:58,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:42:58,420 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:58,420 INFO L225 Difference]: With dead ends: 169 [2019-12-18 11:42:58,421 INFO L226 Difference]: Without dead ends: 168 [2019-12-18 11:42:58,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:58,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-18 11:42:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2019-12-18 11:42:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:42:58,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 312 transitions. [2019-12-18 11:42:58,424 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 312 transitions. Word has length 14 [2019-12-18 11:42:58,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:58,424 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 312 transitions. [2019-12-18 11:42:58,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:58,425 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 312 transitions. [2019-12-18 11:42:58,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:58,425 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:58,425 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:58,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:58,626 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:58,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:58,626 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 96 times [2019-12-18 11:42:58,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:58,627 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093125725] [2019-12-18 11:42:58,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:58,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093125725] [2019-12-18 11:42:58,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153412831] [2019-12-18 11:42:58,703 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:58,747 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:58,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:58,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:58,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:59,291 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:42:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:59,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:59,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:59,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166962996] [2019-12-18 11:42:59,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:59,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:59,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:59,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:59,293 INFO L87 Difference]: Start difference. First operand 140 states and 312 transitions. Second operand 18 states. [2019-12-18 11:42:59,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:59,558 INFO L93 Difference]: Finished difference Result 180 states and 385 transitions. [2019-12-18 11:42:59,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:42:59,558 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:59,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:59,559 INFO L225 Difference]: With dead ends: 180 [2019-12-18 11:42:59,559 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 11:42:59,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:59,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 11:42:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 140. [2019-12-18 11:42:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:42:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-18 11:42:59,562 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-18 11:42:59,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:59,562 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-18 11:42:59,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-18 11:42:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:59,563 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:59,563 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:59,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:59,763 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:59,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:59,764 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 97 times [2019-12-18 11:42:59,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:59,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267472002] [2019-12-18 11:42:59,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:59,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267472002] [2019-12-18 11:42:59,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982048934] [2019-12-18 11:42:59,854 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:59,894 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:59,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:00,998 WARN L192 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-18 11:43:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:01,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:01,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:01,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019002297] [2019-12-18 11:43:01,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:01,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:01,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:01,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=202, Unknown=2, NotChecked=0, Total=306 [2019-12-18 11:43:01,017 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-18 11:43:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:01,312 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2019-12-18 11:43:01,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:43:01,313 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:01,314 INFO L225 Difference]: With dead ends: 188 [2019-12-18 11:43:01,314 INFO L226 Difference]: Without dead ends: 186 [2019-12-18 11:43:01,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=221, Invalid=427, Unknown=2, NotChecked=0, Total=650 [2019-12-18 11:43:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-18 11:43:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2019-12-18 11:43:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:43:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-18 11:43:01,320 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-18 11:43:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:01,320 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-18 11:43:01,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-18 11:43:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:01,321 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:01,321 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:01,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:01,524 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:01,525 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 98 times [2019-12-18 11:43:01,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:01,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040803804] [2019-12-18 11:43:01,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:01,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040803804] [2019-12-18 11:43:01,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723959294] [2019-12-18 11:43:01,600 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:01,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:01,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:01,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:01,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:01,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:01,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:01,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658358038] [2019-12-18 11:43:01,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:01,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:01,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:01,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:01,803 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-18 11:43:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:02,015 INFO L93 Difference]: Finished difference Result 172 states and 373 transitions. [2019-12-18 11:43:02,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:43:02,016 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:02,017 INFO L225 Difference]: With dead ends: 172 [2019-12-18 11:43:02,017 INFO L226 Difference]: Without dead ends: 171 [2019-12-18 11:43:02,017 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:43:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-18 11:43:02,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 144. [2019-12-18 11:43:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:43:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-18 11:43:02,021 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-18 11:43:02,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:02,021 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-18 11:43:02,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:02,022 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-18 11:43:02,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:02,022 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:02,022 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:02,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:02,225 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:02,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:02,226 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 99 times [2019-12-18 11:43:02,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:02,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564673633] [2019-12-18 11:43:02,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:02,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564673633] [2019-12-18 11:43:02,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143631803] [2019-12-18 11:43:02,315 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:02,358 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:43:02,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:02,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:02,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:03,021 WARN L192 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:43:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:03,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:03,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:03,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942252088] [2019-12-18 11:43:03,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:03,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:03,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:03,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:03,023 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 18 states. [2019-12-18 11:43:04,416 WARN L192 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2019-12-18 11:43:04,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:04,505 INFO L93 Difference]: Finished difference Result 201 states and 432 transitions. [2019-12-18 11:43:04,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:43:04,505 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:04,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:04,506 INFO L225 Difference]: With dead ends: 201 [2019-12-18 11:43:04,506 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 11:43:04,507 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:43:04,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 11:43:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2019-12-18 11:43:04,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:43:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-18 11:43:04,510 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-18 11:43:04,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:04,511 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-18 11:43:04,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-18 11:43:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:04,511 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:04,511 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:04,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:04,715 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:04,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:04,715 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 100 times [2019-12-18 11:43:04,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:04,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683973233] [2019-12-18 11:43:04,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:04,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683973233] [2019-12-18 11:43:04,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742035717] [2019-12-18 11:43:04,811 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:04,852 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:04,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:04,853 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:04,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:05,988 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_309 Int)) (and (<= c_~j~0 (+ (* 3 v_~j~0_309) 1)) (<= c_~i~0 (+ (* 2 v_~j~0_309) c_~j~0 1)) (<= (div (+ (* v_~j~0_309 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-18 11:43:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:05,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:05,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:05,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115305948] [2019-12-18 11:43:05,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:05,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:05,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:05,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=178, Unknown=1, NotChecked=30, Total=306 [2019-12-18 11:43:05,990 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 18 states. [2019-12-18 11:43:07,506 WARN L192 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-18 11:43:08,439 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-18 11:43:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:08,497 INFO L93 Difference]: Finished difference Result 216 states and 457 transitions. [2019-12-18 11:43:08,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:43:08,497 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:08,499 INFO L225 Difference]: With dead ends: 216 [2019-12-18 11:43:08,499 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 11:43:08,499 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=259, Invalid=445, Unknown=2, NotChecked=50, Total=756 [2019-12-18 11:43:08,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 11:43:08,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2019-12-18 11:43:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:43:08,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 330 transitions. [2019-12-18 11:43:08,502 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 330 transitions. Word has length 14 [2019-12-18 11:43:08,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:08,503 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 330 transitions. [2019-12-18 11:43:08,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:08,503 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 330 transitions. [2019-12-18 11:43:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:08,503 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:08,503 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:08,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:08,704 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:08,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:08,705 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 101 times [2019-12-18 11:43:08,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:08,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669278930] [2019-12-18 11:43:08,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:08,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669278930] [2019-12-18 11:43:08,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342670503] [2019-12-18 11:43:08,784 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:08,831 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:43:08,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:08,833 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:08,833 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:09,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:09,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:09,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346011457] [2019-12-18 11:43:09,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:09,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:09,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:09,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:09,898 INFO L87 Difference]: Start difference. First operand 145 states and 330 transitions. Second operand 18 states. [2019-12-18 11:43:11,470 WARN L192 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-18 11:43:12,452 WARN L192 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 11:43:13,191 WARN L192 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-18 11:43:13,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:13,326 INFO L93 Difference]: Finished difference Result 197 states and 424 transitions. [2019-12-18 11:43:13,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:43:13,326 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:13,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:13,327 INFO L225 Difference]: With dead ends: 197 [2019-12-18 11:43:13,327 INFO L226 Difference]: Without dead ends: 193 [2019-12-18 11:43:13,328 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=320, Invalid=549, Unknown=1, NotChecked=0, Total=870 [2019-12-18 11:43:13,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-18 11:43:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2019-12-18 11:43:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:43:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-18 11:43:13,331 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-18 