/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 23:31:09,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 23:31:09,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 23:31:09,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 23:31:09,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 23:31:09,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 23:31:09,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 23:31:09,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 23:31:09,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 23:31:09,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 23:31:09,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 23:31:09,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 23:31:09,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 23:31:09,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 23:31:09,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 23:31:09,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 23:31:09,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 23:31:09,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 23:31:09,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 23:31:09,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 23:31:09,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 23:31:09,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 23:31:09,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 23:31:09,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 23:31:09,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-18 23:31:09,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-18 23:31:09,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-18 23:31:09,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-18 23:31:09,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-18 23:31:09,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-18 23:31:09,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 23:31:09,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 23:31:09,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 23:31:09,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 23:31:09,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 23:31:09,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 23:31:09,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 23:31:09,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 23:31:09,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 23:31:09,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 23:31:09,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 23:31:09,439 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2019-12-18 23:31:09,453 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 23:31:09,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 23:31:09,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 23:31:09,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 23:31:09,455 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 23:31:09,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 23:31:09,455 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 23:31:09,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 23:31:09,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 23:31:09,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 23:31:09,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 23:31:09,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 23:31:09,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 23:31:09,456 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 23:31:09,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 23:31:09,457 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 23:31:09,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 23:31:09,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 23:31:09,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 23:31:09,458 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 23:31:09,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 23:31:09,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 23:31:09,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 23:31:09,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 23:31:09,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 23:31:09,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 23:31:09,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 23:31:09,459 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2019-12-18 23:31:09,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 23:31:09,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 23:31:09,737 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 23:31:09,754 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 23:31:09,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 23:31:09,761 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 23:31:09,762 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 23:31:09,763 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2019-12-18 23:31:09,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3587c5866/bd4a310ec5644f7194d655db8230b934/FLAG8734b1c64 [2019-12-18 23:31:10,399 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 23:31:10,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2019-12-18 23:31:10,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3587c5866/bd4a310ec5644f7194d655db8230b934/FLAG8734b1c64 [2019-12-18 23:31:10,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3587c5866/bd4a310ec5644f7194d655db8230b934 [2019-12-18 23:31:10,666 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 23:31:10,668 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 23:31:10,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 23:31:10,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 23:31:10,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 23:31:10,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:31:10" (1/1) ... [2019-12-18 23:31:10,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c134131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:10, skipping insertion in model container [2019-12-18 23:31:10,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:31:10" (1/1) ... [2019-12-18 23:31:10,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 23:31:10,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 23:31:11,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 23:31:11,269 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 23:31:11,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 23:31:11,398 INFO L208 MainTranslator]: Completed translation [2019-12-18 23:31:11,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11 WrapperNode [2019-12-18 23:31:11,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 23:31:11,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 23:31:11,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 23:31:11,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 23:31:11,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 23:31:11,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 23:31:11,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 23:31:11,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 23:31:11,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 23:31:11,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 23:31:11,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 23:31:11,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 23:31:11,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (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 23:31:11,557 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 23:31:11,557 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 23:31:11,557 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 23:31:11,557 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 23:31:11,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 23:31:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 23:31:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 23:31:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 23:31:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 23:31:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 23:31:11,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 23:31:11,560 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 23:31:11,904 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 23:31:11,905 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 23:31:11,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:31:11 BoogieIcfgContainer [2019-12-18 23:31:11,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 23:31:11,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 23:31:11,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 23:31:11,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 23:31:11,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:31:10" (1/3) ... [2019-12-18 23:31:11,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc22c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:31:11, skipping insertion in model container [2019-12-18 23:31:11,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (2/3) ... [2019-12-18 23:31:11,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc22c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:31:11, skipping insertion in model container [2019-12-18 23:31:11,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:31:11" (3/3) ... [2019-12-18 23:31:11,914 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2019-12-18 23:31:11,922 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 23:31:11,922 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 23:31:11,930 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 23:31:11,931 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 23:31:11,963 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,963 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,963 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,964 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,964 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,964 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,964 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,965 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,965 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,965 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,965 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,965 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,966 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,966 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,966 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,966 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,967 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,967 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,967 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,967 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,967 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,968 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,968 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,968 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,969 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,969 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,969 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,969 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,970 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,970 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,974 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,974 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,975 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,975 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,975 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,975 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,981 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,981 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,982 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,982 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,982 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,983 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:12,000 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 23:31:12,022 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 23:31:12,022 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 23:31:12,022 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 23:31:12,022 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 23:31:12,023 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 23:31:12,023 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 23:31:12,023 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 23:31:12,023 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 23:31:12,034 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 53 transitions [2019-12-18 23:31:12,121 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1244 states. [2019-12-18 23:31:12,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states. [2019-12-18 23:31:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-18 23:31:12,134 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:12,135 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:12,136 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:12,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:12,142 INFO L82 PathProgramCache]: Analyzing trace with hash -54944204, now seen corresponding path program 1 times [2019-12-18 23:31:12,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:12,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541049774] [2019-12-18 23:31:12,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:12,538 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 23:31:12,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541049774] [2019-12-18 23:31:12,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:31:12,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-18 23:31:12,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73118886] [2019-12-18 23:31:12,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 23:31:12,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:12,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 23:31:12,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 23:31:12,563 INFO L87 Difference]: Start difference. First operand 1244 states. Second operand 5 states. [2019-12-18 23:31:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:12,784 INFO L93 Difference]: Finished difference Result 2093 states and 6041 transitions. [2019-12-18 23:31:12,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 23:31:12,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-12-18 23:31:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:12,808 INFO L225 Difference]: With dead ends: 2093 [2019-12-18 23:31:12,808 INFO L226 Difference]: Without dead ends: 572 [2019-12-18 23:31:12,810 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-18 23:31:12,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-12-18 23:31:12,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 460. [2019-12-18 23:31:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2019-12-18 23:31:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1179 transitions. [2019-12-18 23:31:12,897 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1179 transitions. Word has length 20 [2019-12-18 23:31:12,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:12,897 INFO L462 AbstractCegarLoop]: Abstraction has 460 states and 1179 transitions. [2019-12-18 23:31:12,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 23:31:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1179 transitions. [2019-12-18 23:31:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-18 23:31:12,899 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:12,899 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:12,900 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:12,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:12,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1539658704, now seen corresponding path program 1 times [2019-12-18 23:31:12,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:12,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467675363] [2019-12-18 23:31:12,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:13,079 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 23:31:13,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467675363] [2019-12-18 23:31:13,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:31:13,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-18 23:31:13,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493056619] [2019-12-18 23:31:13,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-18 23:31:13,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:13,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-18 23:31:13,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-18 23:31:13,083 INFO L87 Difference]: Start difference. First operand 460 states and 1179 transitions. Second operand 6 states. [2019-12-18 23:31:13,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:13,172 INFO L93 Difference]: Finished difference Result 768 states and 1928 transitions. [2019-12-18 23:31:13,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 23:31:13,173 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-12-18 23:31:13,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:13,178 INFO L225 Difference]: With dead ends: 768 [2019-12-18 23:31:13,178 INFO L226 Difference]: Without dead ends: 612 [2019-12-18 23:31:13,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-12-18 23:31:13,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-12-18 23:31:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 488. [2019-12-18 23:31:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2019-12-18 23:31:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1239 transitions. [2019-12-18 23:31:13,208 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1239 transitions. Word has length 24 [2019-12-18 23:31:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:13,208 INFO L462 AbstractCegarLoop]: Abstraction has 488 states and 1239 transitions. [2019-12-18 23:31:13,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-18 23:31:13,208 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1239 transitions. [2019-12-18 23:31:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-18 23:31:13,210 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:13,210 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:13,211 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:13,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1257295600, now seen corresponding path program 1 times [2019-12-18 23:31:13,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:13,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033910812] [2019-12-18 23:31:13,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:13,385 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 23:31:13,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033910812] [2019-12-18 23:31:13,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:31:13,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-18 23:31:13,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013350908] [2019-12-18 23:31:13,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-18 23:31:13,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:13,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-18 23:31:13,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-18 23:31:13,389 INFO L87 Difference]: Start difference. First operand 488 states and 1239 transitions. Second operand 6 states. [2019-12-18 23:31:13,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:13,504 INFO L93 Difference]: Finished difference Result 801 states and 1994 transitions. [2019-12-18 23:31:13,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 23:31:13,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-12-18 23:31:13,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:13,510 INFO L225 Difference]: With dead ends: 801 [2019-12-18 23:31:13,510 INFO L226 Difference]: Without dead ends: 673 [2019-12-18 23:31:13,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-12-18 23:31:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-12-18 23:31:13,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 554. [2019-12-18 23:31:13,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-12-18 23:31:13,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1367 transitions. [2019-12-18 23:31:13,536 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1367 transitions. Word has length 24 [2019-12-18 23:31:13,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:13,537 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 1367 transitions. [2019-12-18 23:31:13,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-18 23:31:13,538 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1367 transitions. [2019-12-18 23:31:13,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-18 23:31:13,546 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:13,546 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:13,547 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:13,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:13,547 INFO L82 PathProgramCache]: Analyzing trace with hash -391152653, now seen corresponding path program 1 times [2019-12-18 23:31:13,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:13,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25713337] [2019-12-18 23:31:13,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:13,758 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 23:31:13,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25713337] [2019-12-18 23:31:13,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600534551] [2019-12-18 23:31:13,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:31:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:13,838 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 23:31:13,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:13,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:13,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:13,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:13,988 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 23:31:13,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:13,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-18 23:31:13,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814879127] [2019-12-18 23:31:13,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 23:31:13,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:13,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 23:31:13,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-12-18 23:31:13,993 INFO L87 Difference]: Start difference. First operand 554 states and 1367 transitions. Second operand 10 states. [2019-12-18 23:31:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:14,158 INFO L93 Difference]: Finished difference Result 967 states and 2375 transitions. [2019-12-18 23:31:14,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 23:31:14,159 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-12-18 23:31:14,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:14,164 INFO L225 Difference]: With dead ends: 967 [2019-12-18 23:31:14,164 INFO L226 Difference]: Without dead ends: 753 [2019-12-18 23:31:14,164 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-12-18 23:31:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2019-12-18 23:31:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 610. [2019-12-18 23:31:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2019-12-18 23:31:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1487 transitions. [2019-12-18 23:31:14,189 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1487 transitions. Word has length 28 [2019-12-18 23:31:14,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:14,189 INFO L462 AbstractCegarLoop]: Abstraction has 610 states and 1487 transitions. [2019-12-18 23:31:14,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 23:31:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1487 transitions. [2019-12-18 23:31:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-18 23:31:14,191 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:14,191 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:14,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:14,397 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash 251821804, now seen corresponding path program 1 times [2019-12-18 23:31:14,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:14,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299449608] [2019-12-18 23:31:14,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:14,572 