11:43:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:13,331 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-18 11:43:13,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-18 11:43:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:13,331 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:13,331 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:13,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:13,532 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:13,533 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 102 times [2019-12-18 11:43:13,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:13,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818168638] [2019-12-18 11:43:13,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:13,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818168638] [2019-12-18 11:43:13,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580038147] [2019-12-18 11:43:13,607 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:13,649 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:43:13,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:13,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:13,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:14,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:14,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:14,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667413295] [2019-12-18 11:43:14,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:14,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:14,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:14,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=207, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:43:14,169 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 18 states. [2019-12-18 11:43:14,759 WARN L192 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 11:43:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:14,995 INFO L93 Difference]: Finished difference Result 205 states and 440 transitions. [2019-12-18 11:43:14,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:43:14,995 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:14,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:14,996 INFO L225 Difference]: With dead ends: 205 [2019-12-18 11:43:14,996 INFO L226 Difference]: Without dead ends: 204 [2019-12-18 11:43:14,997 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=263, Invalid=492, Unknown=1, NotChecked=0, Total=756 [2019-12-18 11:43:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-18 11:43:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 146. [2019-12-18 11:43:15,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-18 11:43:15,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 332 transitions. [2019-12-18 11:43:15,001 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 332 transitions. Word has length 14 [2019-12-18 11:43:15,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:15,001 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 332 transitions. [2019-12-18 11:43:15,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:15,001 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 332 transitions. [2019-12-18 11:43:15,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:15,001 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:15,002 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:15,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:15,202 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 103 times [2019-12-18 11:43:15,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:15,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388905584] [2019-12-18 11:43:15,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:15,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388905584] [2019-12-18 11:43:15,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934304002] [2019-12-18 11:43:15,303 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:15,346 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:15,347 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:16,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:16,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:16,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335605328] [2019-12-18 11:43:16,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:16,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:16,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:16,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:16,330 INFO L87 Difference]: Start difference. First operand 146 states and 332 transitions. Second operand 18 states. [2019-12-18 11:43:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:16,695 INFO L93 Difference]: Finished difference Result 228 states and 488 transitions. [2019-12-18 11:43:16,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:43:16,699 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:16,700 INFO L225 Difference]: With dead ends: 228 [2019-12-18 11:43:16,700 INFO L226 Difference]: Without dead ends: 225 [2019-12-18 11:43:16,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=278, Invalid=478, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:43:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-12-18 11:43:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 145. [2019-12-18 11:43:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:43:16,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 328 transitions. [2019-12-18 11:43:16,703 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 328 transitions. Word has length 14 [2019-12-18 11:43:16,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:16,704 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 328 transitions. [2019-12-18 11:43:16,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:16,704 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 328 transitions. [2019-12-18 11:43:16,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:16,704 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:16,704 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:16,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:16,905 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:16,905 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 104 times [2019-12-18 11:43:16,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:16,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697565874] [2019-12-18 11:43:16,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:16,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697565874] [2019-12-18 11:43:16,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080114226] [2019-12-18 11:43:16,988 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:17,029 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:17,030 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:17,030 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:17,031 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:18,215 WARN L192 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:43:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:18,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:18,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:18,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950553621] [2019-12-18 11:43:18,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:18,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:18,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:18,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:18,240 INFO L87 Difference]: Start difference. First operand 145 states and 328 transitions. Second operand 18 states. [2019-12-18 11:43:20,593 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-18 11:43:20,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:20,677 INFO L93 Difference]: Finished difference Result 192 states and 415 transitions. [2019-12-18 11:43:20,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:43:20,677 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:20,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:20,678 INFO L225 Difference]: With dead ends: 192 [2019-12-18 11:43:20,678 INFO L226 Difference]: Without dead ends: 190 [2019-12-18 11:43:20,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=249, Invalid=453, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:43:20,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-18 11:43:20,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 144. [2019-12-18 11:43:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:43:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-18 11:43:20,682 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-18 11:43:20,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:20,682 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-18 11:43:20,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-18 11:43:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:20,683 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:20,683 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:20,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:20,884 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:20,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091347, now seen corresponding path program 105 times [2019-12-18 11:43:20,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:20,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747130669] [2019-12-18 11:43:20,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:20,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747130669] [2019-12-18 11:43:20,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336422197] [2019-12-18 11:43:20,973 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:21,013 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:43:21,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:21,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:21,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:21,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:21,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:21,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672491548] [2019-12-18 11:43:21,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:21,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:21,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:21,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:21,121 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 18 states. [2019-12-18 11:43:21,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:21,320 INFO L93 Difference]: Finished difference Result 170 states and 372 transitions. [2019-12-18 11:43:21,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:43:21,321 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:21,322 INFO L225 Difference]: With dead ends: 170 [2019-12-18 11:43:21,322 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 11:43:21,322 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:43:21,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 11:43:21,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2019-12-18 11:43:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 11:43:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 11:43:21,325 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 11:43:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:21,326 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 11:43:21,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 11:43:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:21,326 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:21,326 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:21,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:21,527 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:21,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091192, now seen corresponding path program 106 times [2019-12-18 11:43:21,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:21,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502116487] [2019-12-18 11:43:21,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:21,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502116487] [2019-12-18 11:43:21,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313830860] [2019-12-18 11:43:21,609 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:21,653 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:21,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:21,653 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:21,654 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:21,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:21,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:21,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080181707] [2019-12-18 11:43:21,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:21,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:21,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:21,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:21,787 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 11:43:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:22,124 INFO L93 Difference]: Finished difference Result 197 states and 428 transitions. [2019-12-18 11:43:22,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:43:22,125 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:22,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:22,125 INFO L225 Difference]: With dead ends: 197 [2019-12-18 11:43:22,126 INFO L226 Difference]: Without dead ends: 196 [2019-12-18 11:43:22,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=498, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:43:22,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-18 11:43:22,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 149. [2019-12-18 11:43:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 11:43:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 11:43:22,129 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 11:43:22,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:22,129 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 11:43:22,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:22,129 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 11:43:22,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:22,130 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:22,130 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:22,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:22,331 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:22,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:22,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 107 times [2019-12-18 11:43:22,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:22,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004819641] [2019-12-18 11:43:22,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:22,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004819641] [2019-12-18 11:43:22,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818819872] [2019-12-18 11:43:22,419 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:22,462 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:43:22,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:22,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:22,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:22,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:22,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:22,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084543189] [2019-12-18 11:43:22,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:22,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:22,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:22,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:22,587 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 11:43:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:23,031 INFO L93 Difference]: Finished difference Result 232 states and 498 transitions. [2019-12-18 11:43:23,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:43:23,031 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:23,032 INFO L225 Difference]: With dead ends: 232 [2019-12-18 11:43:23,033 INFO L226 Difference]: Without dead ends: 231 [2019-12-18 11:43:23,033 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=540, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:43:23,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-18 11:43:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 150. [2019-12-18 11:43:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 11:43:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 340 transitions. [2019-12-18 11:43:23,037 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 340 transitions. Word has length 14 [2019-12-18 11:43:23,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:23,037 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 340 transitions. [2019-12-18 11:43:23,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 340 transitions. [2019-12-18 11:43:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:23,038 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:23,038 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:23,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:23,241 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:23,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 108 times [2019-12-18 11:43:23,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:23,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11408172] [2019-12-18 11:43:23,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:23,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11408172] [2019-12-18 11:43:23,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274258852] [2019-12-18 11:43:23,324 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:23,366 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:43:23,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:23,367 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:23,368 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:23,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:23,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:23,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299418905] [2019-12-18 11:43:23,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:23,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:23,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:23,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:23,527 INFO L87 Difference]: Start difference. First operand 150 states and 340 transitions. Second operand 18 states. [2019-12-18 11:43:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:24,030 INFO L93 Difference]: Finished difference Result 212 states and 456 transitions. [2019-12-18 11:43:24,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:43:24,031 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:24,032 INFO L225 Difference]: With dead ends: 212 [2019-12-18 11:43:24,032 INFO L226 Difference]: Without dead ends: 211 [2019-12-18 11:43:24,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:43:24,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-18 11:43:24,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2019-12-18 11:43:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 11:43:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 11:43:24,034 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 11:43:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:24,034 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 11:43:24,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 11:43:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:24,035 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:24,035 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:24,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:24,236 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:24,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:24,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 109 times [2019-12-18 11:43:24,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:24,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635617473] [2019-12-18 11:43:24,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:24,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635617473] [2019-12-18 11:43:24,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217334220] [2019-12-18 11:43:24,335 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:24,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:24,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:24,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:24,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:24,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265660528] [2019-12-18 11:43:24,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:24,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:24,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:24,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:24,548 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 11:43:25,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:25,047 INFO L93 Difference]: Finished difference Result 220 states and 470 transitions. [2019-12-18 11:43:25,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:43:25,048 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:25,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:25,048 INFO L225 Difference]: With dead ends: 220 [2019-12-18 11:43:25,049 INFO L226 Difference]: Without dead ends: 219 [2019-12-18 11:43:25,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:43:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-18 11:43:25,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 151. [2019-12-18 11:43:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-18 11:43:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 344 transitions. [2019-12-18 11:43:25,053 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 344 transitions. Word has length 14 [2019-12-18 11:43:25,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:25,053 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 344 transitions. [2019-12-18 11:43:25,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 344 transitions. [2019-12-18 11:43:25,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:25,053 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:25,053 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:25,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:25,254 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:25,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:25,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 110 times [2019-12-18 11:43:25,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:25,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131840267] [2019-12-18 11:43:25,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:25,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131840267] [2019-12-18 11:43:25,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798178378] [2019-12-18 11:43:25,361 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:25,405 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:25,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:25,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:25,407 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:25,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:25,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:25,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509801850] [2019-12-18 11:43:25,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:25,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:25,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:25,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:25,583 INFO L87 Difference]: Start difference. First operand 151 states and 344 transitions. Second operand 18 states. [2019-12-18 11:43:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:26,484 INFO L93 Difference]: Finished difference Result 252 states and 542 transitions. [2019-12-18 11:43:26,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:43:26,484 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:26,485 INFO L225 Difference]: With dead ends: 252 [2019-12-18 11:43:26,485 INFO L226 Difference]: Without dead ends: 245 [2019-12-18 11:43:26,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:43:26,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-12-18 11:43:26,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 153. [2019-12-18 11:43:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 11:43:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 347 transitions. [2019-12-18 11:43:26,488 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 347 transitions. Word has length 14 [2019-12-18 11:43:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:26,488 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 347 transitions. [2019-12-18 11:43:26,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 347 transitions. [2019-12-18 11:43:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:26,489 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:26,489 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:26,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:26,690 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:26,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:26,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 111 times [2019-12-18 11:43:26,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:26,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760919433] [2019-12-18 11:43:26,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:26,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760919433] [2019-12-18 11:43:26,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076381511] [2019-12-18 11:43:26,767 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:26,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:43:26,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:26,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:26,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:26,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:26,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:26,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410309945] [2019-12-18 11:43:26,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:26,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:26,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:26,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:26,989 INFO L87 Difference]: Start difference. First operand 153 states and 347 transitions. Second operand 18 states. [2019-12-18 11:43:31,237 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 11:43:35,549 WARN L192 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2019-12-18 11:43:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:36,709 INFO L93 Difference]: Finished difference Result 246 states and 529 transitions. [2019-12-18 11:43:36,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:43:36,709 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:36,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:36,710 INFO L225 Difference]: With dead ends: 246 [2019-12-18 11:43:36,710 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 11:43:36,710 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=338, Invalid=654, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:43:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 11:43:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 152. [2019-12-18 11:43:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:43:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 344 transitions. [2019-12-18 11:43:36,713 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 344 transitions. Word has length 14 [2019-12-18 11:43:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:36,714 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 344 transitions. [2019-12-18 11:43:36,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 344 transitions. [2019-12-18 11:43:36,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:36,714 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:36,714 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:36,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:36,915 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:36,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 112 times [2019-12-18 11:43:36,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:36,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403907217] [2019-12-18 11:43:36,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:36,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403907217] [2019-12-18 11:43:36,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979937421] [2019-12-18 11:43:36,999 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:37,042 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:37,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:37,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:37,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:37,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:37,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:37,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235155227] [2019-12-18 11:43:37,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:37,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:37,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:37,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:37,183 INFO L87 Difference]: Start difference. First operand 152 states and 344 transitions. Second operand 18 states. [2019-12-18 11:43:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:38,231 INFO L93 Difference]: Finished difference Result 208 states and 450 transitions. [2019-12-18 11:43:38,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:43:38,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:38,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:38,232 INFO L225 Difference]: With dead ends: 208 [2019-12-18 11:43:38,233 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 11:43:38,233 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:43:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 11:43:38,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 154. [2019-12-18 11:43:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:43:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 352 transitions. [2019-12-18 11:43:38,237 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 352 transitions. Word has length 14 [2019-12-18 11:43:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:38,237 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 352 transitions. [2019-12-18 11:43:38,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 352 transitions. [2019-12-18 11:43:38,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:38,238 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:38,238 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:38,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:38,438 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:38,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:38,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 113 times [2019-12-18 11:43:38,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:38,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833929251] [2019-12-18 11:43:38,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:38,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833929251] [2019-12-18 11:43:38,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978844924] [2019-12-18 11:43:38,521 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:38,564 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:43:38,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:38,566 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:38,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:50,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:50,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:50,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669836541] [2019-12-18 11:43:50,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:50,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:50,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:50,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=205, Unknown=2, NotChecked=0, Total=306 [2019-12-18 11:43:50,992 INFO L87 Difference]: Start difference. First operand 154 states and 352 transitions. Second operand 18 states. [2019-12-18 11:44:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:02,048 INFO L93 Difference]: Finished difference Result 238 states and 518 transitions. [2019-12-18 11:44:02,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:44:02,048 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:02,049 INFO L225 Difference]: With dead ends: 238 [2019-12-18 11:44:02,049 INFO L226 Difference]: Without dead ends: 237 [2019-12-18 11:44:02,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=286, Invalid=522, Unknown=4, NotChecked=0, Total=812 [2019-12-18 11:44:02,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-18 11:44:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 153. [2019-12-18 11:44:02,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 11:44:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 348 transitions. [2019-12-18 11:44:02,052 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 348 transitions. Word has length 14 [2019-12-18 11:44:02,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:02,052 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 348 transitions. [2019-12-18 11:44:02,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 348 transitions. [2019-12-18 11:44:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:02,053 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:02,053 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:02,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:02,256 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:02,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 114 times [2019-12-18 11:44:02,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:02,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535905824] [2019-12-18 11:44:02,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:02,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535905824] [2019-12-18 11:44:02,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255785685] [2019-12-18 11:44:02,342 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:02,384 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:44:02,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:02,385 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:02,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:02,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:02,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:02,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620398191] [2019-12-18 11:44:02,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:02,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:02,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:02,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:02,553 INFO L87 Difference]: Start difference. First operand 153 states and 348 transitions. Second operand 18 states. [2019-12-18 11:44:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:02,994 INFO L93 Difference]: Finished difference Result 244 states and 529 transitions. [2019-12-18 11:44:02,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:44:02,994 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:02,995 INFO L225 Difference]: With dead ends: 244 [2019-12-18 11:44:02,996 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 11:44:02,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=528, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:44:02,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 11:44:02,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 154. [2019-12-18 11:44:02,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:44:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 352 transitions. [2019-12-18 11:44:03,000 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 352 transitions. Word has length 14 [2019-12-18 11:44:03,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:03,000 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 352 transitions. [2019-12-18 11:44:03,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:03,000 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 352 