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 23:31:14,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299449608] [2019-12-18 23:31:14,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:31:14,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-18 23:31:14,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365526173] [2019-12-18 23:31:14,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 23:31:14,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:14,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 23:31:14,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-18 23:31:14,575 INFO L87 Difference]: Start difference. First operand 610 states and 1487 transitions. Second operand 7 states. [2019-12-18 23:31:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:14,843 INFO L93 Difference]: Finished difference Result 900 states and 2192 transitions. [2019-12-18 23:31:14,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 23:31:14,843 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-12-18 23:31:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:14,849 INFO L225 Difference]: With dead ends: 900 [2019-12-18 23:31:14,849 INFO L226 Difference]: Without dead ends: 793 [2019-12-18 23:31:14,849 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-12-18 23:31:14,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2019-12-18 23:31:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 619. [2019-12-18 23:31:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-12-18 23:31:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1505 transitions. [2019-12-18 23:31:14,871 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1505 transitions. Word has length 28 [2019-12-18 23:31:14,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:14,872 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 1505 transitions. [2019-12-18 23:31:14,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 23:31:14,872 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1505 transitions. [2019-12-18 23:31:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-18 23:31:14,873 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:14,873 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:14,874 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:14,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:14,874 INFO L82 PathProgramCache]: Analyzing trace with hash -944108684, now seen corresponding path program 2 times [2019-12-18 23:31:14,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:14,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864990155] [2019-12-18 23:31:14,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:14,990 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 23:31:14,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864990155] [2019-12-18 23:31:14,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:31:14,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-18 23:31:14,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975248062] [2019-12-18 23:31:14,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 23:31:14,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:14,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 23:31:14,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-18 23:31:14,992 INFO L87 Difference]: Start difference. First operand 619 states and 1505 transitions. Second operand 7 states. [2019-12-18 23:31:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:15,142 INFO L93 Difference]: Finished difference Result 940 states and 2272 transitions. [2019-12-18 23:31:15,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 23:31:15,142 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-12-18 23:31:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:15,148 INFO L225 Difference]: With dead ends: 940 [2019-12-18 23:31:15,148 INFO L226 Difference]: Without dead ends: 833 [2019-12-18 23:31:15,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-12-18 23:31:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2019-12-18 23:31:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 622. [2019-12-18 23:31:15,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-12-18 23:31:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1514 transitions. [2019-12-18 23:31:15,171 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1514 transitions. Word has length 28 [2019-12-18 23:31:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:15,172 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 1514 transitions. [2019-12-18 23:31:15,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 23:31:15,173 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1514 transitions. [2019-12-18 23:31:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-18 23:31:15,174 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:15,174 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:15,174 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:15,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:15,175 INFO L82 PathProgramCache]: Analyzing trace with hash -724803213, now seen corresponding path program 1 times [2019-12-18 23:31:15,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:15,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951565327] [2019-12-18 23:31:15,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:15,282 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 23:31:15,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951565327] [2019-12-18 23:31:15,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102730351] [2019-12-18 23:31:15,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:31:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:15,349 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 23:31:15,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:15,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:15,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:15,414 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 23:31:15,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:15,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-18 23:31:15,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727023536] [2019-12-18 23:31:15,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 23:31:15,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:15,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 23:31:15,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-12-18 23:31:15,417 INFO L87 Difference]: Start difference. First operand 622 states and 1514 transitions. Second operand 10 states. [2019-12-18 23:31:15,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:15,581 INFO L93 Difference]: Finished difference Result 1080 states and 2601 transitions. [2019-12-18 23:31:15,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 23:31:15,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-12-18 23:31:15,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:15,587 INFO L225 Difference]: With dead ends: 1080 [2019-12-18 23:31:15,587 INFO L226 Difference]: Without dead ends: 894 [2019-12-18 23:31:15,588 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:15,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2019-12-18 23:31:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 671. [2019-12-18 23:31:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2019-12-18 23:31:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1616 transitions. [2019-12-18 23:31:15,609 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1616 transitions. Word has length 28 [2019-12-18 23:31:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:15,610 INFO L462 AbstractCegarLoop]: Abstraction has 671 states and 1616 transitions. [2019-12-18 23:31:15,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 23:31:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1616 transitions. [2019-12-18 23:31:15,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-18 23:31:15,611 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:15,611 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:15,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:15,815 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:15,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:15,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1764996399, now seen corresponding path program 1 times [2019-12-18 23:31:15,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:15,816 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874432306] [2019-12-18 23:31:15,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:15,958 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 23:31:15,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874432306] [2019-12-18 23:31:15,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702531910] [2019-12-18 23:31:15,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:31:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:16,010 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 23:31:16,016 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:16,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:16,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:16,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:16,105 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 23:31:16,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:16,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-18 23:31:16,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210470910] [2019-12-18 23:31:16,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 23:31:16,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:16,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 23:31:16,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-18 23:31:16,110 INFO L87 Difference]: Start difference. First operand 671 states and 1616 transitions. Second operand 12 states. [2019-12-18 23:31:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:16,300 INFO L93 Difference]: Finished difference Result 1167 states and 2779 transitions. [2019-12-18 23:31:16,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 23:31:16,301 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2019-12-18 23:31:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:16,308 INFO L225 Difference]: With dead ends: 1167 [2019-12-18 23:31:16,308 INFO L226 Difference]: Without dead ends: 1002 [2019-12-18 23:31:16,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2019-12-18 23:31:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2019-12-18 23:31:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 683. [2019-12-18 23:31:16,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-12-18 23:31:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1643 transitions. [2019-12-18 23:31:16,332 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1643 transitions. Word has length 32 [2019-12-18 23:31:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:16,333 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1643 transitions. [2019-12-18 23:31:16,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 23:31:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1643 transitions. [2019-12-18 23:31:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-18 23:31:16,334 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:16,334 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:16,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:16,547 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:16,547 INFO L82 PathProgramCache]: Analyzing trace with hash -665996433, now seen corresponding path program 1 times [2019-12-18 23:31:16,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:16,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477385413] [2019-12-18 23:31:16,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:16,718 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 23:31:16,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477385413] [2019-12-18 23:31:16,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413023708] [2019-12-18 23:31:16,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:31:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:16,790 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 23:31:16,793 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:16,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:16,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:16,868 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 23:31:16,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:16,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-18 23:31:16,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980573246] [2019-12-18 23:31:16,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 23:31:16,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:16,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 23:31:16,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-12-18 23:31:16,870 INFO L87 Difference]: Start difference. First operand 683 states and 1643 transitions. Second operand 12 states. [2019-12-18 23:31:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:17,072 INFO L93 Difference]: Finished difference Result 1331 states and 3128 transitions. [2019-12-18 23:31:17,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 23:31:17,073 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2019-12-18 23:31:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:17,080 INFO L225 Difference]: With dead ends: 1331 [2019-12-18 23:31:17,080 INFO L226 Difference]: Without dead ends: 1124 [2019-12-18 23:31:17,080 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:31:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2019-12-18 23:31:17,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 793. [2019-12-18 23:31:17,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2019-12-18 23:31:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1863 transitions. [2019-12-18 23:31:17,103 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1863 transitions. Word has length 32 [2019-12-18 23:31:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:17,104 INFO L462 AbstractCegarLoop]: Abstraction has 793 states and 1863 transitions. [2019-12-18 23:31:17,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 23:31:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1863 transitions. [2019-12-18 23:31:17,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-18 23:31:17,105 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:17,105 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:17,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:17,312 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:17,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:17,312 INFO L82 PathProgramCache]: Analyzing trace with hash 423038713, now seen corresponding path program 2 times [2019-12-18 23:31:17,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:17,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216892794] [2019-12-18 23:31:17,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:17,478 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 23:31:17,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216892794] [2019-12-18 23:31:17,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855117814] [2019-12-18 23:31:17,479 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 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 23:31:17,540 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:17,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:17,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 23:31:17,545 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:17,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:17,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:17,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:17,657 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 23:31:17,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:17,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-18 23:31:17,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749702398] [2019-12-18 23:31:17,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 23:31:17,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:17,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 23:31:17,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:31:17,660 INFO L87 Difference]: Start difference. First operand 793 states and 1863 transitions. Second operand 14 states. [2019-12-18 23:31:17,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:17,793 INFO L93 Difference]: Finished difference Result 1243 states and 2943 transitions. [2019-12-18 23:31:17,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 23:31:17,794 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-18 23:31:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:17,801 INFO L225 Difference]: With dead ends: 1243 [2019-12-18 23:31:17,802 INFO L226 Difference]: Without dead ends: 1029 [2019-12-18 23:31:17,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-18 23:31:17,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2019-12-18 23:31:17,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 849. [2019-12-18 23:31:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 849 states. [2019-12-18 23:31:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1983 transitions. [2019-12-18 23:31:17,849 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1983 transitions. Word has length 36 [2019-12-18 23:31:17,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:17,851 INFO L462 AbstractCegarLoop]: Abstraction has 849 states and 1983 transitions. [2019-12-18 23:31:17,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 23:31:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1983 transitions. [2019-12-18 23:31:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-18 23:31:17,853 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:17,853 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:18,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:18,057 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:18,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1066013170, now seen corresponding path program 2 times [2019-12-18 23:31:18,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:18,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992548718] [2019-12-18 23:31:18,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:18,204 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 23:31:18,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992548718] [2019-12-18 23:31:18,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392513303] [2019-12-18 23:31:18,205 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:18,253 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:18,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:18,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:18,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:18,379 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:18,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:18,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:18,386 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 23:31:18,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:18,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2019-12-18 23:31:18,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597568370] [2019-12-18 23:31:18,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-18 23:31:18,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:18,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-18 23:31:18,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-12-18 23:31:18,390 INFO L87 Difference]: Start difference. First operand 849 states and 1983 transitions. Second operand 15 states. [2019-12-18 23:31:18,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:18,617 INFO L93 Difference]: Finished difference Result 1390 states and 3225 transitions. [2019-12-18 23:31:18,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 23:31:18,617 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2019-12-18 23:31:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:18,624 INFO L225 Difference]: With dead ends: 1390 [2019-12-18 23:31:18,624 INFO L226 Difference]: Without dead ends: 1225 [2019-12-18 23:31:18,625 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2019-12-18 23:31:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2019-12-18 23:31:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 840. [2019-12-18 23:31:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2019-12-18 23:31:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1968 transitions. [2019-12-18 23:31:18,649 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1968 transitions. Word has length 36 [2019-12-18 23:31:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:18,649 INFO L462 AbstractCegarLoop]: Abstraction has 840 states and 1968 transitions. [2019-12-18 23:31:18,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-18 23:31:18,649 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1968 transitions. [2019-12-18 23:31:18,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-18 23:31:18,651 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:18,651 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:18,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:18,854 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:18,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:18,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1256365814, now seen corresponding path program 1 times [2019-12-18 23:31:18,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:18,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247414905] [2019-12-18 23:31:18,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:18,990 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 23:31:18,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247414905] [2019-12-18 23:31:18,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013688867] [2019-12-18 23:31:18,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:31:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:19,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 23:31:19,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:19,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:19,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:19,150 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 23:31:19,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:19,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-18 23:31:19,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806297393] [2019-12-18 23:31:19,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 23:31:19,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:19,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 23:31:19,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:31:19,152 INFO L87 Difference]: Start difference. First operand 840 states and 1968 transitions. Second operand 14 states. [2019-12-18 23:31:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:19,655 INFO L93 Difference]: Finished difference Result 1660 states and 3790 transitions. [2019-12-18 23:31:19,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 23:31:19,656 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-18 23:31:19,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:19,663 INFO L225 Difference]: With dead ends: 1660 [2019-12-18 23:31:19,663 INFO L226 Difference]: Without dead ends: 1453 [2019-12-18 23:31:19,664 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2019-12-18 23:31:19,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2019-12-18 23:31:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 924. [2019-12-18 23:31:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2019-12-18 23:31:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 2129 transitions. [2019-12-18 23:31:19,691 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 2129 transitions. Word has length 36 [2019-12-18 23:31:19,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:19,691 INFO L462 AbstractCegarLoop]: Abstraction has 924 states and 2129 transitions. [2019-12-18 23:31:19,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 23:31:19,691 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 2129 transitions. [2019-12-18 23:31:19,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:19,693 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:19,693 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:19,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:19,897 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:19,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:19,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1962171945, now seen corresponding path program 2 times [2019-12-18 23:31:19,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:19,897 