transitions. [2019-12-18 11:44:03,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:03,001 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:03,001 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:03,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:03,205 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:03,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 115 times [2019-12-18 11:44:03,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:03,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860494951] [2019-12-18 11:44:03,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:03,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860494951] [2019-12-18 11:44:03,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221484800] [2019-12-18 11:44:03,322 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:03,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:03,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:03,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:03,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:03,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541669904] [2019-12-18 11:44:03,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:03,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:03,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:03,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:03,731 INFO L87 Difference]: Start difference. First operand 154 states and 352 transitions. Second operand 18 states. [2019-12-18 11:44:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:04,318 INFO L93 Difference]: Finished difference Result 234 states and 505 transitions. [2019-12-18 11:44:04,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:04,319 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:04,320 INFO L225 Difference]: With dead ends: 234 [2019-12-18 11:44:04,320 INFO L226 Difference]: Without dead ends: 230 [2019-12-18 11:44:04,320 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=338, Invalid=592, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:04,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-18 11:44:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 152. [2019-12-18 11:44:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:44:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 344 transitions. [2019-12-18 11:44:04,324 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 344 transitions. Word has length 14 [2019-12-18 11:44:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:04,324 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 344 transitions. [2019-12-18 11:44:04,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:04,325 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 344 transitions. [2019-12-18 11:44:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:04,325 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:04,325 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:04,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:04,528 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:04,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:04,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 116 times [2019-12-18 11:44:04,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:04,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252201388] [2019-12-18 11:44:04,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:04,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252201388] [2019-12-18 11:44:04,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095899491] [2019-12-18 11:44:04,611 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:04,659 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:04,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:04,660 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:04,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:04,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:04,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:04,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693850391] [2019-12-18 11:44:04,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:04,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:04,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:04,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:04,904 INFO L87 Difference]: Start difference. First operand 152 states and 344 transitions. Second operand 18 states. [2019-12-18 11:44:07,678 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 11:44:07,853 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2019-12-18 11:44:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:10,372 INFO L93 Difference]: Finished difference Result 211 states and 458 transitions. [2019-12-18 11:44:10,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:44:10,372 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:10,373 INFO L225 Difference]: With dead ends: 211 [2019-12-18 11:44:10,373 INFO L226 Difference]: Without dead ends: 210 [2019-12-18 11:44:10,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=289, Invalid=580, Unknown=1, NotChecked=0, Total=870 [2019-12-18 11:44:10,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-18 11:44:10,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 149. [2019-12-18 11:44:10,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 11:44:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2019-12-18 11:44:10,377 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 14 [2019-12-18 11:44:10,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:10,377 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2019-12-18 11:44:10,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2019-12-18 11:44:10,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:10,377 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:10,377 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:10,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:10,578 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:10,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:10,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 117 times [2019-12-18 11:44:10,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:10,579 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30168124] [2019-12-18 11:44:10,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:10,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30168124] [2019-12-18 11:44:10,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294557184] [2019-12-18 11:44:10,673 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:10,722 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:44:10,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:10,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:10,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:10,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:10,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:10,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405074782] [2019-12-18 11:44:10,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:10,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:10,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:10,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:10,837 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand 18 states. [2019-12-18 11:44:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:11,266 INFO L93 Difference]: Finished difference Result 197 states and 429 transitions. [2019-12-18 11:44:11,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:11,267 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:11,267 INFO L225 Difference]: With dead ends: 197 [2019-12-18 11:44:11,268 INFO L226 Difference]: Without dead ends: 195 [2019-12-18 11:44:11,268 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=304, Invalid=626, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-18 11:44:11,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 154. [2019-12-18 11:44:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:44:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-18 11:44:11,271 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-18 11:44:11,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:11,271 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-18 11:44:11,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-18 11:44:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:11,271 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:11,271 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:11,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:11,472 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1460022991, now seen corresponding path program 118 times [2019-12-18 11:44:11,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:11,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931813601] [2019-12-18 11:44:11,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:11,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931813601] [2019-12-18 11:44:11,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324583217] [2019-12-18 11:44:11,567 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:11,615 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:44:11,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:11,616 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:11,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:11,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:11,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:11,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647342303] [2019-12-18 11:44:11,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:11,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:11,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:11,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:11,744 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-18 11:44:12,398 WARN L192 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 11:44:12,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:12,603 INFO L93 Difference]: Finished difference Result 212 states and 459 transitions. [2019-12-18 11:44:12,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:12,604 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:12,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:12,605 INFO L225 Difference]: With dead ends: 212 [2019-12-18 11:44:12,605 INFO L226 Difference]: Without dead ends: 209 [2019-12-18 11:44:12,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:44:12,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-18 11:44:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 155. [2019-12-18 11:44:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 11:44:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 351 transitions. [2019-12-18 11:44:12,609 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 351 transitions. Word has length 14 [2019-12-18 11:44:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:12,609 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 351 transitions. [2019-12-18 11:44:12,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:12,609 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 351 transitions. [2019-12-18 11:44:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:12,609 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:12,609 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:12,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:12,810 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:12,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:12,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1460023146, now seen corresponding path program 119 times [2019-12-18 11:44:12,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:12,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138227565] [2019-12-18 11:44:12,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:12,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138227565] [2019-12-18 11:44:12,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797157533] [2019-12-18 11:44:12,898 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:12,944 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:44:12,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:12,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:12,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:13,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:13,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:13,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61456832] [2019-12-18 11:44:13,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:13,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:13,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:13,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:13,059 INFO L87 Difference]: Start difference. First operand 155 states and 351 transitions. Second operand 18 states. [2019-12-18 11:44:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:13,446 INFO L93 Difference]: Finished difference Result 210 states and 457 transitions. [2019-12-18 11:44:13,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:13,446 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:13,447 INFO L225 Difference]: With dead ends: 210 [2019-12-18 11:44:13,447 INFO L226 Difference]: Without dead ends: 209 [2019-12-18 11:44:13,448 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=621, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-18 11:44:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 154. [2019-12-18 11:44:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:44:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-18 11:44:13,451 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-18 11:44:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:13,452 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-18 11:44:13,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:13,452 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-18 11:44:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:13,452 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:13,452 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:13,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:13,653 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:13,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:13,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167141, now seen corresponding path program 120 times [2019-12-18 11:44:13,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:13,654 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191806662] [2019-12-18 11:44:13,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:13,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191806662] [2019-12-18 11:44:13,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085836801] [2019-12-18 11:44:13,741 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:13,785 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:44:13,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:13,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:13,787 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:13,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:13,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:13,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571131379] [2019-12-18 11:44:13,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:13,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:13,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:13,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:13,911 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-18 11:44:14,485 WARN L192 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2019-12-18 11:44:15,413 WARN L192 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:44:16,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:16,915 INFO L93 Difference]: Finished difference Result 224 states and 482 transitions. [2019-12-18 11:44:16,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:16,915 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:16,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:16,916 INFO L225 Difference]: With dead ends: 224 [2019-12-18 11:44:16,916 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 11:44:16,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:44:16,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 11:44:16,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2019-12-18 11:44:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:44:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 354 transitions. [2019-12-18 11:44:16,920 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 354 transitions. Word has length 14 [2019-12-18 11:44:16,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:16,921 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 354 transitions. [2019-12-18 11:44:16,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 354 transitions. [2019-12-18 11:44:16,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:16,921 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:16,922 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:17,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:17,124 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:17,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167296, now seen corresponding path program 121 times [2019-12-18 11:44:17,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:17,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933649894] [2019-12-18 11:44:17,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:17,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933649894] [2019-12-18 11:44:17,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850447802] [2019-12-18 11:44:17,207 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:17,251 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:17,252 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:18,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:18,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:18,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572559569] [2019-12-18 11:44:18,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:18,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:18,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:18,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:18,748 INFO L87 Difference]: Start difference. First operand 156 states and 354 transitions. Second operand 18 states. [2019-12-18 11:44:19,979 WARN L192 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:44:21,554 WARN L192 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:44:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:22,097 INFO L93 Difference]: Finished difference Result 254 states and 544 transitions. [2019-12-18 11:44:22,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:22,098 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:22,099 INFO L225 Difference]: With dead ends: 254 [2019-12-18 11:44:22,099 INFO L226 Difference]: Without dead ends: 252 [2019-12-18 11:44:22,099 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=287, Invalid=582, Unknown=1, NotChecked=0, Total=870 [2019-12-18 11:44:22,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-18 11:44:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 156. [2019-12-18 11:44:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:44:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 355 transitions. [2019-12-18 11:44:22,103 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 355 transitions. Word has length 14 [2019-12-18 11:44:22,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:22,103 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 355 transitions. [2019-12-18 11:44:22,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 355 transitions. [2019-12-18 11:44:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:22,103 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:22,104 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:22,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:22,304 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1460171946, now seen corresponding path program 122 times [2019-12-18 11:44:22,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:22,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126507163] [2019-12-18 11:44:22,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:22,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126507163] [2019-12-18 11:44:22,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888278659] [2019-12-18 11:44:22,394 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:22,438 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:22,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:22,439 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:22,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:22,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:22,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:22,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140956142] [2019-12-18 11:44:22,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:22,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:22,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:22,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:22,560 INFO L87 Difference]: Start difference. First operand 156 states and 355 transitions. Second operand 18 states. [2019-12-18 11:44:23,044 WARN L192 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2019-12-18 11:44:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:25,092 INFO L93 Difference]: Finished difference Result 237 states and 511 transitions. [2019-12-18 11:44:25,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:25,093 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:25,094 INFO L225 Difference]: With dead ends: 237 [2019-12-18 11:44:25,094 INFO L226 Difference]: Without dead ends: 236 [2019-12-18 11:44:25,094 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=333, Invalid=657, Unknown=2, NotChecked=0, Total=992 [2019-12-18 11:44:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-18 11:44:25,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 154. [2019-12-18 11:44:25,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:44:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-18 11:44:25,098 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-18 11:44:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:25,098 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-18 11:44:25,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-18 11:44:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:25,098 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:25,099 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:25,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:25,299 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:25,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 123 times [2019-12-18 11:44:25,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:25,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538603211] [2019-12-18 11:44:25,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:25,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538603211] [2019-12-18 11:44:25,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833498459] [2019-12-18 11:44:25,374 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:25,416 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:44:25,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:25,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 11:44:25,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:25,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:25,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:25,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093004518] [2019-12-18 11:44:25,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:25,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:25,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:25,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:25,520 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-18 11:44:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:26,295 INFO L93 Difference]: Finished difference Result 240 states and 512 transitions. [2019-12-18 11:44:26,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 11:44:26,295 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:26,296 INFO L225 Difference]: With dead ends: 240 [2019-12-18 11:44:26,296 INFO L226 Difference]: Without dead ends: 230 [2019-12-18 11:44:26,297 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 11:44:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-18 11:44:26,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 158. [2019-12-18 11:44:26,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 11:44:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 360 transitions. [2019-12-18 11:44:26,301 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 360 transitions. Word has length 14 [2019-12-18 11:44:26,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:26,301 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 360 transitions. [2019-12-18 11:44:26,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:26,301 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 360 transitions. [2019-12-18 11:44:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:26,301 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:26,301 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:26,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:26,502 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:26,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 124 times [2019-12-18 11:44:26,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:26,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352483238] [2019-12-18 11:44:26,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:26,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352483238] [2019-12-18 11:44:26,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886178256] [2019-12-18 11:44:26,584 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:26,631 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:44:26,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:26,632 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:26,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:27,114 WARN L192 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-18 11:44:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:29,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:29,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:29,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925196939] [2019-12-18 11:44:29,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:29,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:29,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:29,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:29,681 INFO L87 Difference]: Start difference. First operand 158 states and 360 transitions. Second operand 18 states. [2019-12-18 11:44:29,887 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-12-18 11:44:36,386 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-18 11:44:39,498 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 11:44:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:39,905 INFO L93 Difference]: Finished difference Result 245 states and 532 transitions. [2019-12-18 11:44:39,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:44:39,905 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:39,907 INFO L225 Difference]: With dead ends: 245 [2019-12-18 11:44:39,907 INFO L226 Difference]: Without dead ends: 244 [2019-12-18 11:44:39,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=328, Invalid=663, Unknown=1, NotChecked=0, Total=992 [2019-12-18 11:44:39,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-12-18 11:44:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2019-12-18 11:44:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-18 11:44:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 366 transitions. [2019-12-18 11:44:39,911 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 366 transitions. Word has length 14 [2019-12-18 11:44:39,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:39,911 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 366 transitions. [2019-12-18 11:44:39,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 366 transitions. [2019-12-18 11:44:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:39,912 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:39,912 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:40,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:40,113 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:40,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:40,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 125 times [2019-12-18 11:44:40,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:40,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142030602] [2019-12-18 11:44:40,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:40,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142030602] [2019-12-18 11:44:40,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520929065] [2019-12-18 11:44:40,200 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:40,245 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:44:40,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:40,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:40,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:40,625 WARN L192 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-18 11:44:41,087 WARN L192 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:44:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:41,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:41,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:41,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398360903] [2019-12-18 11:44:41,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:41,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:41,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:41,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:41,112 INFO L87 Difference]: Start difference. First operand 160 states and 366 transitions. Second operand 18 states. [2019-12-18 11:44:41,621 WARN L192 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-18 11:44:41,853 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-18 11:44:42,499 WARN L192 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 11:44:43,634 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-12-18 11:44:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:43,724 INFO L93 Difference]: Finished difference Result 274 states and 600 transitions. [2019-12-18 11:44:43,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:44:43,725 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:43,726 INFO L225 Difference]: With dead ends: 274 [2019-12-18 11:44:43,726 INFO L226 Difference]: Without dead ends: 272 [2019-12-18 11:44:43,727 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:44:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-12-18 11:44:43,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 167. [2019-12-18 11:44:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-12-18 11:44:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 392 transitions. [2019-12-18 11:44:43,731 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 392 transitions. Word has length 14 [2019-12-18 11:44:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:43,732 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 392 transitions. [2019-12-18 11:44:43,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:43,732 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 392 transitions. [2019-12-18 11:44:43,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:43,732 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:43,733 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:43,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:43,936 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:43,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 126 times [2019-12-18 11:44:43,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:43,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467651605] [2019-12-18 11:44:43,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:44,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467651605] [2019-12-18 11:44:44,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123732707] [2019-12-18 11:44:44,017 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:44,060 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:44:44,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:44,061 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:44,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:44,738 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:44:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:45,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:45,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:45,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035381638] [2019-12-18 11:44:45,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:45,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:45,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:45,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=212, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:44:45,163 INFO L87 Difference]: Start difference. First operand 167 states and 392 transitions. Second operand 18 states. [2019-12-18 11:44:47,204 WARN L192 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 11:44:47,888 WARN L192 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 11:44:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:48,425 INFO L93 Difference]: Finished difference Result 265 states and 579 transitions. [2019-12-18 11:44:48,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:44:48,425 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:48,426 INFO L225 Difference]: With dead ends: 265 [2019-12-18 11:44:48,426 INFO L226 Difference]: Without dead ends: 256 [2019-12-18 11:44:48,427 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=375, Invalid=746, Unknown=1, NotChecked=0, Total=1122 [2019-12-18 11:44:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-18 11:44:48,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 165. [2019-12-18 11:44:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-18 11:44:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 382 transitions. [2019-12-18 11:44:48,431 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 382 transitions. Word has length 14 [2019-12-18 11:44:48,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:48,431 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 382 transitions. [2019-12-18 11:44:48,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 382 transitions. [2019-12-18 11:44:48,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:48,431 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:48,431 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:48,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:48,632 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:48,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 127 times [2019-12-18 11:44:48,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:48,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623388994] [2019-12-18 11:44:48,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:48,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623388994] [2019-12-18 11:44:48,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559670898] [2019-12-18 11:44:48,737 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:48,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:48,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:48,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:48,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:48,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168104225] [2019-12-18 11:44:48,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:48,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:48,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:48,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:48,900 INFO L87 Difference]: Start difference. First operand 165 states and 382 transitions. Second operand 18 states. [2019-12-18 11:44:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:51,290 INFO L93 Difference]: Finished difference Result 251 states and 549 transitions. [2019-12-18 