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180923284] [2019-12-18 23:31:19,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:20,040 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 23:31:20,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180923284] [2019-12-18 23:31:20,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692634316] [2019-12-18 23:31:20,040 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 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 23:31:20,094 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:20,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:20,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:20,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:20,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:20,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:20,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:20,322 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 23:31:20,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:20,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:20,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874176119] [2019-12-18 23:31:20,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:20,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:20,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:20,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:20,325 INFO L87 Difference]: Start difference. First operand 924 states and 2129 transitions. Second operand 16 states. [2019-12-18 23:31:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:21,205 INFO L93 Difference]: Finished difference Result 1731 states and 3907 transitions. [2019-12-18 23:31:21,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 23:31:21,206 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:21,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:21,212 INFO L225 Difference]: With dead ends: 1731 [2019-12-18 23:31:21,212 INFO L226 Difference]: Without dead ends: 1566 [2019-12-18 23:31:21,212 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2019-12-18 23:31:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2019-12-18 23:31:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 956. [2019-12-18 23:31:21,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956 states. [2019-12-18 23:31:21,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2209 transitions. [2019-12-18 23:31:21,258 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2209 transitions. Word has length 40 [2019-12-18 23:31:21,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:21,259 INFO L462 AbstractCegarLoop]: Abstraction has 956 states and 2209 transitions. [2019-12-18 23:31:21,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:21,259 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2209 transitions. [2019-12-18 23:31:21,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:21,260 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:21,261 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:21,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:21,467 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:21,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:21,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1589466279, now seen corresponding path program 3 times [2019-12-18 23:31:21,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:21,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960121455] [2019-12-18 23:31:21,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:21,621 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 23:31:21,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960121455] [2019-12-18 23:31:21,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084350901] [2019-12-18 23:31:21,621 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 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 23:31:21,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 23:31:21,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:21,670 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:21,672 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:21,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:21,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:21,778 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:21,786 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 23:31:21,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:21,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:21,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943644651] [2019-12-18 23:31:21,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:21,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:21,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:21,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:21,788 INFO L87 Difference]: Start difference. First operand 956 states and 2209 transitions. Second operand 16 states. [2019-12-18 23:31:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:22,428 INFO L93 Difference]: Finished difference Result 2176 states and 4895 transitions. [2019-12-18 23:31:22,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-18 23:31:22,428 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:22,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:22,436 INFO L225 Difference]: With dead ends: 2176 [2019-12-18 23:31:22,436 INFO L226 Difference]: Without dead ends: 1846 [2019-12-18 23:31:22,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=996, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 23:31:22,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2019-12-18 23:31:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1048. [2019-12-18 23:31:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2019-12-18 23:31:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2422 transitions. [2019-12-18 23:31:22,465 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2422 transitions. Word has length 40 [2019-12-18 23:31:22,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:22,465 INFO L462 AbstractCegarLoop]: Abstraction has 1048 states and 2422 transitions. [2019-12-18 23:31:22,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:22,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2422 transitions. [2019-12-18 23:31:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:22,467 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:22,467 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:22,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:22,671 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:22,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:22,671 INFO L82 PathProgramCache]: Analyzing trace with hash 962120459, now seen corresponding path program 2 times [2019-12-18 23:31:22,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:22,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323404403] [2019-12-18 23:31:22,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:22,826 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 23:31:22,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323404403] [2019-12-18 23:31:22,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005750617] [2019-12-18 23:31:22,831 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 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 23:31:22,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:22,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:22,894 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:22,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:23,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:23,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:23,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:23,013 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 23:31:23,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:23,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:23,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922918343] [2019-12-18 23:31:23,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:23,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:23,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:23,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:23,015 INFO L87 Difference]: Start difference. First operand 1048 states and 2422 transitions. Second operand 16 states. [2019-12-18 23:31:23,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:23,359 INFO L93 Difference]: Finished difference Result 1849 states and 4192 transitions. [2019-12-18 23:31:23,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 23:31:23,360 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:23,368 INFO L225 Difference]: With dead ends: 1849 [2019-12-18 23:31:23,368 INFO L226 Difference]: Without dead ends: 1642 [2019-12-18 23:31:23,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2019-12-18 23:31:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2019-12-18 23:31:23,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1093. [2019-12-18 23:31:23,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1093 states. [2019-12-18 23:31:23,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 2511 transitions. [2019-12-18 23:31:23,395 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 2511 transitions. Word has length 40 [2019-12-18 23:31:23,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:23,395 INFO L462 AbstractCegarLoop]: Abstraction has 1093 states and 2511 transitions. [2019-12-18 23:31:23,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:23,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 2511 transitions. [2019-12-18 23:31:23,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:23,397 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:23,397 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:23,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:23,601 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:23,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1738561611, now seen corresponding path program 4 times [2019-12-18 23:31:23,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:23,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956526687] [2019-12-18 23:31:23,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:23,729 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 23:31:23,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956526687] [2019-12-18 23:31:23,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450156548] [2019-12-18 23:31:23,730 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 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 23:31:23,781 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:31:23,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:23,782 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:23,783 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:23,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:23,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:23,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:23,980 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 23:31:23,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:23,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:23,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521452914] [2019-12-18 23:31:23,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:23,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:23,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:23,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:23,982 INFO L87 Difference]: Start difference. First operand 1093 states and 2511 transitions. Second operand 16 states. [2019-12-18 23:31:24,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:24,470 INFO L93 Difference]: Finished difference Result 2104 states and 4662 transitions. [2019-12-18 23:31:24,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 23:31:24,470 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:24,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:24,479 INFO L225 Difference]: With dead ends: 2104 [2019-12-18 23:31:24,480 INFO L226 Difference]: Without dead ends: 1939 [2019-12-18 23:31:24,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2019-12-18 23:31:24,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2019-12-18 23:31:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1093. [2019-12-18 23:31:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1093 states. [2019-12-18 23:31:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 2511 transitions. [2019-12-18 23:31:24,507 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 2511 transitions. Word has length 40 [2019-12-18 23:31:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:24,508 INFO L462 AbstractCegarLoop]: Abstraction has 1093 states and 2511 transitions. [2019-12-18 23:31:24,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 2511 transitions. [2019-12-18 23:31:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:24,510 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:24,510 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:24,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:24,717 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:24,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:24,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1298679733, now seen corresponding path program 5 times [2019-12-18 23:31:24,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:24,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011892877] [2019-12-18 23:31:24,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:24,914 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 23:31:24,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011892877] [2019-12-18 23:31:24,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017738482] [2019-12-18 23:31:24,915 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 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 23:31:24,964 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 23:31:24,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:24,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:24,966 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:25,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:25,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:25,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:25,082 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 23:31:25,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:25,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:25,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565999383] [2019-12-18 23:31:25,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:25,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:25,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:25,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:25,084 INFO L87 Difference]: Start difference. First operand 1093 states and 2511 transitions. Second operand 16 states. [2019-12-18 23:31:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:25,527 INFO L93 Difference]: Finished difference Result 2032 states and 4542 transitions. [2019-12-18 23:31:25,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 23:31:25,528 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:25,536 INFO L225 Difference]: With dead ends: 2032 [2019-12-18 23:31:25,536 INFO L226 Difference]: Without dead ends: 1867 [2019-12-18 23:31:25,537 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2019-12-18 23:31:25,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2019-12-18 23:31:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1093. [2019-12-18 23:31:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1093 states. [2019-12-18 23:31:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 2511 transitions. [2019-12-18 23:31:25,562 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 2511 transitions. Word has length 40 [2019-12-18 23:31:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:25,562 INFO L462 AbstractCegarLoop]: Abstraction has 1093 states and 2511 transitions. [2019-12-18 23:31:25,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 2511 transitions. [2019-12-18 23:31:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:25,564 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:25,565 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:25,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:25,768 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:25,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:25,769 INFO L82 PathProgramCache]: Analyzing trace with hash 862358426, now seen corresponding path program 6 times [2019-12-18 23:31:25,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:25,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780553771] [2019-12-18 23:31:25,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:25,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780553771] [2019-12-18 23:31:25,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306160505] [2019-12-18 23:31:25,918 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 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 23:31:26,015 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 23:31:26,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:26,017 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:26,018 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:26,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:26,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:26,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:26,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:26,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:26,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570214811] [2019-12-18 23:31:26,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:26,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:26,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:26,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:26,526 INFO L87 Difference]: Start difference. First operand 1093 states and 2511 transitions. Second operand 18 states. [2019-12-18 23:31:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:27,556 INFO L93 Difference]: Finished difference Result 2181 states and 4824 transitions. [2019-12-18 23:31:27,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 23:31:27,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:27,564 INFO L225 Difference]: With dead ends: 2181 [2019-12-18 23:31:27,565 INFO L226 Difference]: Without dead ends: 2016 [2019-12-18 23:31:27,565 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=220, Invalid=771, Unknown=1, NotChecked=0, Total=992 [2019-12-18 23:31:27,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2019-12-18 23:31:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1145. [2019-12-18 23:31:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1145 states. [2019-12-18 23:31:27,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 2644 transitions. [2019-12-18 23:31:27,592 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 2644 transitions. Word has length 44 [2019-12-18 23:31:27,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:27,592 INFO L462 AbstractCegarLoop]: Abstraction has 1145 states and 2644 transitions. [2019-12-18 23:31:27,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:27,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 2644 transitions. [2019-12-18 23:31:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:27,594 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:27,594 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:27,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:27,796 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash 872189456, now seen corresponding path program 7 times [2019-12-18 23:31:27,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:27,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313225161] [2019-12-18 23:31:27,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:27,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313225161] [2019-12-18 23:31:27,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020909629] [2019-12-18 23:31:27,956 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 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 23:31:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:28,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:28,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:28,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:28,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:28,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:28,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:28,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:28,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106211381] [2019-12-18 23:31:28,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:28,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:28,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:28,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:28,794 INFO L87 Difference]: Start difference. First operand 1145 states and 2644 transitions. Second operand 18 states. [2019-12-18 23:31:29,397 WARN L192 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-18 23:31:30,590 WARN L192 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2019-12-18 23:31:33,247 WARN L192 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-18 23:31:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:33,578 INFO L93 Difference]: Finished difference Result 2196 states and 4882 transitions. [2019-12-18 23:31:33,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 23:31:33,578 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:33,584 INFO L225 Difference]: With dead ends: 2196 [2019-12-18 23:31:33,584 INFO L226 Difference]: Without dead ends: 2031 [2019-12-18 23:31:33,585 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=219, Invalid=769, Unknown=4, NotChecked=0, Total=992 [2019-12-18 23:31:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2019-12-18 23:31:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1161. [2019-12-18 23:31:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1161 states. [2019-12-18 23:31:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2684 transitions. [2019-12-18 23:31:33,611 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2684 transitions. Word has length 44 [2019-12-18 23:31:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:33,612 INFO L462 AbstractCegarLoop]: Abstraction has 1161 states and 2684 transitions. [2019-12-18 23:31:33,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2684 transitions. [2019-12-18 23:31:33,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:33,614 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:33,614 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:33,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:33,816 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:33,817 INFO L82 PathProgramCache]: Analyzing trace with hash -667242828, now seen corresponding path program 8 times [2019-12-18 23:31:33,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:33,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473181310] [2019-12-18 23:31:33,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:33,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473181310] [2019-12-18 23:31:33,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056139362] [2019-12-18 23:31:33,973 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 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 23:31:34,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:34,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:34,044 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:34,045 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:34,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:34,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:34,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:34,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:34,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:34,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095794316] [2019-12-18 23:31:34,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:34,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:34,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:34,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:34,239 INFO L87 Difference]: Start difference. First operand 1161 states and 2684 transitions. Second operand 18 states. [2019-12-18 23:31:34,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:34,839 INFO L93 Difference]: Finished difference Result 2316 states and 5122 transitions. [2019-12-18 23:31:34,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:34,840 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:34,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:34,844 INFO L225 Difference]: With dead ends: 2316 [2019-12-18 23:31:34,844 INFO L226 Difference]: Without dead ends: 2151 [2019-12-18 23:31:34,845 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 23:31:34,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2019-12-18 23:31:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1225. [2019-12-18 23:31:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2019-12-18 23:31:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 2844 transitions. [2019-12-18 23:31:34,872 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 2844 transitions. Word has length 44 [2019-12-18 23:31:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:34,873 INFO L462 AbstractCegarLoop]: Abstraction has 1225 states and 2844 transitions. [2019-12-18 23:31:34,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:34,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 2844 transitions. [2019-12-18 23:31:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:34,875 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:34,875 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:35,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:35,076 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:35,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:35,076 INFO L82 PathProgramCache]: Analyzing trace with hash 119029354, now seen corresponding path program 9 times [2019-12-18 23:31:35,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:35,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614153383] [2019-12-18 23:31:35,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:35,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614153383] [2019-12-18 23:31:35,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966461742] [2019-12-18 23:31:35,257 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 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 23:31:35,305 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 23:31:35,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:35,306 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-18 23:31:35,307 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:35,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:35,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:35,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:35,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:35,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-12-18 23:31:35,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634744928] [2019-12-18 23:31:35,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-18 23:31:35,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:35,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-18 23:31:35,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-12-18 23:31:35,475 INFO L87 Difference]: Start difference. First operand 1225 states and 2844 transitions. Second operand 19 states. [2019-12-18 23:31:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:35,971 INFO L93 Difference]: Finished difference Result 2280 states and 5069 transitions. [2019-12-18 23:31:35,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 23:31:35,971 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2019-12-18 23:31:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:35,975 INFO L225 Difference]: With dead ends: 2280 [2019-12-18 23:31:35,975 INFO L226 Difference]: Without dead ends: 2115 [2019-12-18 23:31:35,976 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 23:31:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2019-12-18 23:31:36,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1245. [2019-12-18 23:31:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1245 states. [2019-12-18 23:31:36,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 2897 transitions. [2019-12-18 23:31:36,004 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 2897 transitions. Word has length 44 [2019-12-18 23:31:36,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:36,005 INFO L462 AbstractCegarLoop]: Abstraction has 1245 states and 2897 transitions. [2019-12-18 23:31:36,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-18 23:31:36,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 2897 transitions. [2019-12-18 23:31:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:36,007 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:36,007 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:36,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:36,219 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:36,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1538532936, now seen corresponding path program 10 times [2019-12-18 23:31:36,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:36,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067851029] [2019-12-18 23:31:36,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:36,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067851029] [2019-12-18 23:31:36,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306442219] [2019-12-18 23:31:36,387 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 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 23:31:36,436 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:31:36,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:36,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:36,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:36,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:36,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:36,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:36,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:36,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:36,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336487541] [2019-12-18 23:31:36,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:36,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:36,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:36,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:36,577 INFO L87 Difference]: Start difference. First operand 1245 states and 2897 transitions. Second operand 18 states. [2019-12-18 23:31:37,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:37,155 INFO L93 Difference]: Finished difference Result 2119 states and 4727 transitions. [2019-12-18 23:31:37,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:37,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:37,160 INFO L225 Difference]: With dead ends: 2119 [2019-12-18 23:31:37,161 INFO L226 Difference]: Without dead ends: 1954 [2019-12-18 23:31:37,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 23:31:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2019-12-18 23:31:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1204. [2019-12-18 23:31:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1204 states. [2019-12-18 23:31:37,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 2802 transitions. [2019-12-18 23:31:37,188 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 2802 transitions. Word has length 44 [2019-12-18 23:31:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:37,188 INFO L462 AbstractCegarLoop]: Abstraction has 1204 states and 2802 transitions. [2019-12-18 23:31:37,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 2802 transitions. [2019-12-18 23:31:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:37,191 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:37,191 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:37,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:37,394 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:37,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:37,395 INFO L82 PathProgramCache]: Analyzing trace with hash -498485436, now seen corresponding path program 11 times [2019-12-18 23:31:37,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:37,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133102976] [2019-12-18 23:31:37,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:37,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133102976] [2019-12-18 23:31:37,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943646880] [2019-12-18 23:31:37,535 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 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 23:31:37,582 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 23:31:37,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:37,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:37,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:38,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:38,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:38,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:38,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:38,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:38,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993485815] [2019-12-18 23:31:38,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:38,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:38,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:38,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:38,578 INFO L87 Difference]: Start difference. First operand 1204 states and 2802 transitions. Second operand 18 states. [2019-12-18 23:31:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:40,585 INFO L93 Difference]: Finished difference Result 2460 states and 5451 transitions. [2019-12-18 23:31:40,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 23:31:40,586 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:40,595 INFO L225 Difference]: With dead ends: 2460 [2019-12-18 23:31:40,595 INFO L226 Difference]: Without dead ends: 2253 [2019-12-18 23:31:40,596 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 23:31:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2019-12-18 23:31:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1283. [2019-12-18 23:31:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1283 states. [2019-12-18 23:31:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 2961 transitions. [2019-12-18 23:31:40,635 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 2961 transitions. Word has length 44 [2019-12-18 23:31:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:40,635 INFO L462 AbstractCegarLoop]: Abstraction has 1283 states and 2961 transitions. [2019-12-18 23:31:40,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 2961 transitions. [2019-12-18 23:31:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:40,638 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:40,638 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:40,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:40,849 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash 277955716, now seen corresponding path program 12 times [2019-12-18 23:31:40,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:40,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423003100] [2019-12-18 23:31:40,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:41,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423003100] [2019-12-18 23:31:41,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460418345] [2019-12-18 23:31:41,003 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 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 23:31:41,048 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 23:31:41,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:41,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:41,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:41,607 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_47 Int)) (and (<= c_~j~0 (+ (* 2 v_~i~0_47) 2)) (<= c_~i~0 (+ c_~j~0 v_~i~0_47)) (<= (div (+ (* v_~i~0_47 (- 1)) 1) (- 2)) 2))) is different from true [2019-12-18 23:31:41,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:41,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:41,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:41,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:41,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:41,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548322288] [2019-12-18 23:31:41,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:41,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:41,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:41,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=212, Unknown=1, NotChecked=30, Total=306 [2019-12-18 23:31:41,624 INFO L87 Difference]: Start difference. First operand 1283 states and 2961 transitions. Second operand 18 states. [2019-12-18 23:31:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:43,402 INFO L93 Difference]: Finished difference Result 2258 states and 4989 transitions. [2019-12-18 23:31:43,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 23:31:43,403 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:43,407 INFO L225 Difference]: With dead ends: 2258 [2019-12-18 23:31:43,407 INFO L226 Difference]: Without dead ends: 2151 [2019-12-18 23:31:43,408 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=281, Invalid=911, Unknown=2, NotChecked=66, Total=1260 [2019-12-18 23:31:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2019-12-18 23:31:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1348. [2019-12-18 23:31:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1348 states. [2019-12-18 23:31:43,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 3124 transitions. [2019-12-18 23:31:43,438 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 3124 transitions. Word has length 44 [2019-12-18 23:31:43,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:43,438 INFO L462 AbstractCegarLoop]: Abstraction has 1348 states and 3124 transitions. [2019-12-18 23:31:43,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:43,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 3124 transitions. [2019-12-18 23:31:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:43,445 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:43,445 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:43,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:43,649 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1525850638, now seen corresponding path program 13 times [2019-12-18 23:31:43,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:43,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096366401] [2019-12-18 23:31:43,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:43,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096366401] [2019-12-18 23:31:43,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987443039] [2019-12-18 23:31:43,791 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 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 23:31:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:43,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:43,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:43,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:43,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:43,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:43,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:43,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:43,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681369975] [2019-12-18 23:31:43,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:43,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:43,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:43,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:43,974 INFO L87 Difference]: Start difference. First operand 1348 states and 3124 transitions. Second operand 18 states. [2019-12-18 23:31:44,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:44,767 INFO L93 Difference]: Finished difference Result 2838 states and 6252 transitions. [2019-12-18 23:31:44,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:31:44,768 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:44,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:44,771 INFO L225 Difference]: With dead ends: 2838 [2019-12-18 23:31:44,771 INFO L226 Difference]: Without dead ends: 2566 [2019-12-18 23:31:44,772 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2019-12-18 23:31:44,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2019-12-18 23:31:44,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 1440. [2019-12-18 23:31:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1440 states. [2019-12-18 23:31:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 3344 transitions. [2019-12-18 23:31:44,799 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 3344 transitions. Word has length 44 [2019-12-18 23:31:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:44,799 INFO L462 AbstractCegarLoop]: Abstraction has 1440 states and 3344 transitions. [2019-12-18 23:31:44,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 3344 transitions. [2019-12-18 23:31:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:44,802 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:44,802 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:45,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:45,005 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:45,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:45,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1535681668, now seen corresponding path program 14 times [2019-12-18 23:31:45,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:45,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715988419] [2019-12-18 23:31:45,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:45,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715988419] [2019-12-18 23:31:45,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714957975] [2019-12-18 23:31:45,156 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 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 23:31:45,198 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:45,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:45,200 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:45,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:45,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:45,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:45,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:45,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:45,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637357317] [2019-12-18 23:31:45,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:45,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:45,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:45,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:45,320 INFO L87 Difference]: Start difference. First operand 1440 states and 3344 transitions. Second operand 18 states. [2019-12-18 23:31:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:45,891 INFO L93 Difference]: Finished difference Result 2744 states and 6052 transitions. [2019-12-18 23:31:45,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-18 23:31:45,896 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:45,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:45,899 INFO L225 Difference]: With dead ends: 2744 [2019-12-18 23:31:45,899 INFO L226 Difference]: Without dead ends: 2579 [2019-12-18 23:31:45,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 23:31:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2019-12-18 23:31:45,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 1424. [2019-12-18 23:31:45,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1424 states. [2019-12-18 23:31:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3304 transitions. [2019-12-18 23:31:45,925 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3304 transitions. Word has length 44 [2019-12-18 23:31:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:45,925 INFO L462 AbstractCegarLoop]: Abstraction has 1424 states and 3304 transitions. [2019-12-18 23:31:45,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3304 transitions. [2019-12-18 23:31:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:45,928 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:45,928 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:46,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:46,131 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:46,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:46,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1774356104, now seen corresponding path program 15 times [2019-12-18 23:31:46,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:46,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680121077] [2019-12-18 23:31:46,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:46,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680121077] [2019-12-18 23:31:46,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284818998] [2019-12-18 23:31:46,278 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 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 23:31:46,325 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 23:31:46,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:46,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:46,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:46,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:46,486 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:46,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:46,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:46,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:46,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099560762] [2019-12-18 23:31:46,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:46,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:46,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:46,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:46,519 INFO L87 Difference]: Start difference. First operand 1424 states and 3304 transitions. Second operand 18 states. [2019-12-18 23:31:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:48,114 INFO L93 Difference]: Finished difference Result 2756 states and 6072 transitions. [2019-12-18 23:31:48,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 23:31:48,114 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:48,118 INFO L225 Difference]: With dead ends: 2756 [2019-12-18 23:31:48,118 INFO L226 Difference]: Without dead ends: 2591 [2019-12-18 23:31:48,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=988, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 23:31:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2019-12-18 23:31:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1424. [2019-12-18 23:31:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1424 states. [2019-12-18 23:31:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3304 transitions. [2019-12-18 23:31:48,141 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3304 transitions. Word has length 44 [2019-12-18 23:31:48,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:48,141 INFO L462 AbstractCegarLoop]: Abstraction has 1424 states and 3304 transitions. [2019-12-18 23:31:48,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3304 transitions. [2019-12-18 23:31:48,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:48,143 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:48,143 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:48,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:48,345 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:48,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2044042436, now seen corresponding path program 16 times [2019-12-18 23:31:48,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:48,346 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090770088] [2019-12-18 23:31:48,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:48,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090770088] [2019-12-18 23:31:48,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140507881] [2019-12-18 23:31:48,521 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 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 23:31:48,566 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:31:48,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:48,567 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:48,569 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:48,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:48,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:48,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:48,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:48,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:48,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154185743] [2019-12-18 23:31:48,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:48,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:48,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:48,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:48,777 INFO L87 Difference]: Start difference. First operand 1424 states and 3304 transitions. Second operand 18 states. [2019-12-18 23:31:49,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:49,581 INFO L93 Difference]: Finished difference Result 2563 states and 5669 transitions. [2019-12-18 23:31:49,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-18 23:31:49,582 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:49,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:49,585 INFO L225 Difference]: With dead ends: 2563 [2019-12-18 23:31:49,586 INFO L226 Difference]: Without dead ends: 2398 [2019-12-18 23:31:49,587 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=1043, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 23:31:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2019-12-18 23:31:49,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1408. [2019-12-18 23:31:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1408 states. [2019-12-18 23:31:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 3264 transitions. [2019-12-18 23:31:49,605 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 3264 transitions. Word has length 44 [2019-12-18 23:31:49,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:49,605 INFO L462 AbstractCegarLoop]: Abstraction has 1408 states and 3264 transitions. [2019-12-18 23:31:49,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 3264 transitions. [2019-12-18 23:31:49,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:49,607 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:49,607 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:49,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:49,810 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:49,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:49,811 INFO L82 PathProgramCache]: Analyzing trace with hash -989070626, now seen corresponding path program 17 times [2019-12-18 23:31:49,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:49,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289237019] [2019-12-18 23:31:49,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:49,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289237019] [2019-12-18 23:31:49,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113610503] [2019-12-18 23:31:49,979 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 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 23:31:50,028 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 23:31:50,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:50,029 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:50,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:50,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:50,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:50,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:50,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:50,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:50,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932368294] [2019-12-18 23:31:50,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:50,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:50,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:50,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:50,164 INFO L87 Difference]: Start difference. First operand 1408 states and 3264 transitions. Second operand 18 states. [2019-12-18 23:31:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:50,801 INFO L93 Difference]: Finished difference Result 2697 states and 5959 transitions. [2019-12-18 23:31:50,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 23:31:50,802 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:50,805 INFO L225 Difference]: With dead ends: 2697 [2019-12-18 23:31:50,805 INFO L226 Difference]: Without dead ends: 2532 [2019-12-18 23:31:50,806 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 23:31:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2019-12-18 23:31:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1418. [2019-12-18 23:31:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1418 states. [2019-12-18 23:31:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 3268 transitions. [2019-12-18 23:31:50,827 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 3268 transitions. Word has length 44 [2019-12-18 23:31:50,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:50,827 INFO L462 AbstractCegarLoop]: Abstraction has 1418 states and 3268 transitions. [2019-12-18 23:31:50,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:50,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 3268 transitions. [2019-12-18 23:31:50,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:50,830 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:50,830 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:51,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:51,034 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:51,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:51,034 INFO L82 PathProgramCache]: Analyzing trace with hash 547964112, now seen corresponding path program 3 times [2019-12-18 23:31:51,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:51,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960383467] [2019-12-18 23:31:51,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:51,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960383467] [2019-12-18 23:31:51,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394695447] [2019-12-18 23:31:51,203 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:51,250 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-18 23:31:51,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:51,251 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:51,252 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:51,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:51,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:51,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:51,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:51,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586605121] [2019-12-18 23:31:51,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:51,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:51,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:51,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:51,384 INFO L87 Difference]: Start difference. First operand 1418 states and 3268 transitions. Second operand 18 states. [2019-12-18 23:31:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:51,978 INFO L93 Difference]: Finished difference Result 2522 states and 5614 transitions. [2019-12-18 23:31:51,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-18 23:31:51,979 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:51,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:51,982 INFO L225 Difference]: With dead ends: 2522 [2019-12-18 23:31:51,983 INFO L226 Difference]: Without dead ends: 2357 [2019-12-18 23:31:51,984 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 23:31:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2019-12-18 23:31:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 1422. [2019-12-18 23:31:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1422 states. [2019-12-18 23:31:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 3281 transitions. [2019-12-18 23:31:52,011 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 3281 transitions. Word has length 44 [2019-12-18 23:31:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:52,011 INFO L462 AbstractCegarLoop]: Abstraction has 1422 states and 3281 transitions. [2019-12-18 23:31:52,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 3281 transitions. [2019-12-18 23:31:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:31:52,014 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:52,014 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:52,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:52,217 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:52,220 INFO L82 PathProgramCache]: Analyzing trace with hash 812542907, now seen corresponding path program 18 times [2019-12-18 23:31:52,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:52,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102892936] [2019-12-18 23:31:52,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:52,512 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 23:31:52,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102892936] [2019-12-18 23:31:52,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695081417] [2019-12-18 23:31:52,513 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 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 23:31:52,600 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 23:31:52,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:52,602 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:31:52,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:52,816 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:52,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:52,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:52,828 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 23:31:52,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:52,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:31:52,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814642080] [2019-12-18 23:31:52,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:31:52,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:52,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:31:52,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:31:52,830 INFO L87 Difference]: Start difference. First operand 1422 states and 3281 transitions. Second operand 20 states. [2019-12-18 23:31:53,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:53,358 INFO L93 Difference]: Finished difference Result 2515 states and 5596 transitions. [2019-12-18 23:31:53,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 23:31:53,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:31:53,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:53,362 INFO L225 Difference]: With dead ends: 2515 [2019-12-18 23:31:53,362 INFO L226 Difference]: Without dead ends: 2350 [2019-12-18 23:31:53,363 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 23:31:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2019-12-18 23:31:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1438. [2019-12-18 23:31:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2019-12-18 23:31:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 3321 transitions. [2019-12-18 23:31:53,390 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 3321 transitions. Word has length 48 [2019-12-18 23:31:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:53,391 INFO L462 AbstractCegarLoop]: Abstraction has 1438 states and 3321 transitions. [2019-12-18 23:31:53,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:31:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 3321 transitions. [2019-12-18 23:31:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:31:53,393 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:53,393 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:53,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:53,597 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:53,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1572142739, now seen corresponding path program 19 times [2019-12-18 23:31:53,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:53,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885167264] [2019-12-18 23:31:53,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:53,765 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 23:31:53,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885167264] [2019-12-18 23:31:53,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193828590] [2019-12-18 23:31:53,766 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 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 23:31:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:53,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:31:53,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:56,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:56,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:56,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:56,781 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 23:31:56,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:56,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:31:56,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968393138] [2019-12-18 23:31:56,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:31:56,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:56,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:31:56,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=294, Unknown=4, NotChecked=0, Total=380 [2019-12-18 23:31:56,782 INFO L87 Difference]: Start difference. First operand 1438 states and 3321 transitions. Second operand 20 states. [2019-12-18 23:31:58,622 WARN L192 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-18 23:32:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:04,833 INFO L93 Difference]: Finished difference Result 2859 states and 6276 transitions. [2019-12-18 23:32:04,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-18 23:32:04,833 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:04,837 INFO L225 Difference]: With dead ends: 2859 [2019-12-18 23:32:04,837 INFO L226 Difference]: Without dead ends: 2694 [2019-12-18 23:32:04,838 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=310, Invalid=1090, Unknown=6, NotChecked=0, Total=1406 [2019-12-18 23:32:04,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2694 states. [2019-12-18 23:32:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2694 to 1511. [2019-12-18 23:32:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1511 states. [2019-12-18 23:32:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 3496 transitions. [2019-12-18 23:32:04,857 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 3496 transitions. Word has length 48 [2019-12-18 23:32:04,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:04,858 INFO L462 AbstractCegarLoop]: Abstraction has 1511 states and 3496 transitions. [2019-12-18 23:32:04,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:04,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 3496 transitions. [2019-12-18 23:32:04,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:04,859 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:04,859 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:05,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:05,060 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:05,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:05,061 INFO L82 PathProgramCache]: Analyzing trace with hash -795701587, now seen corresponding path program 20 times [2019-12-18 23:32:05,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:05,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034837343] [2019-12-18 23:32:05,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:05,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034837343] [2019-12-18 23:32:05,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842526011] [2019-12-18 23:32:05,223 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 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 23:32:05,267 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:32:05,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:05,268 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:05,269 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:09,512 WARN L192 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 23:32:15,619 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:15,619 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:15,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:15,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:15,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:15,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601546939] [2019-12-18 23:32:15,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:15,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:15,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:15,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=296, Unknown=2, NotChecked=0, Total=380 [2019-12-18 23:32:15,632 INFO L87 Difference]: Start difference. First operand 1511 states and 3496 transitions. Second operand 20 states. [2019-12-18 23:32:19,848 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2019-12-18 23:32:23,977 WARN L192 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-18 23:32:24,273 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-18 23:32:24,934 WARN L192 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 23:33:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:01,178 INFO L93 Difference]: Finished difference Result 2958 states and 6539 transitions. [2019-12-18 23:33:01,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:33:01,179 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:01,181 INFO L225 Difference]: With dead ends: 2958 [2019-12-18 23:33:01,182 INFO L226 Difference]: Without dead ends: 2686 [2019-12-18 23:33:01,183 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=365, Invalid=1428, Unknown=13, NotChecked=0, Total=1806 [2019-12-18 23:33:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2019-12-18 23:33:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1535. [2019-12-18 23:33:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1535 states. [2019-12-18 23:33:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 3543 transitions. [2019-12-18 23:33:01,202 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 3543 transitions. Word has length 48 [2019-12-18 23:33:01,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:01,202 INFO L462 AbstractCegarLoop]: Abstraction has 1535 states and 3543 transitions. [2019-12-18 23:33:01,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:01,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 3543 transitions. [2019-12-18 23:33:01,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:01,204 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:01,204 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:01,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:01,407 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:01,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1413216377, now seen corresponding path program 21 times [2019-12-18 23:33:01,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:01,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011082258] [2019-12-18 23:33:01,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:01,580 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 23:33:01,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011082258] [2019-12-18 23:33:01,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758157968] [2019-12-18 23:33:01,580 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 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 23:33:01,629 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 23:33:01,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:01,630 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:33:01,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:01,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:01,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:01,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:01,859 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 23:33:01,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:01,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:01,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346579906] [2019-12-18 23:33:01,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:01,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:01,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:01,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:01,861 INFO L87 Difference]: Start difference. First operand 1535 states and 3543 transitions. Second operand 20 states. [2019-12-18 23:33:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:02,801 INFO L93 Difference]: Finished difference Result 2995 states and 6589 transitions. [2019-12-18 23:33:02,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-18 23:33:02,802 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:02,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:02,806 INFO L225 Difference]: With dead ends: 2995 [2019-12-18 23:33:02,806 INFO L226 Difference]: Without dead ends: 2830 [2019-12-18 23:33:02,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2019-12-18 23:33:02,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2019-12-18 23:33:02,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 1551. [2019-12-18 23:33:02,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1551 states. [2019-12-18 23:33:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3583 transitions. [2019-12-18 23:33:02,826 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3583 transitions. Word has length 48 [2019-12-18 23:33:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:02,827 INFO L462 AbstractCegarLoop]: Abstraction has 1551 states and 3583 transitions. [2019-12-18 23:33:02,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3583 transitions. [2019-12-18 23:33:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:02,828 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:02,829 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:03,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:03,029 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:03,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:03,030 INFO L82 PathProgramCache]: Analyzing trace with hash -636775225, now seen corresponding path program 22 times [2019-12-18 23:33:03,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:03,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600627438] [2019-12-18 23:33:03,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:03,190 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 23:33:03,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600627438] [2019-12-18 23:33:03,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162730737] [2019-12-18 23:33:03,191 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 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 23:33:03,240 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:33:03,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:03,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:03,242 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:07,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:07,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:07,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:07,754 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 23:33:07,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:07,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:07,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169725021] [2019-12-18 23:33:07,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:07,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:07,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:07,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:07,756 INFO L87 Difference]: Start difference. First operand 1551 states and 3583 transitions. Second operand 20 states. [2019-12-18 23:33:15,361 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2019-12-18 23:33:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:19,806 INFO L93 Difference]: Finished difference Result 3088 states and 6791 transitions. [2019-12-18 23:33:19,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 23:33:19,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:19,810 INFO L225 Difference]: With dead ends: 3088 [2019-12-18 23:33:19,810 INFO L226 Difference]: Without dead ends: 2923 [2019-12-18 23:33:19,811 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=322, Invalid=1158, Unknown=2, NotChecked=0, Total=1482 [2019-12-18 23:33:19,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2019-12-18 23:33:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 1582. [2019-12-18 23:33:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1582 states. [2019-12-18 23:33:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3660 transitions. [2019-12-18 23:33:19,832 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3660 transitions. Word has length 48 [2019-12-18 23:33:19,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:19,832 INFO L462 AbstractCegarLoop]: Abstraction has 1582 states and 3660 transitions. [2019-12-18 23:33:19,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3660 transitions. [2019-12-18 23:33:19,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:19,834 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:19,834 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:20,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:20,035 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:20,035 INFO L82 PathProgramCache]: Analyzing trace with hash -820210003, now seen corresponding path program 23 times [2019-12-18 23:33:20,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:20,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85963836] [2019-12-18 23:33:20,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:20,256 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 23:33:20,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85963836] [2019-12-18 23:33:20,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838121472] [2019-12-18 23:33:20,257 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 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 23:33:20,309 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 23:33:20,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:20,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:20,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:20,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:20,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:20,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:20,785 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 23:33:20,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:20,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:20,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474007891] [2019-12-18 23:33:20,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:20,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:20,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:20,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:20,787 INFO L87 Difference]: Start difference. First operand 1582 states and 3660 transitions. Second operand 20 states. [2019-12-18 23:33:21,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:21,929 INFO L93 Difference]: Finished difference Result 3012 states and 6616 transitions. [2019-12-18 23:33:21,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 23:33:21,929 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:21,933 INFO L225 Difference]: With dead ends: 3012 [2019-12-18 23:33:21,934 INFO L226 Difference]: Without dead ends: 2847 [2019-12-18 23:33:21,934 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=326, Invalid=1156, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 23:33:21,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2019-12-18 23:33:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 1582. [2019-12-18 23:33:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1582 states. [2019-12-18 23:33:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3660 transitions. [2019-12-18 23:33:21,975 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3660 transitions. Word has length 48 [2019-12-18 23:33:21,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:21,975 INFO L462 AbstractCegarLoop]: Abstraction has 1582 states and 3660 transitions. [2019-12-18 23:33:21,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3660 transitions. [2019-12-18 23:33:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:21,977 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:21,977 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:22,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:22,178 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:22,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:22,179 INFO L82 PathProgramCache]: Analyzing trace with hash 620950727, now seen corresponding path program 24 times [2019-12-18 23:33:22,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:22,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136392748] [2019-12-18 23:33:22,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:22,340 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 23:33:22,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136392748] [2019-12-18 23:33:22,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087090251] [2019-12-18 23:33:22,340 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 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 23:33:22,388 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 23:33:22,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:22,389 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:22,389 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:22,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:22,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:22,673 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:22,682 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 23:33:22,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:22,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:22,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666286758] [2019-12-18 23:33:22,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:22,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:22,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:22,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:22,683 INFO L87 Difference]: Start difference. First operand 1582 states and 3660 transitions. Second operand 20 states. [2019-12-18 23:33:23,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:23,896 INFO L93 Difference]: Finished difference Result 2903 states and 6421 transitions. [2019-12-18 23:33:23,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-18 23:33:23,897 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:23,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:23,900 INFO L225 Difference]: With dead ends: 2903 [2019-12-18 23:33:23,900 INFO L226 Difference]: Without dead ends: 2738 [2019-12-18 23:33:23,901 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=309, Invalid=1097, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 23:33:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2019-12-18 23:33:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 1582. [2019-12-18 23:33:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1582 states. [2019-12-18 23:33:23,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3660 transitions. [2019-12-18 23:33:23,921 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3660 transitions. Word has length 48 [2019-12-18 23:33:23,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:23,921 INFO L462 AbstractCegarLoop]: Abstraction has 1582 states and 3660 transitions. [2019-12-18 23:33:23,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3660 transitions. [2019-12-18 23:33:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:23,922 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:23,923 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:24,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:24,123 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:24,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1507693013, now seen corresponding path program 25 times [2019-12-18 23:33:24,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:24,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155427336] [2019-12-18 23:33:24,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:24,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155427336] [2019-12-18 23:33:24,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12038314] [2019-12-18 23:33:24,305 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 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 23:33:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:24,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:24,355 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:24,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:24,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:24,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:24,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:24,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:24,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57682343] [2019-12-18 23:33:24,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:24,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:24,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:24,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:24,555 INFO L87 Difference]: Start difference. First operand 1582 states and 3660 transitions. Second operand 20 states. [2019-12-18 23:33:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:25,249 INFO L93 Difference]: Finished difference Result 2887 states and 6416 transitions. [2019-12-18 23:33:25,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 23:33:25,250 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:25,254 INFO L225 Difference]: With dead ends: 2887 [2019-12-18 23:33:25,254 INFO L226 Difference]: Without dead ends: 2680 [2019-12-18 23:33:25,255 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 23:33:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2019-12-18 23:33:25,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1651. [2019-12-18 23:33:25,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1651 states. [2019-12-18 23:33:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 3815 transitions. [2019-12-18 23:33:25,280 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 3815 transitions. Word has length 48 [2019-12-18 23:33:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:25,280 INFO L462 AbstractCegarLoop]: Abstraction has 1651 states and 3815 transitions. [2019-12-18 23:33:25,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 3815 transitions. [2019-12-18 23:33:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:25,282 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:25,282 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:25,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:25,485 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:25,486 INFO L82 PathProgramCache]: Analyzing trace with hash 536305121, now seen corresponding path program 26 times [2019-12-18 23:33:25,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:25,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668862984] [2019-12-18 23:33:25,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:25,659 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 23:33:25,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668862984] [2019-12-18 23:33:25,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720041951] [2019-12-18 23:33:25,659 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 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 23:33:25,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:33:25,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:25,717 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:25,718 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:27,026 WARN L192 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-18 23:33:27,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:27,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:27,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:27,431 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 23:33:27,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:27,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:27,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652758926] [2019-12-18 23:33:27,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:27,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:27,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:27,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:27,433 INFO L87 Difference]: Start difference. First operand 1651 states and 3815 transitions. Second operand 20 states. [2019-12-18 23:33:29,281 WARN L192 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2019-12-18 23:33:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:30,434 INFO L93 Difference]: Finished difference Result 3339 states and 7328 transitions. [2019-12-18 23:33:30,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:33:30,434 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:30,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:30,439 INFO L225 Difference]: With dead ends: 3339 [2019-12-18 23:33:30,439 INFO L226 Difference]: Without dead ends: 3174 [2019-12-18 23:33:30,440 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=389, Invalid=1332, Unknown=1, NotChecked=0, Total=1722 [2019-12-18 23:33:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2019-12-18 23:33:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 1651. [2019-12-18 23:33:30,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1651 states. [2019-12-18 23:33:30,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 3815 transitions. [2019-12-18 23:33:30,479 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 3815 transitions. Word has length 48 [2019-12-18 23:33:30,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:30,479 INFO L462 AbstractCegarLoop]: Abstraction has 1651 states and 3815 transitions. [2019-12-18 23:33:30,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:30,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 3815 transitions. [2019-12-18 23:33:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:30,480 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:30,481 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:30,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:30,681 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:30,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1129311495, now seen corresponding path program 27 times [2019-12-18 23:33:30,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:30,683 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078232791] [2019-12-18 23:33:30,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:30,850 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 23:33:30,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078232791] [2019-12-18 23:33:30,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989961096] [2019-12-18 23:33:30,851 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 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 23:33:30,898 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 23:33:30,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:30,899 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-18 23:33:30,900 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:31,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:31,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:31,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:31,073 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 23:33:31,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:31,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:31,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363572730] [2019-12-18 23:33:31,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:31,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:31,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:31,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:31,074 INFO L87 Difference]: Start difference. First operand 1651 states and 3815 transitions. Second operand 20 states. [2019-12-18 23:33:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:32,322 INFO L93 Difference]: Finished difference Result 3112 states and 6843 transitions. [2019-12-18 23:33:32,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-18 23:33:32,326 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:32,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:32,331 INFO L225 Difference]: With dead ends: 3112 [2019-12-18 23:33:32,336 INFO L226 Difference]: Without dead ends: 2947 [2019-12-18 23:33:32,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2019-12-18 23:33:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2019-12-18 23:33:32,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 1683. [2019-12-18 23:33:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1683 states. [2019-12-18 23:33:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 3895 transitions. [2019-12-18 23:33:32,373 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 3895 transitions. Word has length 48 [2019-12-18 23:33:32,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:32,374 INFO L462 AbstractCegarLoop]: Abstraction has 1683 states and 3895 transitions. [2019-12-18 23:33:32,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:32,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 3895 transitions. [2019-12-18 23:33:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:32,376 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:32,377 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:32,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:32,580 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:32,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1604893547, now seen corresponding path program 28 times [2019-12-18 23:33:32,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:32,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823458266] [2019-12-18 23:33:32,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:32,746 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 23:33:32,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823458266] [2019-12-18 23:33:32,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256377861] [2019-12-18 23:33:32,746 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 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 23:33:32,810 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:33:32,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:32,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:32,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:32,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:32,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:32,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:32,959 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 23:33:32,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:32,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:32,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120887853] [2019-12-18 23:33:32,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:32,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:32,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:32,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:32,961 INFO L87 Difference]: Start difference. First operand 1683 states and 3895 transitions. Second operand 20 states. [2019-12-18 23:33:33,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:33,924 INFO L93 Difference]: Finished difference Result 3326 states and 7293 transitions. [2019-12-18 23:33:33,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-18 23:33:33,925 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:33,929 INFO L225 Difference]: With dead ends: 3326 [2019-12-18 23:33:33,929 INFO L226 Difference]: Without dead ends: 3161 [2019-12-18 23:33:33,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=467, Invalid=1695, Unknown=0, NotChecked=0, Total=2162 [2019-12-18 23:33:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2019-12-18 23:33:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 1679. [2019-12-18 23:33:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1679 states. [2019-12-18 23:33:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 3882 transitions. [2019-12-18 23:33:33,952 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 3882 transitions. Word has length 48 [2019-12-18 23:33:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:33,952 INFO L462 AbstractCegarLoop]: Abstraction has 1679 states and 3882 transitions. [2019-12-18 23:33:33,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:33,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 3882 transitions. [2019-12-18 23:33:33,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:33,954 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:33,954 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:34,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:34,155 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:34,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1903801567, now seen corresponding path program 29 times [2019-12-18 23:33:34,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:34,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117038837] [2019-12-18 23:33:34,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:34,412 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 23:33:34,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117038837] [2019-12-18 23:33:34,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898415208] [2019-12-18 23:33:34,413 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 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 23:33:34,491 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 23:33:34,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:34,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:34,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:34,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:34,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:34,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:34,777 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 23:33:34,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:34,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:34,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778177601] [2019-12-18 23:33:34,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:34,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:34,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:34,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:34,778 INFO L87 Difference]: Start difference. First operand 1679 states and 3882 transitions. Second operand 20 states. [2019-12-18 23:33:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:35,924 INFO L93 Difference]: Finished difference Result 3381 states and 7445 transitions. [2019-12-18 23:33:35,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-18 23:33:35,925 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:35,929 INFO L225 Difference]: With dead ends: 3381 [2019-12-18 23:33:35,929 INFO L226 Difference]: Without dead ends: 3216 [2019-12-18 23:33:35,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=427, Invalid=1553, Unknown=0, NotChecked=0, Total=1980 [2019-12-18 23:33:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3216 states. [2019-12-18 23:33:35,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3216 to 1699. [2019-12-18 23:33:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2019-12-18 23:33:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3935 transitions. [2019-12-18 23:33:35,952 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3935 transitions. Word has length 48 [2019-12-18 23:33:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:35,952 INFO L462 AbstractCegarLoop]: Abstraction has 1699 states and 3935 transitions. [2019-12-18 23:33:35,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3935 transitions. [2019-12-18 23:33:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:35,954 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:35,954 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:36,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:36,155 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:36,156 INFO L82 PathProgramCache]: Analyzing trace with hash -16365061, now seen corresponding path program 30 times [2019-12-18 23:33:36,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:36,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131637188] [2019-12-18 23:33:36,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:36,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131637188] [2019-12-18 23:33:36,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841141806] [2019-12-18 23:33:36,348 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 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 23:33:36,431 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 23:33:36,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:36,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:36,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:36,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:36,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:36,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:36,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:36,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:36,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685659297] [2019-12-18 23:33:36,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:36,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:36,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:36,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:36,738 INFO L87 Difference]: Start difference. First operand 1699 states and 3935 transitions. Second operand 20 states. [2019-12-18 23:33:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:37,849 INFO L93 Difference]: Finished difference Result 3090 states and 6793 transitions. [2019-12-18 23:33:37,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 23:33:37,849 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:37,853 INFO L225 Difference]: With dead ends: 3090 [2019-12-18 23:33:37,853 INFO L226 Difference]: Without dead ends: 2925 [2019-12-18 23:33:37,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 23:33:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2019-12-18 23:33:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 1715. [2019-12-18 23:33:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1715 states. [2019-12-18 23:33:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 3975 transitions. [2019-12-18 23:33:37,900 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 3975 transitions. Word has length 48 [2019-12-18 23:33:37,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:37,900 INFO L462 AbstractCegarLoop]: Abstraction has 1715 states and 3975 transitions. [2019-12-18 23:33:37,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:37,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 3975 transitions. [2019-12-18 23:33:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:37,903 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:37,903 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:38,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:38,107 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:38,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:38,107 INFO L82 PathProgramCache]: Analyzing trace with hash -199799839, now seen corresponding path program 4 times [2019-12-18 23:33:38,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:38,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603551777] [2019-12-18 23:33:38,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:38,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603551777] [2019-12-18 23:33:38,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374667575] [2019-12-18 23:33:38,316 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 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 23:33:38,389 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:33:38,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:38,390 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:38,392 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:41,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:41,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:41,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:41,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:41,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:41,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962535559] [2019-12-18 23:33:41,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:41,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:41,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:41,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=297, Unknown=2, NotChecked=0, Total=380 [2019-12-18 23:33:41,404 INFO L87 Difference]: Start difference. First operand 1715 states and 3975 transitions. Second operand 20 states. [2019-12-18 23:33:42,099 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2019-12-18 23:33:44,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:44,311 INFO L93 Difference]: Finished difference Result 3025 states and 6691 transitions. [2019-12-18 23:33:44,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 23:33:44,311 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:44,315 INFO L225 Difference]: With dead ends: 3025 [2019-12-18 23:33:44,316 INFO L226 Difference]: Without dead ends: 2860 [2019-12-18 23:33:44,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=332, Invalid=1147, Unknown=3, NotChecked=0, Total=1482 [2019-12-18 23:33:44,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2019-12-18 23:33:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1699. [2019-12-18 23:33:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2019-12-18 23:33:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3935 transitions. [2019-12-18 23:33:44,339 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3935 transitions. Word has length 48 [2019-12-18 23:33:44,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:44,339 INFO L462 AbstractCegarLoop]: Abstraction has 1699 states and 3935 transitions. [2019-12-18 23:33:44,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:44,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3935 transitions. [2019-12-18 23:33:44,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:44,341 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:44,341 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:44,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:44,541 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:44,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:44,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2017802043, now seen corresponding path program 31 times [2019-12-18 23:33:44,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:44,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640792153] [2019-12-18 23:33:44,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:44,719 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 23:33:44,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640792153] [2019-12-18 23:33:44,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527595913] [2019-12-18 23:33:44,719 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 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 23:33:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:44,768 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:44,769 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:47,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:47,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:47,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:47,214 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 23:33:47,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:47,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:47,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146654869] [2019-12-18 23:33:47,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:47,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:47,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:47,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:47,216 INFO L87 Difference]: Start difference. First operand 1699 states and 3935 transitions. Second operand 20 states. [2019-12-18 23:33:48,909 WARN L192 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2019-12-18 23:33:50,247 WARN L192 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2019-12-18 23:33:54,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:54,423 INFO L93 Difference]: Finished difference Result 3147 states and 6935 transitions. [2019-12-18 23:33:54,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-18 23:33:54,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:54,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:54,428 INFO L225 Difference]: With dead ends: 3147 [2019-12-18 23:33:54,428 INFO L226 Difference]: Without dead ends: 2982 [2019-12-18 23:33:54,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=383, Invalid=1413, Unknown=10, NotChecked=0, Total=1806 [2019-12-18 23:33:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2019-12-18 23:33:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1699. [2019-12-18 23:33:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2019-12-18 23:33:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3935 transitions. [2019-12-18 23:33:54,460 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3935 transitions. Word has length 48 [2019-12-18 23:33:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:54,461 INFO L462 AbstractCegarLoop]: Abstraction has 1699 states and 3935 transitions. [2019-12-18 23:33:54,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:54,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3935 transitions. [2019-12-18 23:33:54,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:54,463 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:54,463 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:54,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:54,666 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:54,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1382180575, now seen corresponding path program 32 times [2019-12-18 23:33:54,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:54,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525550043] [2019-12-18 23:33:54,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:54,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525550043] [2019-12-18 23:33:54,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605055063] [2019-12-18 23:33:54,827 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 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 23:33:54,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:33:54,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:54,875 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:54,876 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:55,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:55,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:55,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:55,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:55,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:55,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212836992] [2019-12-18 23:33:55,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:55,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:55,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:55,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:55,232 INFO L87 Difference]: Start difference. First operand 1699 states and 3935 transitions. Second operand 20 states. [2019-12-18 23:33:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:56,239 INFO L93 Difference]: Finished difference Result 3359 states and 7355 transitions. [2019-12-18 23:33:56,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-18 23:33:56,240 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:56,244 INFO L225 Difference]: With dead ends: 3359 [2019-12-18 23:33:56,244 INFO L226 Difference]: Without dead ends: 3194 [2019-12-18 23:33:56,245 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=361, Invalid=1279, Unknown=0, NotChecked=0, Total=1640 [2019-12-18 23:33:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2019-12-18 23:33:56,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 1699. [2019-12-18 23:33:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2019-12-18 23:33:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3935 transitions. [2019-12-18 23:33:56,267 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3935 transitions. Word has length 48 [2019-12-18 23:33:56,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:56,267 INFO L462 AbstractCegarLoop]: Abstraction has 1699 states and 3935 transitions. [2019-12-18 23:33:56,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:56,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3935 transitions. [2019-12-18 23:33:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:56,269 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:56,269 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:56,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:56,470 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash -980552507, now seen corresponding path program 33 times [2019-12-18 23:33:56,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:56,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465531171] [2019-12-18 23:33:56,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:56,642 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 23:33:56,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465531171] [2019-12-18 23:33:56,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347604826] [2019-12-18 23:33:56,642 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 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 23:33:56,732 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 23:33:56,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:56,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:56,735 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:58,073 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_134 Int)) (and (<= c_~i~0 (+ (* 2 v_~i~0_134) 3)) (<= c_~j~0 (+ v_~i~0_134 c_~i~0 3)) (<= (div (+ (* v_~i~0_134 (- 1)) 2) (- 2)) 3))) is different from true [2019-12-18 23:33:58,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:58,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:58,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:58,083 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 23:33:58,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:58,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:58,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813683253] [2019-12-18 23:33:58,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:58,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:58,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:58,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=267, Unknown=1, NotChecked=34, Total=380 [2019-12-18 23:33:58,084 INFO L87 Difference]: Start difference. First operand 1699 states and 3935 transitions. Second operand 20 states. [2019-12-18 23:34:01,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:01,836 INFO L93 Difference]: Finished difference Result 3002 states and 6654 transitions. [2019-12-18 23:34:01,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-18 23:34:01,837 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:34:01,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:01,841 INFO L225 Difference]: With dead ends: 3002 [2019-12-18 23:34:01,841 INFO L226 Difference]: Without dead ends: 2895 [2019-12-18 23:34:01,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=389, Invalid=1253, Unknown=2, NotChecked=78, Total=1722 [2019-12-18 23:34:01,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2019-12-18 23:34:01,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 1716. [2019-12-18 23:34:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2019-12-18 23:34:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 3978 transitions. [2019-12-18 23:34:01,863 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 3978 transitions. Word has length 48 [2019-12-18 23:34:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:01,863 INFO L462 AbstractCegarLoop]: Abstraction has 1716 states and 3978 transitions. [2019-12-18 23:34:01,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:34:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 3978 transitions. [2019-12-18 23:34:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:34:01,864 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:01,865 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:02,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:02,066 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:02,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:02,067 INFO L82 PathProgramCache]: Analyzing trace with hash 453238255, now seen corresponding path program 34 times [2019-12-18 23:34:02,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:02,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917872992] [2019-12-18 23:34:02,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:02,266 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 23:34:02,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917872992] [2019-12-18 23:34:02,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526815486] [2019-12-18 23:34:02,266 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 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 23:34:02,326 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:34:02,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:02,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:34:02,328 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:02,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:02,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:02,483 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 23:34:02,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:02,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:34:02,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622014780] [2019-12-18 23:34:02,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:34:02,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:02,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:34:02,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:34:02,485 INFO L87 Difference]: Start difference. First operand 1716 states and 3978 transitions. Second operand 20 states. [2019-12-18 23:34:03,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:03,181 INFO L93 Difference]: Finished difference Result 3376 states and 7459 transitions. [2019-12-18 23:34:03,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-18 23:34:03,182 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:34:03,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:03,186 INFO L225 Difference]: With dead ends: 3376 [2019-12-18 23:34:03,187 INFO L226 Difference]: Without dead ends: 3211 [2019-12-18 23:34:03,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=369, Invalid=1271, Unknown=0, NotChecked=0, Total=1640 [2019-12-18 23:34:03,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2019-12-18 23:34:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 1716. [2019-12-18 23:34:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2019-12-18 23:34:03,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 3978 transitions. [2019-12-18 23:34:03,210 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 3978 transitions. Word has length 48 [2019-12-18 23:34:03,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:03,210 INFO L462 AbstractCegarLoop]: Abstraction has 1716 states and 3978 transitions. [2019-12-18 23:34:03,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:34:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 3978 transitions. [2019-12-18 23:34:03,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:34:03,212 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:03,212 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:03,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:03,413 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1365423931, now seen corresponding path program 35 times [2019-12-18 23:34:03,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:03,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295458673] [2019-12-18 23:34:03,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:03,587 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 23:34:03,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295458673] [2019-12-18 23:34:03,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639428648] [2019-12-18 23:34:03,588 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 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 23:34:03,670 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 23:34:03,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:03,671 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:34:03,673 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:05,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:05,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:05,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:05,337 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 23:34:05,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:05,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:34:05,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434746704] [2019-12-18 23:34:05,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:34:05,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:05,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:34:05,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:34:05,338 INFO L87 Difference]: Start difference. First operand 1716 states and 3978 transitions. Second operand 20 states. [2019-12-18 23:34:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:08,257 INFO L93 Difference]: Finished difference Result 3494 states and 7688 transitions. [2019-12-18 23:34:08,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-18 23:34:08,257 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:34:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:08,262 INFO L225 Difference]: With dead ends: 3494 [2019-12-18 23:34:08,262 INFO L226 Difference]: Without dead ends: 3329 [2019-12-18 23:34:08,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=420, Invalid=1471, Unknown=1, NotChecked=0, Total=1892 [2019-12-18 23:34:08,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3329 states. [2019-12-18 23:34:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3329 to 1728. [2019-12-18 23:34:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1728 states. [2019-12-18 23:34:08,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 4005 transitions. [2019-12-18 23:34:08,293 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 4005 transitions. Word has length 48 [2019-12-18 23:34:08,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:08,293 INFO L462 AbstractCegarLoop]: Abstraction has 1728 states and 4005 transitions. [2019-12-18 23:34:08,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:34:08,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 4005 transitions. [2019-12-18 23:34:08,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:34:08,295 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:08,295 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:08,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:08,498 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:08,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1958430305, now seen corresponding path program 36 times [2019-12-18 23:34:08,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:08,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284015768] [2019-12-18 23:34:08,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:08,667 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 23:34:08,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284015768] [2019-12-18 23:34:08,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109406533] [2019-12-18 23:34:08,667 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 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 23:34:08,718 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 23:34:08,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:08,719 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:34:08,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:09,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:09,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:09,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:09,902 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 23:34:09,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:09,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:34:09,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497651177] [2019-12-18 23:34:09,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:34:09,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:09,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:34:09,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=300, Unknown=1, NotChecked=0, Total=380 [2019-12-18 23:34:09,904 INFO L87 Difference]: Start difference. First operand 1728 states and 4005 transitions. Second operand 20 states. [2019-12-18 23:34:10,315 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-12-18 23:34:12,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:12,302 INFO L93 Difference]: Finished difference Result 3550 states and 7768 transitions. [2019-12-18 23:34:12,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-18 23:34:12,302 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:34:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:12,305 INFO L225 Difference]: With dead ends: 3550 [2019-12-18 23:34:12,306 INFO L226 Difference]: Without dead ends: 3385 [2019-12-18 23:34:12,306 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=410, Invalid=1481, Unknown=1, NotChecked=0, Total=1892 [2019-12-18 23:34:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2019-12-18 23:34:12,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 1728. [2019-12-18 23:34:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1728 states. [2019-12-18 23:34:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 4005 transitions. [2019-12-18 23:34:12,332 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 4005 transitions. Word has length 48 [2019-12-18 23:34:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:12,332 INFO L462 AbstractCegarLoop]: Abstraction has 1728 states and 4005 transitions. [2019-12-18 23:34:12,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:34:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 4005 transitions. [2019-12-18 23:34:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:34:12,334 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:12,334 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:12,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:12,535 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:12,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:12,535 INFO L82 PathProgramCache]: Analyzing trace with hash -118935109, now seen corresponding path program 37 times [2019-12-18 23:34:12,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:12,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840197927] [2019-12-18 23:34:12,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:12,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840197927] [2019-12-18 23:34:12,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507261896] [2019-12-18 23:34:12,697 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 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 23:34:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:12,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:34:12,775 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:13,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:13,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:13,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:13,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:13,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:34:13,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622921622] [2019-12-18 23:34:13,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:34:13,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:13,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:34:13,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:34:13,048 INFO L87 Difference]: Start difference. First operand 1728 states and 4005 transitions. Second operand 20 states. [2019-12-18 23:34:14,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:14,170 INFO L93 Difference]: Finished difference Result 3163 states and 7076 transitions. [2019-12-18 23:34:14,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-18 23:34:14,170 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:34:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:14,173 INFO L225 Difference]: With dead ends: 3163 [2019-12-18 23:34:14,173 INFO L226 Difference]: Without dead ends: 2833 [2019-12-18 23:34:14,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=389, Invalid=1503, Unknown=0, NotChecked=0, Total=1892 [2019-12-18 23:34:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2019-12-18 23:34:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1790. [2019-12-18 23:34:14,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1790 states. [2019-12-18 23:34:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 4128 transitions. [2019-12-18 23:34:14,193 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 4128 transitions. Word has length 48 [2019-12-18 23:34:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:14,193 INFO L462 AbstractCegarLoop]: Abstraction has 1790 states and 4128 transitions. [2019-12-18 23:34:14,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:34:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 4128 transitions. [2019-12-18 23:34:14,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:34:14,195 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:14,195 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:14,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:14,396 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1833927724, now seen corresponding path program 38 times [2019-12-18 23:34:14,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:14,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801176901] [2019-12-18 23:34:14,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:14,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801176901] [2019-12-18 23:34:14,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452590706] [2019-12-18 23:34:14,589 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 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 23:34:14,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:34:14,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:14,641 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:34:14,642 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:15,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:15,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:15,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:15,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:15,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:34:15,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147046345] [2019-12-18 23:34:15,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:34:15,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:15,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:34:15,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:34:15,742 INFO L87 Difference]: Start difference. First operand 1790 states and 4128 transitions. Second operand 22 states. [2019-12-18 23:34:17,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:17,721 INFO L93 Difference]: Finished difference Result 3496 states and 7638 transitions. [2019-12-18 23:34:17,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-18 23:34:17,722 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:34:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:17,726 INFO L225 Difference]: With dead ends: 3496 [2019-12-18 23:34:17,726 INFO L226 Difference]: Without dead ends: 3331 [2019-12-18 23:34:17,727 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=397, Invalid=1494, Unknown=1, NotChecked=0, Total=1892 [2019-12-18 23:34:17,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2019-12-18 23:34:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 1822. [2019-12-18 23:34:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1822 states. [2019-12-18 23:34:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 4208 transitions. [2019-12-18 23:34:17,748 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 4208 transitions. Word has length 52 [2019-12-18 23:34:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:17,748 INFO L462 AbstractCegarLoop]: Abstraction has 1822 states and 4208 transitions. [2019-12-18 23:34:17,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:34:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 4208 transitions. [2019-12-18 23:34:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:34:17,751 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:17,751 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:17,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:17,952 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:17,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1047655542, now seen corresponding path program 39 times [2019-12-18 23:34:17,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:17,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618385110] [2019-12-18 23:34:17,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:18,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618385110] [2019-12-18 23:34:18,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319408684] [2019-12-18 23:34:18,212 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 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 23:34:18,284 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-18 23:34:18,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:18,285 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-18 23:34:18,287 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:18,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:18,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:18,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:18,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:18,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2019-12-18 23:34:18,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295268528] [2019-12-18 23:34:18,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-18 23:34:18,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:18,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-18 23:34:18,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2019-12-18 23:34:18,623 INFO L87 Difference]: Start difference. First operand 1822 states and 4208 transitions. Second operand 23 states. [2019-12-18 23:34:19,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:19,526 INFO L93 Difference]: Finished difference Result 3614 states and 7928 transitions. [2019-12-18 23:34:19,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-18 23:34:19,526 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2019-12-18 23:34:19,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:19,531 INFO L225 Difference]: With dead ends: 3614 [2019-12-18 23:34:19,531 INFO L226 Difference]: Without dead ends: 3449 [2019-12-18 23:34:19,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2019-12-18 23:34:19,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states. [2019-12-18 23:34:19,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 1870. [2019-12-18 23:34:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1870 states. [2019-12-18 23:34:19,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 4328 transitions. [2019-12-18 23:34:19,553 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 4328 transitions. Word has length 52 [2019-12-18 23:34:19,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:19,554 INFO L462 AbstractCegarLoop]: Abstraction has 1870 states and 4328 transitions. [2019-12-18 23:34:19,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-18 23:34:19,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 4328 transitions. [2019-12-18 23:34:19,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:34:19,555 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:19,555 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:19,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:19,756 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:19,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1231090320, now seen corresponding path program 40 times [2019-12-18 23:34:19,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:19,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938011565] [2019-12-18 23:34:19,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:19,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938011565] [2019-12-18 23:34:19,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397573497] [2019-12-18 23:34:19,938 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 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 23:34:19,988 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:34:19,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:19,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:34:19,991 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:22,057 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 23:34:22,121 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:22,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:22,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:22,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:22,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:34:22,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251341614] [2019-12-18 23:34:22,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:34:22,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:22,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:34:22,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=365, Unknown=1, NotChecked=0, Total=462 [2019-12-18 23:34:22,135 INFO L87 Difference]: Start difference. First operand 1870 states and 4328 transitions. Second operand 22 states. [2019-12-18 23:34:23,299 WARN L192 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2019-12-18 23:34:24,793 WARN L192 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 23:34:26,395 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2019-12-18 23:34:27,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:27,008 INFO L93 Difference]: Finished difference Result 3665 states and 8013 transitions. [2019-12-18 23:34:27,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-18 23:34:27,009 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:34:27,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:27,013 INFO L225 Difference]: With dead ends: 3665 [2019-12-18 23:34:27,014 INFO L226 Difference]: Without dead ends: 3500 [2019-12-18 23:34:27,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=443, Invalid=1624, Unknown=3, NotChecked=0, Total=2070 [2019-12-18 23:34:27,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2019-12-18 23:34:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 1886. [2019-12-18 23:34:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2019-12-18 23:34:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 4368 transitions. [2019-12-18 23:34:27,038 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 4368 transitions. Word has length 52 [2019-12-18 23:34:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:27,038 INFO L462 AbstractCegarLoop]: Abstraction has 1886 states and 4368 transitions. [2019-12-18 23:34:27,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:34:27,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 4368 transitions. [2019-12-18 23:34:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:34:27,041 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:27,041 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:27,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:27,241 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:27,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:27,242 INFO L82 PathProgramCache]: Analyzing trace with hash 210070410, now seen corresponding path program 41 times [2019-12-18 23:34:27,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:27,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953063592] [2019-12-18 23:34:27,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:27,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953063592] [2019-12-18 23:34:27,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528056260] [2019-12-18 23:34:27,445 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 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 23:34:27,492 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 23:34:27,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:27,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:34:27,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:32,733 WARN L192 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-18 23:34:32,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:32,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:32,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:32,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:32,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:34:32,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713951938] [2019-12-18 23:34:32,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:34:32,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:32,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:34:32,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=361, Unknown=1, NotChecked=0, Total=462 [2019-12-18 23:34:32,758 INFO L87 Difference]: Start difference. First operand 1886 states and 4368 transitions. Second operand 22 states. [2019-12-18 23:34:33,288 WARN L192 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2019-12-18 23:34:35,492 WARN L192 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2019-12-18 23:34:36,021 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-12-18 23:34:36,761 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2019-12-18 23:34:43,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:43,081 INFO L93 Difference]: Finished difference Result 3726 states and 8189 transitions. [2019-12-18 23:34:43,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:34:43,081 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:34:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:43,085 INFO L225 Difference]: With dead ends: 3726 [2019-12-18 23:34:43,085 INFO L226 Difference]: Without dead ends: 3561 [2019-12-18 23:34:43,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=396, Invalid=1404, Unknown=6, NotChecked=0, Total=1806 [2019-12-18 23:34:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2019-12-18 23:34:43,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 1886. [2019-12-18 23:34:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2019-12-18 23:34:43,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 4368 transitions. [2019-12-18 23:34:43,108 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 4368 transitions. Word has length 52 [2019-12-18 23:34:43,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:43,109 INFO L462 AbstractCegarLoop]: Abstraction has 1886 states and 4368 transitions. [2019-12-18 23:34:43,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:34:43,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 4368 transitions. [2019-12-18 23:34:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:34:43,111 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:43,111 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:43,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:43,311 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:43,312 INFO L82 PathProgramCache]: Analyzing trace with hash 803076784, now seen corresponding path program 42 times [2019-12-18 23:34:43,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:43,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192613899] [2019-12-18 23:34:43,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:43,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192613899] [2019-12-18 23:34:43,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521182716] [2019-12-18 23:34:43,493 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 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 23:34:43,543 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 23:34:43,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:43,544 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:34:43,545 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:53,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:53,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:53,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:53,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:53,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:34:53,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896423671] [2019-12-18 23:34:53,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:34:53,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:53,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:34:53,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=364, Unknown=3, NotChecked=0, Total=462 [2019-12-18 23:34:53,179 INFO L87 Difference]: Start difference. First operand 1886 states and 4368 transitions. Second operand 22 states. [2019-12-18 23:34:59,546 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2019-12-18 23:35:15,835 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2019-12-18 23:35:20,345 WARN L192 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2019-12-18 23:35:24,794 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 35 DAG size of output: 31 Received shutdown request... [2019-12-18 23:35:44,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-18 23:35:44,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:35:44,554 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 23:35:44,560 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 23:35:44,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:35:44 BasicIcfg [2019-12-18 23:35:44,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 23:35:44,562 INFO L168 Benchmark]: Toolchain (without parser) took 273894.82 ms. Allocated memory was 144.7 MB in the beginning and 327.2 MB in the end (delta: 182.5 MB). Free memory was 100.1 MB in the beginning and 152.4 MB in the end (delta: -52.4 MB). Peak memory consumption was 130.1 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:44,563 INFO L168 Benchmark]: CDTParser took 1.48 ms. Allocated memory is still 144.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-12-18 23:35:44,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 729.49 ms. Allocated memory was 144.7 MB in the beginning and 203.4 MB in the end (delta: 58.7 MB). Free memory was 99.7 MB in the beginning and 163.3 MB in the end (delta: -63.7 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:44,563 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.04 ms. Allocated memory is still 203.4 MB. Free memory was 163.3 MB in the beginning and 161.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:44,564 INFO L168 Benchmark]: Boogie Preprocessor took 24.82 ms. Allocated memory is still 203.4 MB. Free memory was 161.3 MB in the beginning and 159.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:44,564 INFO L168 Benchmark]: RCFGBuilder took 420.43 ms. Allocated memory is still 203.4 MB. Free memory was 159.9 MB in the beginning and 139.8 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:44,564 INFO L168 Benchmark]: TraceAbstraction took 272653.97 ms. Allocated memory was 203.4 MB in the beginning and 327.2 MB in the end (delta: 123.7 MB). Free memory was 139.8 MB in the beginning and 152.4 MB in the end (delta: -12.7 MB). Peak memory consumption was 111.1 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:44,566 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.48 ms. Allocated memory is still 144.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 729.49 ms. Allocated memory was 144.7 MB in the beginning and 203.4 MB in the end (delta: 58.7 MB). Free memory was 99.7 MB in the beginning and 163.3 MB in the end (delta: -63.7 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 61.04 ms. Allocated memory is still 203.4 MB. Free memory was 163.3 MB in the beginning and 161.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.82 ms. Allocated memory is still 203.4 MB. Free memory was 161.3 MB in the beginning and 159.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 420.43 ms. Allocated memory is still 203.4 MB. Free memory was 159.9 MB in the beginning and 139.8 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 272653.97 ms. Allocated memory was 203.4 MB in the beginning and 327.2 MB in the end (delta: 123.7 MB). Free memory was 139.8 MB in the beginning and 152.4 MB in the end (delta: -12.7 MB). Peak memory consumption was 111.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (1886states) and FLOYD_HOARE automaton (currently 36 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (2933 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 272.5s, OverallIterations: 56, TraceHistogramMax: 6, AutomataDifference: 190.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 4586 SDtfs, 47716 SDslu, 48017 SDs, 0 SdLazy, 8614 SolverSat, 3189 SolverUnsat, 59 SolverUnknown, 0 SolverNotchecked, 74.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3733 GetRequests, 1965 SyntacticMatches, 4 SemanticMatches, 1764 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 14353 ImplicationChecksByTransitivity, 174.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1886occurred in iteration=54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 55 MinimizatonAttempts, 52577 StatesRemovedByMinimization, 55 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 65.1s InterpolantComputationTime, 4660 NumberOfCodeBlocks, 4660 NumberOfCodeBlocksAsserted, 193 NumberOfCheckSat, 4553 ConstructedInterpolants, 109 QuantifiedInterpolants, 2353757 SizeOfPredicates, 204 NumberOfNonLiveVariables, 6006 ConjunctsInSsa, 681 ConjunctsInUnsatCore, 107 InterpolantComputations, 5 PerfectInterpolantSequences, 0/1866 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