11:44:51,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:44:51,291 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:51,291 INFO L225 Difference]: With dead ends: 251 [2019-12-18 11:44:51,291 INFO L226 Difference]: Without dead ends: 249 [2019-12-18 11:44:51,291 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=369, Invalid=752, Unknown=1, NotChecked=0, Total=1122 [2019-12-18 11:44:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-18 11:44:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 167. [2019-12-18 11:44:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-12-18 11:44:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 389 transitions. [2019-12-18 11:44:51,295 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 389 transitions. Word has length 14 [2019-12-18 11:44:51,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:51,295 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 389 transitions. [2019-12-18 11:44:51,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:51,295 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 389 transitions. [2019-12-18 11:44:51,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:51,295 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:51,296 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:51,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:51,499 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 128 times [2019-12-18 11:44:51,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:51,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939849619] [2019-12-18 11:44:51,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:51,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939849619] [2019-12-18 11:44:51,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720507927] [2019-12-18 11:44:51,579 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:51,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:51,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:51,626 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:51,627 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:51,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:51,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:51,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053562835] [2019-12-18 11:44:51,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:51,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:51,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:51,780 INFO L87 Difference]: Start difference. First operand 167 states and 389 transitions. Second operand 18 states. [2019-12-18 11:44:52,075 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-12-18 11:44:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:52,897 INFO L93 Difference]: Finished difference Result 261 states and 570 transitions. [2019-12-18 11:44:52,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:44:52,898 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:52,899 INFO L225 Difference]: With dead ends: 261 [2019-12-18 11:44:52,899 INFO L226 Difference]: Without dead ends: 257 [2019-12-18 11:44:52,899 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=784, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 11:44:52,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-12-18 11:44:52,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 165. [2019-12-18 11:44:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-18 11:44:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 383 transitions. [2019-12-18 11:44:52,902 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 383 transitions. Word has length 14 [2019-12-18 11:44:52,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:52,903 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 383 transitions. [2019-12-18 11:44:52,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 383 transitions. [2019-12-18 11:44:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:52,903 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:52,903 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:53,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:53,104 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:53,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 129 times [2019-12-18 11:44:53,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:53,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470071927] [2019-12-18 11:44:53,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:53,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470071927] [2019-12-18 11:44:53,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161951171] [2019-12-18 11:44:53,185 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:53,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:44:53,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:53,229 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:53,230 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:53,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:53,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:53,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807613012] [2019-12-18 11:44:53,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:53,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:53,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:53,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:53,317 INFO L87 Difference]: Start difference. First operand 165 states and 383 transitions. Second operand 18 states. [2019-12-18 11:44:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:53,673 INFO L93 Difference]: Finished difference Result 204 states and 448 transitions. [2019-12-18 11:44:53,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:53,674 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:53,675 INFO L225 Difference]: With dead ends: 204 [2019-12-18 11:44:53,675 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 11:44:53,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:44:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 11:44:53,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 165. [2019-12-18 11:44:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-18 11:44:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 380 transitions. [2019-12-18 11:44:53,678 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 380 transitions. Word has length 14 [2019-12-18 11:44:53,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:53,679 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 380 transitions. [2019-12-18 11:44:53,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:53,679 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 380 transitions. [2019-12-18 11:44:53,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:53,679 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:53,679 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:53,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:53,882 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:53,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:53,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 130 times [2019-12-18 11:44:53,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:53,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476433928] [2019-12-18 11:44:53,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:53,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476433928] [2019-12-18 11:44:53,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977246742] [2019-12-18 11:44:53,960 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:54,000 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:44:54,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:54,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:54,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:54,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:54,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:54,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498851578] [2019-12-18 11:44:54,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:54,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:54,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:54,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:54,098 INFO L87 Difference]: Start difference. First operand 165 states and 380 transitions. Second operand 18 states. [2019-12-18 11:44:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:54,530 INFO L93 Difference]: Finished difference Result 246 states and 535 transitions. [2019-12-18 11:44:54,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:44:54,531 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:54,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:54,532 INFO L225 Difference]: With dead ends: 246 [2019-12-18 11:44:54,532 INFO L226 Difference]: Without dead ends: 245 [2019-12-18 11:44:54,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=728, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:44:54,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-12-18 11:44:54,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 165. [2019-12-18 11:44:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-18 11:44:54,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 380 transitions. [2019-12-18 11:44:54,536 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 380 transitions. Word has length 14 [2019-12-18 11:44:54,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:54,536 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 380 transitions. [2019-12-18 11:44:54,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:54,537 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 380 transitions. [2019-12-18 11:44:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:54,537 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:54,537 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:54,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:54,738 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:54,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:54,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 131 times [2019-12-18 11:44:54,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:54,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383512192] [2019-12-18 11:44:54,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:54,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383512192] [2019-12-18 11:44:54,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826591150] [2019-12-18 11:44:54,829 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:54,871 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:44:54,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:54,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:54,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:54,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:54,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:54,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590799089] [2019-12-18 11:44:54,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:54,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:54,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:54,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:54,982 INFO L87 Difference]: Start difference. First operand 165 states and 380 transitions. Second operand 18 states. [2019-12-18 11:44:55,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:55,459 INFO L93 Difference]: Finished difference Result 256 states and 563 transitions. [2019-12-18 11:44:55,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:44:55,460 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:55,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:55,461 INFO L225 Difference]: With dead ends: 256 [2019-12-18 11:44:55,461 INFO L226 Difference]: Without dead ends: 250 [2019-12-18 11:44:55,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=709, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:44:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-12-18 11:44:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2019-12-18 11:44:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-12-18 11:44:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 382 transitions. [2019-12-18 11:44:55,467 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 382 transitions. Word has length 14 [2019-12-18 11:44:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:55,467 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 382 transitions. [2019-12-18 11:44:55,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 382 transitions. [2019-12-18 11:44:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:55,468 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:55,468 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:55,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:55,671 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:55,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 132 times [2019-12-18 11:44:55,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:55,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473503035] [2019-12-18 11:44:55,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:55,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473503035] [2019-12-18 11:44:55,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060472893] [2019-12-18 11:44:55,756 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:55,798 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:44:55,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:55,799 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:55,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:55,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:55,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:55,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024808677] [2019-12-18 11:44:55,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:55,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:55,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:55,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:55,891 INFO L87 Difference]: Start difference. First operand 166 states and 382 transitions. Second operand 18 states. [2019-12-18 11:44:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:56,297 INFO L93 Difference]: Finished difference Result 257 states and 559 transitions. [2019-12-18 11:44:56,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:44:56,298 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:56,299 INFO L225 Difference]: With dead ends: 257 [2019-12-18 11:44:56,299 INFO L226 Difference]: Without dead ends: 256 [2019-12-18 11:44:56,299 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:44:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-18 11:44:56,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 166. [2019-12-18 11:44:56,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-12-18 11:44:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 382 transitions. [2019-12-18 11:44:56,308 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 382 transitions. Word has length 14 [2019-12-18 11:44:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:56,308 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 382 transitions. [2019-12-18 11:44:56,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 382 transitions. [2019-12-18 11:44:56,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:56,308 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:56,308 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:56,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:56,509 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:56,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:56,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 133 times [2019-12-18 11:44:56,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:56,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036405992] [2019-12-18 11:44:56,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:56,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036405992] [2019-12-18 11:44:56,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666027230] [2019-12-18 11:44:56,594 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:56,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:56,634 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:56,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:56,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:56,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494419036] [2019-12-18 11:44:56,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:56,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:56,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:56,732 INFO L87 Difference]: Start difference. First operand 166 states and 382 transitions. Second operand 18 states. [2019-12-18 11:44:57,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:57,081 INFO L93 Difference]: Finished difference Result 256 states and 564 transitions. [2019-12-18 11:44:57,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:44:57,081 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:57,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:57,082 INFO L225 Difference]: With dead ends: 256 [2019-12-18 11:44:57,082 INFO L226 Difference]: Without dead ends: 255 [2019-12-18 11:44:57,083 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:44:57,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-18 11:44:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 166. [2019-12-18 11:44:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-12-18 11:44:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 382 transitions. [2019-12-18 11:44:57,086 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 382 transitions. Word has length 14 [2019-12-18 11:44:57,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:57,087 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 382 transitions. [2019-12-18 11:44:57,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:57,087 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 382 transitions. [2019-12-18 11:44:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:57,087 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:57,087 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:57,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:57,288 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:57,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 134 times [2019-12-18 11:44:57,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:57,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745190251] [2019-12-18 11:44:57,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:57,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745190251] [2019-12-18 11:44:57,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438988612] [2019-12-18 11:44:57,367 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:57,413 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:57,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:57,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:57,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:57,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:57,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:57,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790000270] [2019-12-18 11:44:57,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:57,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:57,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:57,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:57,516 INFO L87 Difference]: Start difference. First operand 166 states and 382 transitions. Second operand 18 states. [2019-12-18 11:44:57,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:57,946 INFO L93 Difference]: Finished difference Result 252 states and 555 transitions. [2019-12-18 11:44:57,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:44:57,947 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:57,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:57,948 INFO L225 Difference]: With dead ends: 252 [2019-12-18 11:44:57,948 INFO L226 Difference]: Without dead ends: 249 [2019-12-18 11:44:57,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:44:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-18 11:44:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 162. [2019-12-18 11:44:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 11:44:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 371 transitions. [2019-12-18 11:44:57,952 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 371 transitions. Word has length 14 [2019-12-18 11:44:57,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:57,952 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 371 transitions. [2019-12-18 11:44:57,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 371 transitions. [2019-12-18 11:44:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:57,953 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:57,953 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:58,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:58,154 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:58,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:58,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 135 times [2019-12-18 11:44:58,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:58,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579243168] [2019-12-18 11:44:58,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:58,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579243168] [2019-12-18 11:44:58,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785734616] [2019-12-18 11:44:58,500 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:58,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:44:58,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:58,576 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:58,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:58,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:58,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:58,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175593434] [2019-12-18 11:44:58,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:58,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:58,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:58,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:58,874 INFO L87 Difference]: Start difference. First operand 162 states and 371 transitions. Second operand 18 states. [2019-12-18 11:44:59,457 WARN L192 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2019-12-18 11:45:00,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:00,135 INFO L93 Difference]: Finished difference Result 245 states and 539 transitions. [2019-12-18 11:45:00,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:00,135 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:00,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:00,136 INFO L225 Difference]: With dead ends: 245 [2019-12-18 11:45:00,137 INFO L226 Difference]: Without dead ends: 244 [2019-12-18 11:45:00,137 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=359, Invalid=697, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:45:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-12-18 11:45:00,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 158. [2019-12-18 11:45:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 11:45:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 359 transitions. [2019-12-18 11:45:00,142 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 359 transitions. Word has length 14 [2019-12-18 11:45:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:00,143 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 359 transitions. [2019-12-18 11:45:00,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 359 transitions. [2019-12-18 11:45:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:00,143 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:00,144 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:00,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:00,347 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:00,347 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 136 times [2019-12-18 11:45:00,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:00,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877906124] [2019-12-18 11:45:00,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:00,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877906124] [2019-12-18 11:45:00,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005761307] [2019-12-18 11:45:00,441 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:45:00,485 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:00,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:00,486 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:00,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:00,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:00,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:00,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119433552] [2019-12-18 11:45:00,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:00,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:00,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:00,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:00,591 INFO L87 Difference]: Start difference. First operand 158 states and 359 transitions. Second operand 18 states. [2019-12-18 11:45:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:01,025 INFO L93 Difference]: Finished difference Result 194 states and 423 transitions. [2019-12-18 11:45:01,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:45:01,025 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:01,026 INFO L225 Difference]: With dead ends: 194 [2019-12-18 11:45:01,027 INFO L226 Difference]: Without dead ends: 192 [2019-12-18 11:45:01,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-18 11:45:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 154. [2019-12-18 11:45:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:45:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 355 transitions. [2019-12-18 11:45:01,031 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 355 transitions. Word has length 14 [2019-12-18 11:45:01,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:01,031 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 355 transitions. [2019-12-18 11:45:01,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 355 transitions. [2019-12-18 11:45:01,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:01,032 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:01,032 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:01,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:01,233 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:01,233 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 137 times [2019-12-18 11:45:01,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:01,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573847217] [2019-12-18 11:45:01,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:01,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573847217] [2019-12-18 11:45:01,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318842489] [2019-12-18 11:45:01,320 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:45:01,363 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:45:01,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:01,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:01,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:01,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:01,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:01,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126654254] [2019-12-18 11:45:01,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:01,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:01,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:01,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:01,626 INFO L87 Difference]: Start difference. First operand 154 states and 355 transitions. Second operand 18 states. [2019-12-18 11:45:02,096 WARN L192 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:45:03,121 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:45:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:03,139 INFO L93 Difference]: Finished difference Result 223 states and 476 transitions. [2019-12-18 11:45:03,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:45:03,140 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:03,141 INFO L225 Difference]: With dead ends: 223 [2019-12-18 11:45:03,141 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 11:45:03,141 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=319, Invalid=673, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 11:45:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2019-12-18 11:45:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:45:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 362 transitions. [2019-12-18 11:45:03,144 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 362 transitions. Word has length 14 [2019-12-18 11:45:03,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:03,144 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 362 transitions. [2019-12-18 11:45:03,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 362 transitions. [2019-12-18 11:45:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:03,145 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:03,145 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:03,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:03,346 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:03,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:03,346 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 138 times [2019-12-18 11:45:03,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:03,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123517490] [2019-12-18 11:45:03,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:03,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123517490] [2019-12-18 11:45:03,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782117695] [2019-12-18 11:45:03,445 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:45:03,485 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:45:03,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:03,486 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:03,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:03,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:03,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:03,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172630343] [2019-12-18 11:45:03,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:03,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:03,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:03,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:03,617 INFO L87 Difference]: Start difference. First operand 156 states and 362 transitions. Second operand 18 states. [2019-12-18 11:45:04,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:04,277 INFO L93 Difference]: Finished difference Result 209 states and 453 transitions. [2019-12-18 11:45:04,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:45:04,277 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:04,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:04,278 INFO L225 Difference]: With dead ends: 209 [2019-12-18 11:45:04,278 INFO L226 Difference]: Without dead ends: 206 [2019-12-18 11:45:04,279 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:04,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-18 11:45:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 154. [2019-12-18 11:45:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:45:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 355 transitions. [2019-12-18 11:45:04,283 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 355 transitions. Word has length 14 [2019-12-18 11:45:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:04,283 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 355 transitions. [2019-12-18 11:45:04,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 355 transitions. [2019-12-18 11:45:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:04,288 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:04,288 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:04,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:04,491 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:04,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:04,491 INFO L82 PathProgramCache]: Analyzing trace with hash -595816365, now seen corresponding path program 139 times [2019-12-18 11:45:04,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:04,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940196971] [2019-12-18 11:45:04,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:04,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940196971] [2019-12-18 11:45:04,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179780735] [2019-12-18 11:45:04,619 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:45:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:04,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:04,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:09,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:09,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:09,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401626887] [2019-12-18 11:45:09,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:09,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:09,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:09,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:09,173 INFO L87 Difference]: Start difference. First operand 154 states and 355 transitions. Second operand 18 states. [2019-12-18 11:45:11,415 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 11:45:11,959 WARN L192 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-18 11:45:17,981 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 11:45:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:20,051 INFO L93 Difference]: Finished difference Result 223 states and 478 transitions. [2019-12-18 11:45:20,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:20,051 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:20,052 INFO L225 Difference]: With dead ends: 223 [2019-12-18 11:45:20,052 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:45:20,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=311, Invalid=679, Unknown=2, NotChecked=0, Total=992 [2019-12-18 11:45:20,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:45:20,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 156. [2019-12-18 11:45:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:45:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 361 transitions. [2019-12-18 11:45:20,055 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 361 transitions. Word has length 14 [2019-12-18 11:45:20,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:20,056 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 361 transitions. [2019-12-18 11:45:20,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:20,056 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 361 transitions. [2019-12-18 11:45:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:20,056 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:20,056 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:20,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:20,257 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:20,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:20,258 INFO L82 PathProgramCache]: Analyzing trace with hash -595821015, now seen corresponding path program 140 times [2019-12-18 11:45:20,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:20,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675854643] [2019-12-18 11:45:20,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:20,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675854643] [2019-12-18 11:45:20,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019282927] [2019-12-18 11:45:20,341 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:45:20,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:45:20,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:20,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:20,384 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:22,757 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_493 Int)) (and (<= (div (+ (* v_~i~0_493 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ (* 3 v_~i~0_493) 2)) (<= c_~i~0 (+ c_~j~0 (* 2 v_~i~0_493) 1)))) is different from true [2019-12-18 11:45:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:22,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:22,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:22,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105123440] [2019-12-18 11:45:22,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:22,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:22,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:22,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=192, Unknown=3, NotChecked=30, Total=306 [2019-12-18 11:45:22,759 INFO L87 Difference]: Start difference. First operand 156 states and 361 transitions. Second operand 18 states. [2019-12-18 11:45:23,036 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-18 11:45:23,996 WARN L192 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2019-12-18 11:45:24,453 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-12-18 11:45:25,242 WARN L192 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-18 11:45:26,213 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-18 11:45:26,749 WARN L192 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2019-12-18 11:45:26,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:26,772 INFO L93 Difference]: Finished difference Result 244 states and 522 transitions. [2019-12-18 11:45:26,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:26,772 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:26,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:26,773 INFO L225 Difference]: With dead ends: 244 [2019-12-18 11:45:26,773 INFO L226 Difference]: Without dead ends: 237 [2019-12-18 11:45:26,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=329, Invalid=664, Unknown=3, NotChecked=60, Total=1056 [2019-12-18 11:45:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-18 11:45:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 158. [2019-12-18 11:45:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 11:45:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 368 transitions. [2019-12-18 11:45:26,777 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 368 transitions. Word has length 14 [2019-12-18 11:45:26,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:26,777 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 368 transitions. [2019-12-18 11:45:26,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 368 transitions. [2019-12-18 11:45:26,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:26,778 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:26,778 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:26,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:26,980 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash -595821170, now seen corresponding path program 141 times [2019-12-18 11:45:26,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:26,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050345050] [2019-12-18 11:45:26,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:27,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050345050] [2019-12-18 11:45:27,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138689464] [2019-12-18 11:45:27,066 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:45:27,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:45:27,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:27,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:27,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:30,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:30,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:30,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329341099] [2019-12-18 11:45:30,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:30,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:30,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:30,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2019-12-18 11:45:30,854 INFO L87 Difference]: Start difference. First operand 158 states and 368 transitions. Second operand 18 states. [2019-12-18 11:45:31,850 WARN L192 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2019-12-18 11:45:33,357 WARN L192 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2019-12-18 11:45:34,460 WARN L192 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-18 11:45:36,510 WARN L192 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 11:45:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:36,540 INFO L93 Difference]: Finished difference Result 237 states and 507 transitions. [2019-12-18 11:45:36,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:45:36,541 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:36,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:36,542 INFO L225 Difference]: With dead ends: 237 [2019-12-18 11:45:36,542 INFO L226 Difference]: Without dead ends: 235 [2019-12-18 11:45:36,542 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=331, Invalid=719, Unknown=6, NotChecked=0, Total=1056 [2019-12-18 11:45:36,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-18 11:45:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 156. [2019-12-18 11:45:36,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:45:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 361 transitions. [2019-12-18 11:45:36,546 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 361 transitions. Word has length 14 [2019-12-18 11:45:36,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:36,546 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 361 transitions. [2019-12-18 11:45:36,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:36,546 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 361 transitions. [2019-12-18 11:45:36,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:36,546 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:36,546 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:36,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:36,747 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:36,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:36,748 INFO L82 PathProgramCache]: Analyzing trace with hash -595965320, now seen corresponding path program 142 times [2019-12-18 11:45:36,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:36,748 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824295975] [2019-12-18 11:45:36,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:36,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824295975] [2019-12-18 11:45:36,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356974403] [2019-12-18 11:45:36,828 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:45:36,871 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:36,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:36,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:36,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:38,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:38,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:38,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966482423] [2019-12-18 11:45:38,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:38,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:38,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:38,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=221, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:45:38,468 INFO L87 Difference]: Start difference. First operand 156 states and 361 transitions. Second operand 18 states. [2019-12-18 11:45:39,201 WARN L192 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 11:45:40,191 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-12-18 11:45:40,825 WARN L192 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-12-18 11:45:40,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:40,977 INFO L93 Difference]: Finished difference Result 233 states and 502 transitions. [2019-12-18 11:45:40,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:40,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:40,978 INFO L225 Difference]: With dead ends: 233 [2019-12-18 11:45:40,979 INFO L226 Difference]: Without dead ends: 232 [2019-12-18 11:45:40,979 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=365, Invalid=756, Unknown=1, NotChecked=0, Total=1122 [2019-12-18 11:45:40,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-12-18 11:45:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 154. [2019-12-18 11:45:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:45:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 355 transitions. [2019-12-18 11:45:40,983 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 355 transitions. Word has length 14 [2019-12-18 11:45:40,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:40,983 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 355 transitions. [2019-12-18 11:45:40,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 355 transitions. [2019-12-18 11:45:40,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:40,984 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:40,984 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:41,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:41,187 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:41,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:41,187 INFO L82 PathProgramCache]: Analyzing trace with hash -734344515, now seen corresponding path program 143 times [2019-12-18 11:45:41,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:41,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331958552] [2019-12-18 11:45:41,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:41,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331958552] [2019-12-18 11:45:41,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853879785] [2019-12-18 11:45:41,303 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:45:41,374 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:45:41,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:41,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:41,376 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:45,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:45,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:45,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585851502] [2019-12-18 11:45:45,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:45,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:45,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:45,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:45,737 INFO L87 Difference]: Start difference. First operand 154 states and 355 transitions. Second operand 18 states. [2019-12-18 11:45:48,252 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 11:45:50,626 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 11:45:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:50,796 INFO L93 Difference]: Finished difference Result 222 states and 475 transitions. [2019-12-18 11:45:50,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:45:50,796 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:50,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:50,797 INFO L225 Difference]: With dead ends: 222 [2019-12-18 11:45:50,797 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 11:45:50,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=335, Invalid=787, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:45:50,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 11:45:50,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2019-12-18 11:45:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:45:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 361 transitions. [2019-12-18 11:45:50,800 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 361 transitions. Word has length 14 [2019-12-18 11:45:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:50,801 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 361 transitions. [2019-12-18 11:45:50,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 361 transitions. [2019-12-18 11:45:50,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:50,801 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:50,801 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:51,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:51,002 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:51,002 INFO L82 PathProgramCache]: Analyzing trace with hash -734349165, now seen corresponding path program 144 times [2019-12-18 11:45:51,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:51,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93720391] [2019-12-18 11:45:51,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:51,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93720391] [2019-12-18 11:45:51,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204526005] [2019-12-18 11:45:51,086 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:45:51,129 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:45:51,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:51,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:51,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:55,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:55,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:55,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875951465] [2019-12-18 11:45:55,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:55,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:55,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:55,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=220, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:45:55,970 INFO L87 Difference]: Start difference. First operand 156 states and 361 transitions. Second operand 18 states. Received shutdown request... [2019-12-18 11:45:58,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:45:58,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:58,873 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 11:45:58,877 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 11:45:58,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:45:58 BasicIcfg [2019-12-18 11:45:58,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 11:45:58,878 INFO L168 Benchmark]: Toolchain (without parser) took 288108.88 ms. Allocated memory was 146.3 MB in the beginning and 179.3 MB in the end (delta: 33.0 MB). Free memory was 102.7 MB in the beginning and 125.3 MB in the end (delta: -22.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:58,879 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 146.3 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-18 11:45:58,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 689.20 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 102.3 MB in the beginning and 160.8 MB in the end (delta: -58.5 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:58,879 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.84 ms. Allocated memory is still 203.4 MB. Free memory was 160.8 MB in the beginning and 158.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:58,879 INFO L168 Benchmark]: Boogie Preprocessor took 34.11 ms. Allocated memory is still 203.4 MB. Free memory was 158.9 MB in the beginning and 157.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:58,880 INFO L168 Benchmark]: RCFGBuilder took 474.00 ms. Allocated memory is still 203.4 MB. Free memory was 157.6 MB in the beginning and 137.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:58,880 INFO L168 Benchmark]: TraceAbstraction took 286829.78 ms. Allocated memory was 203.4 MB in the beginning and 179.3 MB in the end (delta: -24.1 MB). Free memory was 137.5 MB in the beginning and 125.3 MB in the end (delta: 12.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-18 11:45:58,882 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 146.3 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 689.20 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 102.3 MB in the beginning and 160.8 MB in the end (delta: -58.5 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 76.84 ms. Allocated memory is still 203.4 MB. Free memory was 160.8 MB in the beginning and 158.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.11 ms. Allocated memory is still 203.4 MB. Free memory was 158.9 MB in the beginning and 157.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 474.00 ms. Allocated memory is still 203.4 MB. Free memory was 157.6 MB in the beginning and 137.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 286829.78 ms. Allocated memory was 203.4 MB in the beginning and 179.3 MB in the end (delta: -24.1 MB). Free memory was 137.5 MB in the beginning and 125.3 MB in the end (delta: 12.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.6s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 433 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 686 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (156states) and FLOYD_HOARE automaton (currently 11 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 26 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 286.7s, OverallIterations: 158, TraceHistogramMax: 7, AutomataDifference: 155.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1560 SDtfs, 19908 SDslu, 12084 SDs, 0 SdLazy, 6898 SolverSat, 3957 SolverUnsat, 29 SolverUnknown, 0 SolverNotchecked, 39.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4298 GetRequests, 758 SyntacticMatches, 16 SemanticMatches, 3523 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 20309 ImplicationChecksByTransitivity, 196.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=167occurred in iteration=139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 157 MinimizatonAttempts, 7325 StatesRemovedByMinimization, 154 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 88.5s InterpolantComputationTime, 3919 NumberOfCodeBlocks, 3919 NumberOfCodeBlocksAsserted, 509 NumberOfCheckSat, 3608 ConstructedInterpolants, 159 QuantifiedInterpolants, 420842 SizeOfPredicates, 0 NumberOfNonLiveVariables, 14131 ConjunctsInSsa, 1644 ConjunctsInUnsatCore, 311 InterpolantComputations, 7 PerfectInterpolantSequences, 36/2174 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown