/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-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 18:41:44,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 18:41:44,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 18:41:44,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 18:41:44,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 18:41:44,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 18:41:44,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 18:41:44,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 18:41:44,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 18:41:44,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 18:41:44,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 18:41:44,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 18:41:44,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 18:41:44,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 18:41:44,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 18:41:44,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 18:41:44,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 18:41:44,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 18:41:44,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 18:41:44,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 18:41:44,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 18:41:44,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 18:41:44,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 18:41:44,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 18:41:44,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 18:41:44,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 18:41:44,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 18:41:44,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 18:41:44,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 18:41:44,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 18:41:44,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 18:41:44,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 18:41:44,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 18:41:44,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 18:41:44,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 18:41:44,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 18:41:44,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 18:41:44,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 18:41:44,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 18:41:44,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 18:41:44,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 18:41:44,378 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-SemanticLbe.epf [2020-04-17 18:41:44,405 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 18:41:44,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 18:41:44,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 18:41:44,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 18:41:44,407 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 18:41:44,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 18:41:44,408 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 18:41:44,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 18:41:44,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 18:41:44,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 18:41:44,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 18:41:44,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 18:41:44,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 18:41:44,409 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 18:41:44,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 18:41:44,410 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 18:41:44,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 18:41:44,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 18:41:44,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 18:41:44,411 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 18:41:44,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 18:41:44,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:41:44,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 18:41:44,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 18:41:44,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 18:41:44,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 18:41:44,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 18:41:44,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 18:41:44,412 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 18:41:44,714 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 18:41:44,725 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 18:41:44,729 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 18:41:44,730 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 18:41:44,730 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 18:41:44,731 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-04-17 18:41:44,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17785c521/a9eed6fb99484703bab7aab90bbc51b8/FLAG9ca04f740 [2020-04-17 18:41:45,408 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 18:41:45,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-04-17 18:41:45,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17785c521/a9eed6fb99484703bab7aab90bbc51b8/FLAG9ca04f740 [2020-04-17 18:41:45,714 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17785c521/a9eed6fb99484703bab7aab90bbc51b8 [2020-04-17 18:41:45,722 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 18:41:45,746 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 18:41:45,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 18:41:45,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 18:41:45,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 18:41:45,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:41:45" (1/1) ... [2020-04-17 18:41:45,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c7eb48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:45, skipping insertion in model container [2020-04-17 18:41:45,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:41:45" (1/1) ... [2020-04-17 18:41:45,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 18:41:45,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 18:41:46,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:41:46,289 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 18:41:46,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:41:46,417 INFO L208 MainTranslator]: Completed translation [2020-04-17 18:41:46,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46 WrapperNode [2020-04-17 18:41:46,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 18:41:46,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 18:41:46,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 18:41:46,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 18:41:46,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 18:41:46,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 18:41:46,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 18:41:46,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 18:41:46,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 18:41:46,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 18:41:46,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 18:41:46,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 18:41:46,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (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 [2020-04-17 18:41:46,548 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 18:41:46,548 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 18:41:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 18:41:46,549 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 18:41:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 18:41:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 18:41:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 18:41:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 18:41:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 18:41:46,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 18:41:46,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 18:41:46,551 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 18:41:46,883 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 18:41:46,884 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 18:41:46,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:41:46 BoogieIcfgContainer [2020-04-17 18:41:46,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 18:41:46,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 18:41:46,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 18:41:46,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 18:41:46,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 06:41:45" (1/3) ... [2020-04-17 18:41:46,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54693b31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:41:46, skipping insertion in model container [2020-04-17 18:41:46,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (2/3) ... [2020-04-17 18:41:46,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54693b31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:41:46, skipping insertion in model container [2020-04-17 18:41:46,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:41:46" (3/3) ... [2020-04-17 18:41:46,896 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-04-17 18:41:46,908 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 18:41:46,908 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 18:41:46,914 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 18:41:46,915 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 18:41:46,947 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,948 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,953 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,954 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,954 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,954 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,955 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,955 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,955 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,956 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,956 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,956 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,957 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,957 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,957 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,958 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,958 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,958 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,958 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,959 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,959 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,960 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,961 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,961 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,961 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,962 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,962 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,962 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,963 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,963 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,968 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,968 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,968 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,969 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,969 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,969 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,974 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,975 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,975 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,975 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,975 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,976 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,989 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 18:41:47,006 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:41:47,007 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:41:47,007 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:41:47,007 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:41:47,007 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:41:47,007 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:41:47,007 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:41:47,008 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:41:47,021 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-17 18:41:47,023 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 18:41:47,062 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 18:41:47,063 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:41:47,069 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 18:41:47,072 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 18:41:47,101 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 18:41:47,102 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:41:47,103 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 18:41:47,108 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-17 18:41:47,109 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:41:48,373 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-17 18:41:48,520 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-04-17 18:41:48,521 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-04-17 18:41:48,525 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-17 18:41:48,536 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 18:41:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 18:41:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 18:41:48,546 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:48,547 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 18:41:48,547 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:48,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:48,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-04-17 18:41:48,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:48,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388602665] [2020-04-17 18:41:48,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:48,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388602665] [2020-04-17 18:41:48,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:48,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:41:48,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608630937] [2020-04-17 18:41:48,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:41:48,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:48,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:41:48,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:41:48,943 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 18:41:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,031 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-17 18:41:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:41:49,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 18:41:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,053 INFO L225 Difference]: With dead ends: 83 [2020-04-17 18:41:49,053 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 18:41:49,055 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 18:41:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-17 18:41:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:41:49,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-17 18:41:49,112 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-17 18:41:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,112 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-17 18:41:49,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:41:49,113 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-17 18:41:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:41:49,119 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,119 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,119 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,126 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-04-17 18:41:49,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597457394] [2020-04-17 18:41:49,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597457394] [2020-04-17 18:41:49,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:49,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:41:49,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686115479] [2020-04-17 18:41:49,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:41:49,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:41:49,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,227 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-04-17 18:41:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,315 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-17 18:41:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:49,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:41:49,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,320 INFO L225 Difference]: With dead ends: 80 [2020-04-17 18:41:49,320 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 18:41:49,322 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:41:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 18:41:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-17 18:41:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 18:41:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-17 18:41:49,332 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-17 18:41:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,334 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-17 18:41:49,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:41:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-17 18:41:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:41:49,335 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,335 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,335 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,336 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-04-17 18:41:49,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813061716] [2020-04-17 18:41:49,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813061716] [2020-04-17 18:41:49,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:49,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:41:49,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837251230] [2020-04-17 18:41:49,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:41:49,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:41:49,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,430 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-04-17 18:41:49,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,470 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-04-17 18:41:49,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:41:49,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:41:49,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,473 INFO L225 Difference]: With dead ends: 73 [2020-04-17 18:41:49,474 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 18:41:49,474 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 18:41:49,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-04-17 18:41:49,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 18:41:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-04-17 18:41:49,483 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-04-17 18:41:49,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,484 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-04-17 18:41:49,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:41:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-04-17 18:41:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:41:49,485 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,485 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,485 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,486 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-04-17 18:41:49,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811891375] [2020-04-17 18:41:49,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811891375] [2020-04-17 18:41:49,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:49,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:41:49,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687135712] [2020-04-17 18:41:49,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:41:49,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:41:49,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,555 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-04-17 18:41:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,639 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-04-17 18:41:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:49,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:41:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,641 INFO L225 Difference]: With dead ends: 86 [2020-04-17 18:41:49,641 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 18:41:49,641 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:41:49,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 18:41:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-04-17 18:41:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 18:41:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-17 18:41:49,650 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-17 18:41:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,651 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-17 18:41:49,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:41:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-17 18:41:49,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:49,652 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,652 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,653 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-04-17 18:41:49,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707942843] [2020-04-17 18:41:49,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707942843] [2020-04-17 18:41:49,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963188705] [2020-04-17 18:41:49,769 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:49,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:49,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:49,838 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:49,842 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:49,906 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:49,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-17 18:41:49,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295505010] [2020-04-17 18:41:49,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:41:49,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:41:49,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:41:49,929 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-04-17 18:41:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:50,016 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-17 18:41:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:50,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-04-17 18:41:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:50,018 INFO L225 Difference]: With dead ends: 101 [2020-04-17 18:41:50,018 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 18:41:50,018 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 18:41:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-17 18:41:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 18:41:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-17 18:41:50,027 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-17 18:41:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:50,028 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-17 18:41:50,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:41:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-17 18:41:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:50,029 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:50,029 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:50,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,240 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:50,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-04-17 18:41:50,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:50,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292766601] [2020-04-17 18:41:50,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292766601] [2020-04-17 18:41:50,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663746433] [2020-04-17 18:41:50,365 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:50,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:50,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:50,421 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:50,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 18:41:50,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569488111] [2020-04-17 18:41:50,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:41:50,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:50,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:41:50,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:50,508 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-04-17 18:41:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:50,551 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 18:41:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 18:41:50,551 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 18:41:50,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:50,552 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:41:50,552 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 18:41:50,553 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 18:41:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-04-17 18:41:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:41:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-04-17 18:41:50,569 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-04-17 18:41:50,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:50,570 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-04-17 18:41:50,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:41:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-04-17 18:41:50,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:50,571 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:50,574 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:50,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,779 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:50,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:50,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-04-17 18:41:50,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:50,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565221229] [2020-04-17 18:41:50,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565221229] [2020-04-17 18:41:50,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399422418] [2020-04-17 18:41:50,879 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,926 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:41:50,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:50,927 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:50,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:50,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 18:41:50,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535611129] [2020-04-17 18:41:50,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:41:50,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:50,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:41:50,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:50,999 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-04-17 18:41:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:51,060 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-04-17 18:41:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:51,060 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 18:41:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:51,061 INFO L225 Difference]: With dead ends: 90 [2020-04-17 18:41:51,061 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 18:41:51,062 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:41:51,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 18:41:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-04-17 18:41:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 18:41:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-04-17 18:41:51,069 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-04-17 18:41:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:51,069 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-04-17 18:41:51,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:41:51,070 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-04-17 18:41:51,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:51,071 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:51,071 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:51,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:51,274 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:51,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-04-17 18:41:51,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:51,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714786133] [2020-04-17 18:41:51,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714786133] [2020-04-17 18:41:51,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399108263] [2020-04-17 18:41:51,369 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:51,413 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:51,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:51,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:51,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:51,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:51,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 18:41:51,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714915627] [2020-04-17 18:41:51,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:41:51,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:51,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:41:51,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:51,470 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-04-17 18:41:51,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:51,563 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 18:41:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:51,564 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 18:41:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:51,564 INFO L225 Difference]: With dead ends: 99 [2020-04-17 18:41:51,565 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 18:41:51,565 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:51,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 18:41:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-04-17 18:41:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 18:41:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-04-17 18:41:51,572 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-04-17 18:41:51,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:51,572 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-04-17 18:41:51,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:41:51,572 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-04-17 18:41:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:51,573 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:51,573 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:51,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:51,783 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:51,784 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-04-17 18:41:51,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:51,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711762303] [2020-04-17 18:41:51,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711762303] [2020-04-17 18:41:51,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:51,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:51,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202763700] [2020-04-17 18:41:51,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:51,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:51,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:51,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:51,891 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-04-17 18:41:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:51,924 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-04-17 18:41:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 18:41:51,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:51,926 INFO L225 Difference]: With dead ends: 92 [2020-04-17 18:41:51,926 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 18:41:51,927 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 18:41:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-04-17 18:41:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 18:41:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-04-17 18:41:51,943 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-04-17 18:41:51,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:51,944 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-04-17 18:41:51,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-04-17 18:41:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:51,945 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:51,946 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:51,946 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:51,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:51,948 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-04-17 18:41:51,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:51,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180260151] [2020-04-17 18:41:51,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180260151] [2020-04-17 18:41:52,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:52,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:52,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285033202] [2020-04-17 18:41:52,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:52,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:52,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,048 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-04-17 18:41:52,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,097 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-04-17 18:41:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:52,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,099 INFO L225 Difference]: With dead ends: 100 [2020-04-17 18:41:52,099 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 18:41:52,100 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:41:52,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 18:41:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-04-17 18:41:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 18:41:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-04-17 18:41:52,107 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-04-17 18:41:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,107 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-04-17 18:41:52,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-04-17 18:41:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,108 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,108 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,108 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,109 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-04-17 18:41:52,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111274403] [2020-04-17 18:41:52,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111274403] [2020-04-17 18:41:52,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:52,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:52,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176944467] [2020-04-17 18:41:52,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:52,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:52,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,208 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-04-17 18:41:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,297 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 18:41:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:52,298 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,299 INFO L225 Difference]: With dead ends: 105 [2020-04-17 18:41:52,299 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 18:41:52,299 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 18:41:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 18:41:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 18:41:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-04-17 18:41:52,309 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-04-17 18:41:52,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,309 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-04-17 18:41:52,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-04-17 18:41:52,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,310 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,310 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,311 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,311 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-04-17 18:41:52,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337779051] [2020-04-17 18:41:52,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337779051] [2020-04-17 18:41:52,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:52,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:52,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530186664] [2020-04-17 18:41:52,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:52,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:52,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,384 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-04-17 18:41:52,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,478 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 18:41:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:52,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:52,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,480 INFO L225 Difference]: With dead ends: 105 [2020-04-17 18:41:52,480 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 18:41:52,480 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:52,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 18:41:52,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 18:41:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 18:41:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-04-17 18:41:52,488 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-04-17 18:41:52,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,488 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-04-17 18:41:52,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-04-17 18:41:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,489 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,489 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,490 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,490 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-04-17 18:41:52,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673453983] [2020-04-17 18:41:52,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673453983] [2020-04-17 18:41:52,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361617856] [2020-04-17 18:41:52,608 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:52,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:52,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:52,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:52,662 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:52,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:52,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 18:41:52,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635984070] [2020-04-17 18:41:52,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:41:52,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:41:52,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:52,773 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-04-17 18:41:52,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,899 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-04-17 18:41:52,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:41:52,900 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-04-17 18:41:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,901 INFO L225 Difference]: With dead ends: 122 [2020-04-17 18:41:52,901 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 18:41:52,902 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:41:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 18:41:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-04-17 18:41:52,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 18:41:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-04-17 18:41:52,906 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-04-17 18:41:52,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,907 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-04-17 18:41:52,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:41:52,907 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-04-17 18:41:52,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,908 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,908 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:53,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:53,118 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:53,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:53,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-04-17 18:41:53,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:53,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419946252] [2020-04-17 18:41:53,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419946252] [2020-04-17 18:41:53,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087207895] [2020-04-17 18:41:53,222 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:53,269 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:41:53,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:53,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:53,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:53,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:53,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059231025] [2020-04-17 18:41:53,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:53,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:53,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:53,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:53,360 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-04-17 18:41:53,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:53,400 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 18:41:53,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:53,401 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:53,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:53,402 INFO L225 Difference]: With dead ends: 108 [2020-04-17 18:41:53,402 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 18:41:53,403 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 18:41:53,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-04-17 18:41:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 18:41:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-04-17 18:41:53,408 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-04-17 18:41:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:53,409 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-04-17 18:41:53,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-04-17 18:41:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:53,410 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:53,410 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:53,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:53,611 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:53,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-04-17 18:41:53,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:53,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038507213] [2020-04-17 18:41:53,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038507213] [2020-04-17 18:41:53,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17047320] [2020-04-17 18:41:53,686 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:53,731 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:53,732 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:53,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:53,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550380782] [2020-04-17 18:41:53,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:53,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:53,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:53,803 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-04-17 18:41:53,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:53,869 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-04-17 18:41:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:53,869 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:53,871 INFO L225 Difference]: With dead ends: 116 [2020-04-17 18:41:53,871 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 18:41:53,871 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 18:41:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-04-17 18:41:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 18:41:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-04-17 18:41:53,877 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-04-17 18:41:53,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:53,877 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-04-17 18:41:53,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-04-17 18:41:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:53,878 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:53,879 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:54,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:54,082 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-04-17 18:41:54,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:54,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052099967] [2020-04-17 18:41:54,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052099967] [2020-04-17 18:41:54,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990089323] [2020-04-17 18:41:54,172 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 [2020-04-17 18:41:54,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:54,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:54,222 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:54,223 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:54,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:54,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143634588] [2020-04-17 18:41:54,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:54,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:54,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:54,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:54,291 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-04-17 18:41:54,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:54,381 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-04-17 18:41:54,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:54,381 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:54,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:54,382 INFO L225 Difference]: With dead ends: 115 [2020-04-17 18:41:54,382 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 18:41:54,382 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:54,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 18:41:54,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-04-17 18:41:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 18:41:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-04-17 18:41:54,386 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-04-17 18:41:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:54,386 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-04-17 18:41:54,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-04-17 18:41:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:54,387 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:54,387 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:54,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:54,592 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-04-17 18:41:54,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:54,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835605463] [2020-04-17 18:41:54,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835605463] [2020-04-17 18:41:54,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727791632] [2020-04-17 18:41:54,659 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 [2020-04-17 18:41:54,704 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:54,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:54,705 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:54,706 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:54,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:54,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:54,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51660222] [2020-04-17 18:41:54,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:54,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:54,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:54,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:54,776 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-04-17 18:41:54,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:54,879 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-04-17 18:41:54,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:41:54,880 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:54,881 INFO L225 Difference]: With dead ends: 124 [2020-04-17 18:41:54,881 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 18:41:54,881 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:41:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 18:41:54,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-04-17 18:41:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 18:41:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-04-17 18:41:54,886 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-04-17 18:41:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:54,887 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-04-17 18:41:54,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-04-17 18:41:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:54,887 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:54,888 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:55,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:55,096 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:55,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-04-17 18:41:55,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:55,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332053817] [2020-04-17 18:41:55,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332053817] [2020-04-17 18:41:55,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102377374] [2020-04-17 18:41:55,169 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:55,206 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:55,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:55,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:55,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:55,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:55,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308746424] [2020-04-17 18:41:55,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:55,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:55,291 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-04-17 18:41:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:55,333 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-04-17 18:41:55,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:55,334 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:55,335 INFO L225 Difference]: With dead ends: 113 [2020-04-17 18:41:55,335 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 18:41:55,335 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 18:41:55,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-04-17 18:41:55,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-17 18:41:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-04-17 18:41:55,339 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-04-17 18:41:55,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:55,340 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-04-17 18:41:55,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:55,340 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-04-17 18:41:55,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:55,340 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:55,340 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:55,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:55,542 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:55,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:55,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-04-17 18:41:55,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:55,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880077876] [2020-04-17 18:41:55,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880077876] [2020-04-17 18:41:55,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839123238] [2020-04-17 18:41:55,615 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:55,663 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:41:55,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:55,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:55,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:55,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:55,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626255385] [2020-04-17 18:41:55,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:55,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:55,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:55,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:55,741 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-04-17 18:41:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:55,812 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-04-17 18:41:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:55,812 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:55,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:55,813 INFO L225 Difference]: With dead ends: 118 [2020-04-17 18:41:55,813 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 18:41:55,814 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:55,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 18:41:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-04-17 18:41:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-04-17 18:41:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-04-17 18:41:55,818 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-04-17 18:41:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:55,818 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-04-17 18:41:55,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-04-17 18:41:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:55,819 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:55,819 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:56,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:56,019 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:56,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-04-17 18:41:56,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:56,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585701329] [2020-04-17 18:41:56,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585701329] [2020-04-17 18:41:56,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919462006] [2020-04-17 18:41:56,120 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:56,163 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:56,165 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:56,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:56,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156908783] [2020-04-17 18:41:56,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:56,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:56,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:56,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:56,242 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-04-17 18:41:56,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:56,315 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-04-17 18:41:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:56,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:56,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:56,317 INFO L225 Difference]: With dead ends: 119 [2020-04-17 18:41:56,317 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 18:41:56,317 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 18:41:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-04-17 18:41:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 18:41:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-04-17 18:41:56,322 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-04-17 18:41:56,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:56,322 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-04-17 18:41:56,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-04-17 18:41:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:56,323 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:56,323 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:56,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:56,526 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:56,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:56,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-04-17 18:41:56,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:56,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31298229] [2020-04-17 18:41:56,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31298229] [2020-04-17 18:41:56,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585992876] [2020-04-17 18:41:56,604 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:56,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:56,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:56,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:56,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:56,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:56,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090594179] [2020-04-17 18:41:56,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:56,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:56,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:56,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:56,741 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-04-17 18:41:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:56,808 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-04-17 18:41:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:56,808 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:56,809 INFO L225 Difference]: With dead ends: 122 [2020-04-17 18:41:56,809 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 18:41:56,810 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:56,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 18:41:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-04-17 18:41:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-04-17 18:41:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-04-17 18:41:56,815 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-04-17 18:41:56,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:56,816 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-04-17 18:41:56,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-04-17 18:41:56,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:56,816 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:56,817 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:57,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,017 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:57,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:57,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-04-17 18:41:57,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:57,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798372026] [2020-04-17 18:41:57,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798372026] [2020-04-17 18:41:57,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659582595] [2020-04-17 18:41:57,075 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:57,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:57,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:57,122 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:57,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:57,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24484149] [2020-04-17 18:41:57,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:57,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:57,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:57,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:57,192 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-04-17 18:41:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:57,291 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-04-17 18:41:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:41:57,292 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:57,293 INFO L225 Difference]: With dead ends: 123 [2020-04-17 18:41:57,293 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 18:41:57,293 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:41:57,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 18:41:57,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-04-17 18:41:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 18:41:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-04-17 18:41:57,297 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-04-17 18:41:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:57,297 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-04-17 18:41:57,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-04-17 18:41:57,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:57,298 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:57,298 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:57,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,499 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:57,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:57,500 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-04-17 18:41:57,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:57,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153824297] [2020-04-17 18:41:57,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153824297] [2020-04-17 18:41:57,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949588167] [2020-04-17 18:41:57,569 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,620 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:41:57,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:57,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:57,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:57,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:57,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007847647] [2020-04-17 18:41:57,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:57,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:57,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:57,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:57,705 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-04-17 18:41:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:57,784 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 18:41:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:57,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:57,786 INFO L225 Difference]: With dead ends: 123 [2020-04-17 18:41:57,787 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 18:41:57,787 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 18:41:57,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-04-17 18:41:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-04-17 18:41:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-04-17 18:41:57,793 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-04-17 18:41:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:57,793 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-04-17 18:41:57,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-04-17 18:41:57,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:57,797 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:57,797 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:58,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:58,002 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:58,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-04-17 18:41:58,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:58,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600793445] [2020-04-17 18:41:58,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:58,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600793445] [2020-04-17 18:41:58,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756272094] [2020-04-17 18:41:58,098 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:58,169 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:58,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:58,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:58,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:58,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:58,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:58,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:58,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627547064] [2020-04-17 18:41:58,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:58,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:58,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:58,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:58,248 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-04-17 18:41:58,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:58,418 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-04-17 18:41:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:41:58,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:58,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:58,420 INFO L225 Difference]: With dead ends: 133 [2020-04-17 18:41:58,420 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 18:41:58,421 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:41:58,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 18:41:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-04-17 18:41:58,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-04-17 18:41:58,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-04-17 18:41:58,425 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-04-17 18:41:58,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:58,425 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-04-17 18:41:58,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:58,426 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-04-17 18:41:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:58,426 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:58,429 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:58,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:58,632 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:58,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-04-17 18:41:58,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:58,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812660562] [2020-04-17 18:41:58,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:58,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812660562] [2020-04-17 18:41:58,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502767507] [2020-04-17 18:41:58,704 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:58,749 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:41:58,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:58,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:58,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:58,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:58,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:58,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508696263] [2020-04-17 18:41:58,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:58,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:58,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:58,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:58,825 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-04-17 18:41:58,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:58,936 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-04-17 18:41:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:41:58,936 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:58,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:58,937 INFO L225 Difference]: With dead ends: 127 [2020-04-17 18:41:58,937 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 18:41:58,938 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:41:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 18:41:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-04-17 18:41:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 18:41:58,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 18:41:58,942 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 18:41:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:58,942 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 18:41:58,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 18:41:58,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:58,943 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:58,943 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:59,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:59,151 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:59,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:59,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-04-17 18:41:59,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:59,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208528968] [2020-04-17 18:41:59,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208528968] [2020-04-17 18:41:59,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281142286] [2020-04-17 18:41:59,215 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:59,265 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:59,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:59,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:59,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:59,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643466458] [2020-04-17 18:41:59,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:59,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:59,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:59,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:59,323 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 18:41:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:59,537 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-04-17 18:41:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:41:59,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:59,539 INFO L225 Difference]: With dead ends: 141 [2020-04-17 18:41:59,539 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 18:41:59,540 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:41:59,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 18:41:59,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-04-17 18:41:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 18:41:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 18:41:59,545 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 18:41:59,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:59,545 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 18:41:59,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:59,545 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 18:41:59,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:59,546 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:59,546 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:59,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:59,749 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-04-17 18:41:59,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:59,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981110978] [2020-04-17 18:41:59,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981110978] [2020-04-17 18:41:59,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802170515] [2020-04-17 18:41:59,821 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:59,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:59,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:59,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:59,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:59,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:59,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:59,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131269352] [2020-04-17 18:41:59,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:59,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:59,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:59,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:59,921 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 18:42:00,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:00,096 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-04-17 18:42:00,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:00,097 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:00,098 INFO L225 Difference]: With dead ends: 136 [2020-04-17 18:42:00,099 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 18:42:00,099 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:00,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 18:42:00,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-04-17 18:42:00,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 18:42:00,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-04-17 18:42:00,104 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-04-17 18:42:00,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:00,105 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-04-17 18:42:00,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:00,105 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-04-17 18:42:00,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:00,106 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:00,106 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:00,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,314 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:00,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:00,315 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-04-17 18:42:00,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:00,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480841146] [2020-04-17 18:42:00,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480841146] [2020-04-17 18:42:00,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341526083] [2020-04-17 18:42:00,381 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,424 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:00,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:00,425 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:00,426 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:00,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:00,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826799112] [2020-04-17 18:42:00,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:00,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:00,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:00,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:00,487 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-04-17 18:42:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:00,575 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-04-17 18:42:00,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:00,575 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:00,576 INFO L225 Difference]: With dead ends: 130 [2020-04-17 18:42:00,576 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 18:42:00,577 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 18:42:00,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-04-17 18:42:00,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 18:42:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 18:42:00,581 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 18:42:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:00,581 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 18:42:00,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 18:42:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:00,582 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:00,582 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:00,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,786 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:00,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-04-17 18:42:00,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:00,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172500927] [2020-04-17 18:42:00,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172500927] [2020-04-17 18:42:00,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217308978] [2020-04-17 18:42:00,838 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,878 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:00,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:00,879 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:00,880 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:00,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:00,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366924991] [2020-04-17 18:42:00,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:00,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:00,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:00,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:00,956 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 18:42:01,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:01,117 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-04-17 18:42:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:01,118 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:01,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:01,119 INFO L225 Difference]: With dead ends: 131 [2020-04-17 18:42:01,119 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 18:42:01,120 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 18:42:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-04-17 18:42:01,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 18:42:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 18:42:01,123 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 18:42:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:01,124 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 18:42:01,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:01,124 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 18:42:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:01,124 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:01,125 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:01,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,328 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-04-17 18:42:01,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:01,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620975883] [2020-04-17 18:42:01,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620975883] [2020-04-17 18:42:01,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891581779] [2020-04-17 18:42:01,376 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,416 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:01,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:01,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:01,418 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:01,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:01,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:01,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563209160] [2020-04-17 18:42:01,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:01,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:01,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:01,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:01,489 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 18:42:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:01,629 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-04-17 18:42:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:01,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:01,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:01,630 INFO L225 Difference]: With dead ends: 131 [2020-04-17 18:42:01,631 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 18:42:01,632 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 18:42:01,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-04-17 18:42:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 18:42:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 18:42:01,636 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 18:42:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:01,636 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 18:42:01,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 18:42:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:01,637 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:01,637 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:01,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,840 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:01,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-04-17 18:42:01,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:01,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598478395] [2020-04-17 18:42:01,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598478395] [2020-04-17 18:42:01,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112226524] [2020-04-17 18:42:01,890 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,930 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:01,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:01,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:01,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:01,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:01,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:01,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831301790] [2020-04-17 18:42:01,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:01,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:01,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:01,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:01,994 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 18:42:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:02,230 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-04-17 18:42:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:02,230 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:02,232 INFO L225 Difference]: With dead ends: 145 [2020-04-17 18:42:02,232 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 18:42:02,233 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 18:42:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-04-17 18:42:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 18:42:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 18:42:02,237 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 18:42:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:02,237 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 18:42:02,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 18:42:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:02,238 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:02,238 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:02,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:02,442 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:02,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:02,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-04-17 18:42:02,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:02,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312292242] [2020-04-17 18:42:02,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:02,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312292242] [2020-04-17 18:42:02,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315135882] [2020-04-17 18:42:02,488 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:02,534 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:02,535 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:02,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:02,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:02,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:02,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532727233] [2020-04-17 18:42:02,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:02,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:02,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:02,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:02,602 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 18:42:02,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:02,759 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-04-17 18:42:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:02,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:02,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:02,761 INFO L225 Difference]: With dead ends: 135 [2020-04-17 18:42:02,761 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 18:42:02,761 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 18:42:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-04-17 18:42:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 18:42:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-04-17 18:42:02,766 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-04-17 18:42:02,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:02,766 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-04-17 18:42:02,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-04-17 18:42:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:02,767 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:02,767 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:02,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:02,970 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:02,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:02,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-04-17 18:42:02,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:02,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041760846] [2020-04-17 18:42:02,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:03,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041760846] [2020-04-17 18:42:03,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935653714] [2020-04-17 18:42:03,048 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:03,091 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:03,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:03,092 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:03,093 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:03,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:03,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:03,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-04-17 18:42:03,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190162794] [2020-04-17 18:42:03,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:42:03,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:03,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:42:03,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:03,184 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-04-17 18:42:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:03,328 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-04-17 18:42:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:03,329 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-04-17 18:42:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:03,330 INFO L225 Difference]: With dead ends: 143 [2020-04-17 18:42:03,330 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 18:42:03,331 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 18:42:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-04-17 18:42:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-04-17 18:42:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-04-17 18:42:03,335 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-04-17 18:42:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:03,335 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-04-17 18:42:03,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:42:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-04-17 18:42:03,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:03,336 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:03,336 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:03,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:03,539 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:03,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:03,539 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-04-17 18:42:03,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:03,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893384141] [2020-04-17 18:42:03,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:03,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893384141] [2020-04-17 18:42:03,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214951637] [2020-04-17 18:42:03,642 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:03,682 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:03,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:03,682 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:03,683 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:03,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:03,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:03,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74117155] [2020-04-17 18:42:03,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:03,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:03,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:03,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:03,780 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-04-17 18:42:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:03,819 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-04-17 18:42:03,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:42:03,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:03,820 INFO L225 Difference]: With dead ends: 132 [2020-04-17 18:42:03,821 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 18:42:03,821 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 18:42:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-04-17 18:42:03,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 18:42:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 18:42:03,826 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 18:42:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:03,826 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 18:42:03,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:03,826 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 18:42:03,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:03,827 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:03,827 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:04,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:04,030 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:04,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:04,031 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-04-17 18:42:04,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:04,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062449494] [2020-04-17 18:42:04,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062449494] [2020-04-17 18:42:04,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428878187] [2020-04-17 18:42:04,119 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:04,171 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:04,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:04,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:04,173 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:04,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:04,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190962065] [2020-04-17 18:42:04,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:04,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:04,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:04,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:04,288 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 18:42:04,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:04,401 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-04-17 18:42:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:04,402 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:04,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:04,404 INFO L225 Difference]: With dead ends: 143 [2020-04-17 18:42:04,404 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 18:42:04,404 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 18:42:04,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-04-17 18:42:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 18:42:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 18:42:04,410 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 18:42:04,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:04,410 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 18:42:04,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:04,411 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 18:42:04,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:04,411 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:04,412 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:04,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:04,612 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:04,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:04,613 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-04-17 18:42:04,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:04,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114477447] [2020-04-17 18:42:04,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114477447] [2020-04-17 18:42:04,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164863343] [2020-04-17 18:42:04,723 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:04,788 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:42:04,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:04,790 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:04,790 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:04,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:04,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414821545] [2020-04-17 18:42:04,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:04,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:04,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:04,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:04,923 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 18:42:05,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:05,033 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-04-17 18:42:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:05,034 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:05,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:05,035 INFO L225 Difference]: With dead ends: 142 [2020-04-17 18:42:05,035 INFO L226 Difference]: Without dead ends: 139 [2020-04-17 18:42:05,036 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-04-17 18:42:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-04-17 18:42:05,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-04-17 18:42:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-04-17 18:42:05,042 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-04-17 18:42:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:05,043 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-04-17 18:42:05,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-04-17 18:42:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:05,044 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:05,044 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:05,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:05,245 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:05,246 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-04-17 18:42:05,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:05,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200431896] [2020-04-17 18:42:05,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200431896] [2020-04-17 18:42:05,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865073480] [2020-04-17 18:42:05,325 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:05,368 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:05,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:05,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:05,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215639372] [2020-04-17 18:42:05,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:05,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:05,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:05,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:05,474 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-04-17 18:42:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:05,569 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-04-17 18:42:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:05,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:05,570 INFO L225 Difference]: With dead ends: 141 [2020-04-17 18:42:05,570 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 18:42:05,571 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 18:42:05,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-04-17 18:42:05,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 18:42:05,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-04-17 18:42:05,574 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-04-17 18:42:05,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:05,575 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-04-17 18:42:05,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:05,575 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-04-17 18:42:05,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:05,576 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:05,576 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:05,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:05,780 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:05,780 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-04-17 18:42:05,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:05,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504872910] [2020-04-17 18:42:05,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504872910] [2020-04-17 18:42:05,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023617316] [2020-04-17 18:42:05,840 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:05,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:05,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:05,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:05,882 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:05,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:05,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:05,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4218288] [2020-04-17 18:42:05,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:05,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:05,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:05,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:05,955 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-04-17 18:42:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:06,097 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 18:42:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:06,098 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:06,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:06,100 INFO L225 Difference]: With dead ends: 150 [2020-04-17 18:42:06,100 INFO L226 Difference]: Without dead ends: 144 [2020-04-17 18:42:06,100 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:06,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-04-17 18:42:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-04-17 18:42:06,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-04-17 18:42:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-04-17 18:42:06,105 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-04-17 18:42:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:06,105 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-04-17 18:42:06,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-04-17 18:42:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:06,106 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:06,106 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:06,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:06,309 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:06,310 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-04-17 18:42:06,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:06,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142373262] [2020-04-17 18:42:06,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:06,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142373262] [2020-04-17 18:42:06,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069318365] [2020-04-17 18:42:06,382 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:06,427 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:06,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:06,428 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:06,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:06,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:06,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:06,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372270862] [2020-04-17 18:42:06,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:06,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:06,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:06,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:06,518 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-04-17 18:42:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:06,572 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-04-17 18:42:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:42:06,572 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:06,573 INFO L225 Difference]: With dead ends: 138 [2020-04-17 18:42:06,574 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 18:42:06,574 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:06,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 18:42:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-04-17 18:42:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-04-17 18:42:06,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-04-17 18:42:06,579 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-04-17 18:42:06,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:06,579 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-04-17 18:42:06,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-04-17 18:42:06,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:06,580 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:06,580 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:06,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:06,783 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:06,784 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-04-17 18:42:06,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:06,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950402052] [2020-04-17 18:42:06,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:06,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950402052] [2020-04-17 18:42:06,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574825317] [2020-04-17 18:42:06,869 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:06,928 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:06,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:06,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:06,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:07,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:07,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107574709] [2020-04-17 18:42:07,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:07,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:07,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:07,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:07,030 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-04-17 18:42:07,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:07,136 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-04-17 18:42:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:07,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:07,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:07,137 INFO L225 Difference]: With dead ends: 145 [2020-04-17 18:42:07,138 INFO L226 Difference]: Without dead ends: 143 [2020-04-17 18:42:07,138 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:07,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-04-17 18:42:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-04-17 18:42:07,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-04-17 18:42:07,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-04-17 18:42:07,142 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-04-17 18:42:07,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:07,143 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-04-17 18:42:07,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:07,143 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-04-17 18:42:07,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:07,144 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:07,144 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:07,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:07,347 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:07,348 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-04-17 18:42:07,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:07,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021557919] [2020-04-17 18:42:07,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021557919] [2020-04-17 18:42:07,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372018631] [2020-04-17 18:42:07,424 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:07,465 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:07,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:07,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:07,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:07,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:07,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852756018] [2020-04-17 18:42:07,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:07,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:07,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:07,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:07,555 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-04-17 18:42:07,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:07,677 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 18:42:07,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:07,677 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:07,678 INFO L225 Difference]: With dead ends: 150 [2020-04-17 18:42:07,678 INFO L226 Difference]: Without dead ends: 148 [2020-04-17 18:42:07,678 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:07,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-17 18:42:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-04-17 18:42:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-04-17 18:42:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-04-17 18:42:07,682 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-04-17 18:42:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:07,682 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-04-17 18:42:07,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-04-17 18:42:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:07,683 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:07,683 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:07,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:07,886 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-04-17 18:42:07,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:07,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123416467] [2020-04-17 18:42:07,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123416467] [2020-04-17 18:42:07,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683728453] [2020-04-17 18:42:07,966 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:08,012 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:08,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:08,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:08,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:08,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:08,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044189995] [2020-04-17 18:42:08,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:08,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:08,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:08,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:08,109 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-04-17 18:42:08,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:08,248 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-04-17 18:42:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:08,248 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:08,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:08,249 INFO L225 Difference]: With dead ends: 148 [2020-04-17 18:42:08,250 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 18:42:08,250 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 18:42:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-04-17 18:42:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 18:42:08,254 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 18:42:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:08,254 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 18:42:08,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 18:42:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:08,255 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:08,255 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:08,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:08,458 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:08,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:08,458 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-04-17 18:42:08,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:08,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940655215] [2020-04-17 18:42:08,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940655215] [2020-04-17 18:42:08,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528808733] [2020-04-17 18:42:08,537 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:08,582 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:08,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:08,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:08,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:08,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:08,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177609163] [2020-04-17 18:42:08,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:08,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:08,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:08,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:08,655 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 18:42:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:08,786 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-04-17 18:42:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:08,787 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:08,788 INFO L225 Difference]: With dead ends: 149 [2020-04-17 18:42:08,788 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 18:42:08,788 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 18:42:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-04-17 18:42:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-04-17 18:42:08,792 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-04-17 18:42:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:08,792 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-04-17 18:42:08,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-04-17 18:42:08,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:08,793 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:08,793 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:08,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:08,996 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:08,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-04-17 18:42:08,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:08,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616253138] [2020-04-17 18:42:08,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616253138] [2020-04-17 18:42:09,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497293] [2020-04-17 18:42:09,086 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:09,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:09,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:09,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:09,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503751512] [2020-04-17 18:42:09,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:09,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:09,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:09,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:09,242 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-04-17 18:42:09,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:09,316 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-04-17 18:42:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:09,316 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:09,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:09,317 INFO L225 Difference]: With dead ends: 152 [2020-04-17 18:42:09,317 INFO L226 Difference]: Without dead ends: 150 [2020-04-17 18:42:09,318 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:09,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-04-17 18:42:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-04-17 18:42:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 18:42:09,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-04-17 18:42:09,321 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-04-17 18:42:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:09,322 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-04-17 18:42:09,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:09,322 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-04-17 18:42:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:09,322 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:09,323 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:09,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:09,526 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:09,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-04-17 18:42:09,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:09,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985541423] [2020-04-17 18:42:09,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985541423] [2020-04-17 18:42:09,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159170892] [2020-04-17 18:42:09,599 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:09,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:09,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:09,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:09,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:09,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:09,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400799670] [2020-04-17 18:42:09,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:09,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:09,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:09,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:09,740 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-04-17 18:42:09,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:09,875 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-04-17 18:42:09,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:09,875 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:09,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:09,877 INFO L225 Difference]: With dead ends: 153 [2020-04-17 18:42:09,877 INFO L226 Difference]: Without dead ends: 151 [2020-04-17 18:42:09,878 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-04-17 18:42:09,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-04-17 18:42:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 18:42:09,881 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 18:42:09,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:09,881 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 18:42:09,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:09,881 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 18:42:09,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:09,882 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:09,882 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:10,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:10,085 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:10,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-04-17 18:42:10,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:10,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093564818] [2020-04-17 18:42:10,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093564818] [2020-04-17 18:42:10,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243684196] [2020-04-17 18:42:10,145 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:10,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:10,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:10,187 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:10,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:10,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:10,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191042168] [2020-04-17 18:42:10,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:10,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:10,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:10,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:10,275 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 18:42:10,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:10,417 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 18:42:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:10,417 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:10,419 INFO L225 Difference]: With dead ends: 156 [2020-04-17 18:42:10,419 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 18:42:10,420 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 18:42:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-04-17 18:42:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 18:42:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-04-17 18:42:10,424 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-04-17 18:42:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:10,424 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-04-17 18:42:10,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-04-17 18:42:10,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:10,425 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:10,425 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:10,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:10,628 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:10,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:10,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-04-17 18:42:10,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:10,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063247710] [2020-04-17 18:42:10,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063247710] [2020-04-17 18:42:10,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719468101] [2020-04-17 18:42:10,699 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 [2020-04-17 18:42:10,741 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:10,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:10,742 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:10,743 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:10,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:10,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582037438] [2020-04-17 18:42:10,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:10,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:10,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:10,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:10,826 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-04-17 18:42:10,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:10,917 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-04-17 18:42:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:10,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:10,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:10,919 INFO L225 Difference]: With dead ends: 148 [2020-04-17 18:42:10,919 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 18:42:10,919 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 18:42:10,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-04-17 18:42:10,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 18:42:10,923 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 18:42:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:10,924 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 18:42:10,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:10,924 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 18:42:10,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:10,924 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:10,924 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:11,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:11,128 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:11,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:11,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-04-17 18:42:11,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:11,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634665345] [2020-04-17 18:42:11,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634665345] [2020-04-17 18:42:11,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009567717] [2020-04-17 18:42:11,199 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:11,241 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:11,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:11,242 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:11,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:11,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:11,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724928963] [2020-04-17 18:42:11,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:11,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:11,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:11,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:11,325 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 18:42:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:11,491 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-04-17 18:42:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:11,491 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:11,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:11,493 INFO L225 Difference]: With dead ends: 157 [2020-04-17 18:42:11,493 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 18:42:11,493 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 18:42:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-04-17 18:42:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-04-17 18:42:11,497 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-04-17 18:42:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:11,497 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-04-17 18:42:11,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-04-17 18:42:11,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:11,498 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:11,498 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:11,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:11,701 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-04-17 18:42:11,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:11,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065700269] [2020-04-17 18:42:11,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065700269] [2020-04-17 18:42:11,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167741623] [2020-04-17 18:42:11,805 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:11,845 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:11,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:11,846 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:11,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:11,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:11,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262246628] [2020-04-17 18:42:11,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:11,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:11,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:11,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:11,924 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-04-17 18:42:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:12,034 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-04-17 18:42:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:12,035 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:12,036 INFO L225 Difference]: With dead ends: 149 [2020-04-17 18:42:12,036 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 18:42:12,037 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 18:42:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-04-17 18:42:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 18:42:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 18:42:12,040 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 18:42:12,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:12,040 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 18:42:12,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:12,040 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 18:42:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:12,041 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:12,041 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:12,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:12,242 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:12,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:12,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-04-17 18:42:12,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:12,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95797637] [2020-04-17 18:42:12,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:12,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95797637] [2020-04-17 18:42:12,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114634953] [2020-04-17 18:42:12,299 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:12,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:12,366 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:12,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:12,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:12,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:12,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749018563] [2020-04-17 18:42:12,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:12,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:12,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:12,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:12,477 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 18:42:12,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:12,696 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-04-17 18:42:12,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:12,696 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:12,698 INFO L225 Difference]: With dead ends: 164 [2020-04-17 18:42:12,698 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 18:42:12,699 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:12,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 18:42:12,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 18:42:12,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 18:42:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-04-17 18:42:12,704 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-04-17 18:42:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:12,704 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-04-17 18:42:12,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-04-17 18:42:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:12,706 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:12,706 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:12,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:12,911 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:12,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-04-17 18:42:12,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:12,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464203177] [2020-04-17 18:42:12,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:12,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464203177] [2020-04-17 18:42:12,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406141775] [2020-04-17 18:42:12,971 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:13,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:13,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:13,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:13,016 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:13,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:13,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865264292] [2020-04-17 18:42:13,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:13,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:13,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:13,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:13,113 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-04-17 18:42:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:13,281 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 18:42:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:13,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:13,282 INFO L225 Difference]: With dead ends: 156 [2020-04-17 18:42:13,282 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 18:42:13,283 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 18:42:13,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-04-17 18:42:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 18:42:13,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 18:42:13,286 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 18:42:13,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:13,287 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 18:42:13,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:13,287 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 18:42:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:13,287 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:13,287 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:13,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:13,488 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:13,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-04-17 18:42:13,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:13,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660726757] [2020-04-17 18:42:13,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660726757] [2020-04-17 18:42:13,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515162812] [2020-04-17 18:42:13,544 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:13,583 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:13,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:13,584 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:13,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:13,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:13,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:13,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609194822] [2020-04-17 18:42:13,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:13,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:13,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:13,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:13,701 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 18:42:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:14,061 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-04-17 18:42:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:42:14,062 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:14,063 INFO L225 Difference]: With dead ends: 176 [2020-04-17 18:42:14,063 INFO L226 Difference]: Without dead ends: 171 [2020-04-17 18:42:14,064 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:42:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-04-17 18:42:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-04-17 18:42:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 18:42:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 18:42:14,068 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 18:42:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:14,068 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 18:42:14,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 18:42:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:14,069 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:14,069 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:14,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:14,272 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:14,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:14,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-04-17 18:42:14,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:14,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962063576] [2020-04-17 18:42:14,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:14,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962063576] [2020-04-17 18:42:14,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858464264] [2020-04-17 18:42:14,343 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:14,388 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:14,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:14,389 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:14,390 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:14,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:14,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:14,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:14,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336861063] [2020-04-17 18:42:14,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:14,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:14,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:14,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:14,480 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 18:42:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:14,733 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-04-17 18:42:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:14,734 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:14,735 INFO L225 Difference]: With dead ends: 166 [2020-04-17 18:42:14,735 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 18:42:14,735 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 18:42:14,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-04-17 18:42:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-04-17 18:42:14,738 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-04-17 18:42:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:14,739 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-04-17 18:42:14,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-04-17 18:42:14,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:14,740 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:14,740 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:14,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:14,943 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:14,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-04-17 18:42:14,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:14,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550838390] [2020-04-17 18:42:14,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550838390] [2020-04-17 18:42:15,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799528539] [2020-04-17 18:42:15,004 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:15,050 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:15,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:15,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:15,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:15,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:15,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433061313] [2020-04-17 18:42:15,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:15,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:15,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:15,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:15,144 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-04-17 18:42:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:15,318 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-04-17 18:42:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:15,321 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:15,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:15,323 INFO L225 Difference]: With dead ends: 163 [2020-04-17 18:42:15,323 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 18:42:15,323 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:15,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 18:42:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-04-17 18:42:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-04-17 18:42:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-04-17 18:42:15,326 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-04-17 18:42:15,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:15,326 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-04-17 18:42:15,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-04-17 18:42:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:15,327 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:15,327 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:15,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:15,531 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:15,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-04-17 18:42:15,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:15,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421565843] [2020-04-17 18:42:15,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421565843] [2020-04-17 18:42:15,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814237072] [2020-04-17 18:42:15,589 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:15,631 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:15,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:15,632 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:15,633 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:15,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:15,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651174141] [2020-04-17 18:42:15,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:15,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:15,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:15,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:15,738 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-04-17 18:42:16,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:16,037 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-04-17 18:42:16,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:16,037 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:16,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:16,039 INFO L225 Difference]: With dead ends: 170 [2020-04-17 18:42:16,039 INFO L226 Difference]: Without dead ends: 168 [2020-04-17 18:42:16,039 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:42:16,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-04-17 18:42:16,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-04-17 18:42:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-04-17 18:42:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-04-17 18:42:16,043 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-04-17 18:42:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:16,043 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-04-17 18:42:16,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:16,043 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-04-17 18:42:16,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:16,044 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:16,044 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:16,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:16,247 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:16,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:16,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-04-17 18:42:16,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:16,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700076740] [2020-04-17 18:42:16,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:16,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700076740] [2020-04-17 18:42:16,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308253967] [2020-04-17 18:42:16,303 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:16,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:16,346 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:16,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:16,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:16,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:16,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480783346] [2020-04-17 18:42:16,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:16,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:16,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:16,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:16,421 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-04-17 18:42:16,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:16,726 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-04-17 18:42:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:16,727 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:16,728 INFO L225 Difference]: With dead ends: 177 [2020-04-17 18:42:16,728 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 18:42:16,728 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:42:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 18:42:16,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-04-17 18:42:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-04-17 18:42:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-04-17 18:42:16,731 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-04-17 18:42:16,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:16,731 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-04-17 18:42:16,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-04-17 18:42:16,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:16,732 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:16,732 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:16,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:16,936 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:16,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-04-17 18:42:16,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:16,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458768855] [2020-04-17 18:42:16,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:16,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458768855] [2020-04-17 18:42:16,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554650173] [2020-04-17 18:42:16,990 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:17,044 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:17,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:17,045 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:17,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:17,132 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:17,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:17,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:17,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656714329] [2020-04-17 18:42:17,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:17,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:17,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:17,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:17,140 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-04-17 18:42:17,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:17,479 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-04-17 18:42:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:42:17,479 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:17,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:17,481 INFO L225 Difference]: With dead ends: 190 [2020-04-17 18:42:17,481 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 18:42:17,481 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:42:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 18:42:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-04-17 18:42:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-04-17 18:42:17,485 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-04-17 18:42:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:17,485 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-04-17 18:42:17,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-04-17 18:42:17,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:17,486 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:17,486 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:17,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:17,687 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:17,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:17,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-04-17 18:42:17,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:17,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375850994] [2020-04-17 18:42:17,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:17,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375850994] [2020-04-17 18:42:17,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196975778] [2020-04-17 18:42:17,741 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:17,782 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:42:17,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:17,783 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:17,783 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:17,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:17,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:17,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:17,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163396494] [2020-04-17 18:42:17,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:17,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:17,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:17,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:17,858 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-04-17 18:42:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:18,187 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-04-17 18:42:18,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:18,188 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:18,189 INFO L225 Difference]: With dead ends: 180 [2020-04-17 18:42:18,189 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 18:42:18,189 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:42:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 18:42:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-04-17 18:42:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-04-17 18:42:18,193 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-04-17 18:42:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:18,193 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-04-17 18:42:18,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-04-17 18:42:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:18,194 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:18,194 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:18,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:18,397 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:18,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-04-17 18:42:18,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:18,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195762113] [2020-04-17 18:42:18,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:18,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195762113] [2020-04-17 18:42:18,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391211712] [2020-04-17 18:42:18,454 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:18,500 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:18,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:18,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:18,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:18,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:18,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:18,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317361881] [2020-04-17 18:42:18,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:18,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:18,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:18,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:18,590 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-04-17 18:42:18,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:18,722 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-04-17 18:42:18,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:18,723 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:18,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:18,724 INFO L225 Difference]: With dead ends: 164 [2020-04-17 18:42:18,725 INFO L226 Difference]: Without dead ends: 162 [2020-04-17 18:42:18,725 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-04-17 18:42:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-04-17 18:42:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-04-17 18:42:18,728 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-04-17 18:42:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:18,729 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-04-17 18:42:18,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:18,729 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-04-17 18:42:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:18,729 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:18,729 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:18,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:18,932 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:18,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-04-17 18:42:18,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:18,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881302298] [2020-04-17 18:42:18,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:18,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881302298] [2020-04-17 18:42:18,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830225793] [2020-04-17 18:42:18,993 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,033 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:19,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:19,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:19,035 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:19,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:19,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076906926] [2020-04-17 18:42:19,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:19,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:19,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:19,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:19,124 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-04-17 18:42:19,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:19,310 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-04-17 18:42:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:19,311 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:19,312 INFO L225 Difference]: With dead ends: 161 [2020-04-17 18:42:19,312 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 18:42:19,312 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 18:42:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-04-17 18:42:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-04-17 18:42:19,315 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-04-17 18:42:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:19,316 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-04-17 18:42:19,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:19,316 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-04-17 18:42:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:19,316 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:19,316 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:19,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,520 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:19,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:19,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-04-17 18:42:19,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:19,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840151798] [2020-04-17 18:42:19,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840151798] [2020-04-17 18:42:19,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711627678] [2020-04-17 18:42:19,587 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,634 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:42:19,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:19,635 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:19,636 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:19,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:19,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7985055] [2020-04-17 18:42:19,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:19,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:19,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:19,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:19,734 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-04-17 18:42:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:19,918 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-04-17 18:42:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:19,918 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:19,920 INFO L225 Difference]: With dead ends: 165 [2020-04-17 18:42:19,920 INFO L226 Difference]: Without dead ends: 163 [2020-04-17 18:42:19,920 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-04-17 18:42:19,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-04-17 18:42:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-04-17 18:42:19,927 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-04-17 18:42:19,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:19,927 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-04-17 18:42:19,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:19,927 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-04-17 18:42:19,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:19,928 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:19,928 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:20,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,131 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:20,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-04-17 18:42:20,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:20,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240721146] [2020-04-17 18:42:20,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240721146] [2020-04-17 18:42:20,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949688764] [2020-04-17 18:42:20,197 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:20,236 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:20,237 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:20,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:20,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606002773] [2020-04-17 18:42:20,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:20,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:20,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:20,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:20,318 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-04-17 18:42:20,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:20,509 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-04-17 18:42:20,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:20,509 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:20,510 INFO L225 Difference]: With dead ends: 167 [2020-04-17 18:42:20,510 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 18:42:20,510 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 18:42:20,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-04-17 18:42:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 18:42:20,513 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 18:42:20,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:20,513 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 18:42:20,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:20,513 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 18:42:20,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:20,514 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:20,514 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:20,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,715 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:20,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:20,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-04-17 18:42:20,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:20,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472470191] [2020-04-17 18:42:20,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472470191] [2020-04-17 18:42:20,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211910647] [2020-04-17 18:42:20,764 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:20,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:20,803 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:20,804 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:20,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:20,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649705161] [2020-04-17 18:42:20,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:20,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:20,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:20,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:20,882 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 18:42:21,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:21,145 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-04-17 18:42:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:42:21,145 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:21,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:21,146 INFO L225 Difference]: With dead ends: 168 [2020-04-17 18:42:21,146 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 18:42:21,147 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:21,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 18:42:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-04-17 18:42:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 18:42:21,151 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 18:42:21,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:21,152 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 18:42:21,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 18:42:21,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:21,152 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:21,152 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:21,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:21,356 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-04-17 18:42:21,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:21,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419364409] [2020-04-17 18:42:21,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:21,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419364409] [2020-04-17 18:42:21,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593711822] [2020-04-17 18:42:21,423 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:21,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:21,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:21,464 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:21,465 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:21,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:21,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:21,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:21,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750482771] [2020-04-17 18:42:21,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:21,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:21,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:21,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:21,527 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 18:42:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:21,726 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-04-17 18:42:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:21,732 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:21,733 INFO L225 Difference]: With dead ends: 160 [2020-04-17 18:42:21,733 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 18:42:21,733 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 18:42:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-04-17 18:42:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 18:42:21,736 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 18:42:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:21,737 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 18:42:21,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 18:42:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:21,747 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:21,747 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:21,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:21,950 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:21,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:21,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-04-17 18:42:21,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:21,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013512391] [2020-04-17 18:42:21,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013512391] [2020-04-17 18:42:22,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018724033] [2020-04-17 18:42:22,009 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:22,049 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:22,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:22,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:22,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:22,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:22,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:22,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495013734] [2020-04-17 18:42:22,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:22,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:22,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:22,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:22,119 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 18:42:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:22,434 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-04-17 18:42:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:22,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:22,436 INFO L225 Difference]: With dead ends: 189 [2020-04-17 18:42:22,436 INFO L226 Difference]: Without dead ends: 181 [2020-04-17 18:42:22,437 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:42:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-04-17 18:42:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-04-17 18:42:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 18:42:22,440 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 18:42:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:22,441 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 18:42:22,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 18:42:22,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:22,441 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:22,441 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:22,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:22,642 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:22,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-04-17 18:42:22,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:22,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281920570] [2020-04-17 18:42:22,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281920570] [2020-04-17 18:42:22,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210298255] [2020-04-17 18:42:22,700 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:22,738 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:22,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:22,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:22,740 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:22,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:22,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663981296] [2020-04-17 18:42:22,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:22,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:22,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:22,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:22,813 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 18:42:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:23,031 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-04-17 18:42:23,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:42:23,032 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:23,033 INFO L225 Difference]: With dead ends: 169 [2020-04-17 18:42:23,033 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 18:42:23,034 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:23,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 18:42:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-04-17 18:42:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 18:42:23,037 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 18:42:23,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:23,037 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 18:42:23,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 18:42:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:23,038 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:23,038 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:23,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:23,239 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:23,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:23,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-04-17 18:42:23,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:23,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949369875] [2020-04-17 18:42:23,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:23,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949369875] [2020-04-17 18:42:23,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840873307] [2020-04-17 18:42:23,289 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:23,330 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:23,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:23,331 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:23,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:23,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:23,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:23,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:23,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361877441] [2020-04-17 18:42:23,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:23,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:23,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:23,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:23,410 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 18:42:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:23,738 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-04-17 18:42:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:42:23,739 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:23,741 INFO L225 Difference]: With dead ends: 192 [2020-04-17 18:42:23,741 INFO L226 Difference]: Without dead ends: 184 [2020-04-17 18:42:23,741 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:42:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-04-17 18:42:23,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-04-17 18:42:23,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 18:42:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-04-17 18:42:23,745 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-04-17 18:42:23,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:23,745 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-04-17 18:42:23,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-04-17 18:42:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:23,746 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:23,746 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:23,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:23,954 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:23,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:23,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-04-17 18:42:23,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:23,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543260009] [2020-04-17 18:42:23,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:24,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543260009] [2020-04-17 18:42:24,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470324866] [2020-04-17 18:42:24,009 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:24,066 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:24,067 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:24,152 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:24,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:24,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:24,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582852829] [2020-04-17 18:42:24,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:24,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:24,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:24,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:24,165 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-04-17 18:42:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:24,474 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-04-17 18:42:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:24,474 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:24,476 INFO L225 Difference]: With dead ends: 180 [2020-04-17 18:42:24,476 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 18:42:24,476 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:42:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 18:42:24,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-04-17 18:42:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 18:42:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-04-17 18:42:24,480 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-04-17 18:42:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:24,481 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-04-17 18:42:24,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-04-17 18:42:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:24,482 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:24,483 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:24,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:24,687 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:24,688 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-04-17 18:42:24,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:24,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251036835] [2020-04-17 18:42:24,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:24,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251036835] [2020-04-17 18:42:24,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388392762] [2020-04-17 18:42:24,779 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:24,827 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:24,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:24,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:24,830 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:24,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:25,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:25,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:42:25,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770395052] [2020-04-17 18:42:25,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:42:25,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:25,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:42:25,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:25,031 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-04-17 18:42:25,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:25,261 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-04-17 18:42:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:25,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-04-17 18:42:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:25,264 INFO L225 Difference]: With dead ends: 164 [2020-04-17 18:42:25,264 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 18:42:25,264 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:42:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 18:42:25,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 18:42:25,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 18:42:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-04-17 18:42:25,269 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-04-17 18:42:25,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:25,270 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-04-17 18:42:25,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:42:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-04-17 18:42:25,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:25,271 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:25,271 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:25,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:25,476 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:25,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:25,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-04-17 18:42:25,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:25,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478134943] [2020-04-17 18:42:25,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:25,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478134943] [2020-04-17 18:42:25,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860528152] [2020-04-17 18:42:25,625 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:25,681 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:42:25,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:25,682 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:25,683 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:25,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:25,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:25,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50126177] [2020-04-17 18:42:25,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:25,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:25,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:25,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:25,815 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-04-17 18:42:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:25,862 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 18:42:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:25,862 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:25,864 INFO L225 Difference]: With dead ends: 156 [2020-04-17 18:42:25,864 INFO L226 Difference]: Without dead ends: 153 [2020-04-17 18:42:25,864 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:25,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-04-17 18:42:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-04-17 18:42:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 18:42:25,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 18:42:25,870 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 18:42:25,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:25,870 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 18:42:25,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:25,870 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 18:42:25,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:25,871 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:25,871 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:26,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:26,075 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:26,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-04-17 18:42:26,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:26,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171567470] [2020-04-17 18:42:26,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171567470] [2020-04-17 18:42:26,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434908057] [2020-04-17 18:42:26,183 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:26,224 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:26,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:26,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:26,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:26,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:26,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865157495] [2020-04-17 18:42:26,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:26,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:26,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:26,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:26,320 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 18:42:26,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:26,404 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-04-17 18:42:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:26,405 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:26,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:26,406 INFO L225 Difference]: With dead ends: 170 [2020-04-17 18:42:26,406 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 18:42:26,406 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 18:42:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-04-17 18:42:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 18:42:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 18:42:26,408 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 18:42:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:26,409 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 18:42:26,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 18:42:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:26,409 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:26,410 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:26,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:26,613 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:26,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:26,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-04-17 18:42:26,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:26,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658340074] [2020-04-17 18:42:26,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658340074] [2020-04-17 18:42:26,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882623806] [2020-04-17 18:42:26,708 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:26,748 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:26,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:26,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:26,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:26,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:26,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301910246] [2020-04-17 18:42:26,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:26,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:26,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:26,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:26,846 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 18:42:26,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:26,928 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-04-17 18:42:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:26,928 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:26,929 INFO L225 Difference]: With dead ends: 169 [2020-04-17 18:42:26,929 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 18:42:26,930 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 18:42:26,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-04-17 18:42:26,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 18:42:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-04-17 18:42:26,933 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-04-17 18:42:26,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:26,933 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-04-17 18:42:26,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:26,933 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-04-17 18:42:26,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:26,934 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:26,934 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:27,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,138 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:27,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:27,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-04-17 18:42:27,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:27,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402218011] [2020-04-17 18:42:27,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402218011] [2020-04-17 18:42:27,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904869996] [2020-04-17 18:42:27,255 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,344 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:42:27,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:27,346 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:27,347 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:27,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:27,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435905239] [2020-04-17 18:42:27,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:27,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:27,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:27,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:27,508 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-04-17 18:42:27,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:27,652 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-04-17 18:42:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:27,653 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:27,654 INFO L225 Difference]: With dead ends: 168 [2020-04-17 18:42:27,654 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 18:42:27,655 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 18:42:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-04-17 18:42:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 18:42:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-04-17 18:42:27,660 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-04-17 18:42:27,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:27,661 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-04-17 18:42:27,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:27,661 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-04-17 18:42:27,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:27,662 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:27,662 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:27,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,867 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:27,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:27,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-04-17 18:42:27,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:27,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329968148] [2020-04-17 18:42:27,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329968148] [2020-04-17 18:42:27,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775331335] [2020-04-17 18:42:27,940 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:27,982 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:27,982 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:28,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:28,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:28,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412859575] [2020-04-17 18:42:28,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:28,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:28,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:28,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:28,080 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-04-17 18:42:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:28,212 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-04-17 18:42:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:28,212 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:28,214 INFO L225 Difference]: With dead ends: 167 [2020-04-17 18:42:28,214 INFO L226 Difference]: Without dead ends: 164 [2020-04-17 18:42:28,214 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-04-17 18:42:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-04-17 18:42:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 18:42:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-04-17 18:42:28,217 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-04-17 18:42:28,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:28,217 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-04-17 18:42:28,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:28,217 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-04-17 18:42:28,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:28,218 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:28,218 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:28,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:28,421 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:28,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:28,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-04-17 18:42:28,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:28,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664232] [2020-04-17 18:42:28,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:28,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664232] [2020-04-17 18:42:28,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999925277] [2020-04-17 18:42:28,492 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:28,532 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:28,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:28,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:28,534 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:28,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:28,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:28,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:28,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501019276] [2020-04-17 18:42:28,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:28,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:28,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:28,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:28,625 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-04-17 18:42:28,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:28,799 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-04-17 18:42:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:28,800 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:28,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:28,802 INFO L225 Difference]: With dead ends: 176 [2020-04-17 18:42:28,802 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 18:42:28,802 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 18:42:28,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-04-17 18:42:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 18:42:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-04-17 18:42:28,805 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-04-17 18:42:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:28,805 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-04-17 18:42:28,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:28,806 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-04-17 18:42:28,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:28,806 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:28,806 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:29,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,007 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:29,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-04-17 18:42:29,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:29,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433126047] [2020-04-17 18:42:29,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433126047] [2020-04-17 18:42:29,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185909655] [2020-04-17 18:42:29,084 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,127 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:29,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:29,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:29,128 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:29,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:29,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743170362] [2020-04-17 18:42:29,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:29,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:29,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:29,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:29,235 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-04-17 18:42:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:29,288 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-04-17 18:42:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:29,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:29,290 INFO L225 Difference]: With dead ends: 163 [2020-04-17 18:42:29,290 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 18:42:29,290 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 18:42:29,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-04-17 18:42:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 18:42:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-04-17 18:42:29,293 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-04-17 18:42:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:29,293 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-04-17 18:42:29,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-04-17 18:42:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:29,294 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:29,294 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:29,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,495 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:29,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-04-17 18:42:29,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:29,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144028398] [2020-04-17 18:42:29,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144028398] [2020-04-17 18:42:29,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892519994] [2020-04-17 18:42:29,573 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:29,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:29,614 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:29,615 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:29,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:29,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141337560] [2020-04-17 18:42:29,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:29,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:29,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:29,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:29,722 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-04-17 18:42:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:29,859 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-04-17 18:42:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:29,859 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:29,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:29,861 INFO L225 Difference]: With dead ends: 172 [2020-04-17 18:42:29,861 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 18:42:29,861 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 18:42:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-04-17 18:42:29,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:42:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 18:42:29,864 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 18:42:29,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:29,865 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 18:42:29,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:29,865 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 18:42:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:29,865 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:29,865 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:30,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:30,066 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:30,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-04-17 18:42:30,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:30,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108369073] [2020-04-17 18:42:30,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:30,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108369073] [2020-04-17 18:42:30,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810294062] [2020-04-17 18:42:30,158 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:30,197 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:30,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:30,198 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:30,199 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:36,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:36,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:42:36,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299551635] [2020-04-17 18:42:36,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:42:36,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:36,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:42:36,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=157, Unknown=3, NotChecked=0, Total=240 [2020-04-17 18:42:36,787 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 16 states. [2020-04-17 18:42:38,970 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 24 [2020-04-17 18:42:47,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:47,881 INFO L93 Difference]: Finished difference Result 185 states and 440 transitions. [2020-04-17 18:42:47,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:47,881 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 18:42:47,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:47,883 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:42:47,883 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 18:42:47,883 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=148, Invalid=269, Unknown=3, NotChecked=0, Total=420 [2020-04-17 18:42:47,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 18:42:47,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 134. [2020-04-17 18:42:47,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 18:42:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-04-17 18:42:47,886 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-04-17 18:42:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:47,886 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-04-17 18:42:47,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:42:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-04-17 18:42:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:47,887 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:47,889 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:48,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:48,090 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:48,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:48,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-04-17 18:42:48,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:48,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25820818] [2020-04-17 18:42:48,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:48,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25820818] [2020-04-17 18:42:48,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712485441] [2020-04-17 18:42:48,175 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:48,217 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:48,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:48,218 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:48,219 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:48,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:48,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:48,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036563191] [2020-04-17 18:42:48,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:48,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:48,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:48,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:48,350 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-04-17 18:42:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:48,516 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 18:42:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:48,517 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:48,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:48,518 INFO L225 Difference]: With dead ends: 179 [2020-04-17 18:42:48,518 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 18:42:48,519 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:48,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 18:42:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-04-17 18:42:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:42:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 18:42:48,522 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 18:42:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:48,522 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 18:42:48,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 18:42:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:48,523 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:48,523 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:48,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:48,726 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-04-17 18:42:48,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:48,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886329370] [2020-04-17 18:42:48,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:48,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886329370] [2020-04-17 18:42:48,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466517336] [2020-04-17 18:42:48,816 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:48,857 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:48,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:48,858 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:48,858 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:48,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:48,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:48,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142913920] [2020-04-17 18:42:48,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:48,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:48,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:48,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:48,968 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 18:42:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:49,163 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-04-17 18:42:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:49,163 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:49,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:49,165 INFO L225 Difference]: With dead ends: 184 [2020-04-17 18:42:49,165 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 18:42:49,165 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:49,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 18:42:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-04-17 18:42:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:42:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-04-17 18:42:49,168 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-04-17 18:42:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:49,168 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-04-17 18:42:49,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-04-17 18:42:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:49,169 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:49,169 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:49,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:49,370 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:49,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:49,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-04-17 18:42:49,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:49,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487211824] [2020-04-17 18:42:49,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:49,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487211824] [2020-04-17 18:42:49,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559867029] [2020-04-17 18:42:49,446 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:49,495 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:49,496 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:50,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:50,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:50,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331620273] [2020-04-17 18:42:50,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:50,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:50,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:50,017 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-04-17 18:42:50,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:50,234 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-04-17 18:42:50,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:50,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:50,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:50,236 INFO L225 Difference]: With dead ends: 179 [2020-04-17 18:42:50,236 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 18:42:50,236 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 18:42:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-04-17 18:42:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-04-17 18:42:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-04-17 18:42:50,240 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-04-17 18:42:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:50,241 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-04-17 18:42:50,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-04-17 18:42:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:50,241 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:50,241 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:50,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:50,444 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:50,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-04-17 18:42:50,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:50,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717939080] [2020-04-17 18:42:50,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:50,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717939080] [2020-04-17 18:42:50,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469656668] [2020-04-17 18:42:50,536 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:50,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:50,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:50,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:50,602 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:50,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:50,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:50,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380203030] [2020-04-17 18:42:50,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:50,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:50,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:50,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:50,726 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-04-17 18:42:50,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:50,890 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-04-17 18:42:50,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:50,891 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:50,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:50,892 INFO L225 Difference]: With dead ends: 176 [2020-04-17 18:42:50,892 INFO L226 Difference]: Without dead ends: 174 [2020-04-17 18:42:50,893 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:50,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-04-17 18:42:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-04-17 18:42:50,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:42:50,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-04-17 18:42:50,897 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-04-17 18:42:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:50,897 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-04-17 18:42:50,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-04-17 18:42:50,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:50,898 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:50,898 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:51,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:51,101 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-04-17 18:42:51,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:51,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740612732] [2020-04-17 18:42:51,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:51,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740612732] [2020-04-17 18:42:51,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020419651] [2020-04-17 18:42:51,193 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:51,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:42:51,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:51,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:51,235 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:51,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:51,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:51,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731988465] [2020-04-17 18:42:51,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:51,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:51,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:51,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:51,363 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-04-17 18:42:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:51,599 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 18:42:51,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:51,599 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:51,601 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:42:51,601 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 18:42:51,601 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:51,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 18:42:51,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-04-17 18:42:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:42:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-04-17 18:42:51,605 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-04-17 18:42:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:51,605 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-04-17 18:42:51,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-04-17 18:42:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:51,606 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:51,606 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:51,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:51,807 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:51,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-04-17 18:42:51,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:51,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467096049] [2020-04-17 18:42:51,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:51,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467096049] [2020-04-17 18:42:51,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619147150] [2020-04-17 18:42:51,899 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:51,943 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:51,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:51,944 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:51,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:52,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:52,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:52,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091168785] [2020-04-17 18:42:52,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:52,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:52,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:52,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:52,044 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-04-17 18:42:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:52,242 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 18:42:52,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:52,243 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:52,244 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:42:52,244 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 18:42:52,245 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 18:42:52,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-04-17 18:42:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 18:42:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-04-17 18:42:52,248 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-04-17 18:42:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:52,248 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-04-17 18:42:52,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-04-17 18:42:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:52,249 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:52,249 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:52,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:52,453 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:52,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-04-17 18:42:52,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:52,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177714819] [2020-04-17 18:42:52,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:52,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177714819] [2020-04-17 18:42:52,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338083614] [2020-04-17 18:42:52,570 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:52,609 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:52,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:52,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:52,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:52,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:52,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:52,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009640902] [2020-04-17 18:42:52,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:52,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:52,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:52,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:52,720 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-04-17 18:42:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:52,810 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-04-17 18:42:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:52,811 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:52,813 INFO L225 Difference]: With dead ends: 182 [2020-04-17 18:42:52,813 INFO L226 Difference]: Without dead ends: 180 [2020-04-17 18:42:52,813 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-04-17 18:42:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-04-17 18:42:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:42:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-04-17 18:42:52,817 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-04-17 18:42:52,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:52,817 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-04-17 18:42:52,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-04-17 18:42:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:52,818 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:52,818 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:53,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:53,022 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:53,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:53,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-04-17 18:42:53,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:53,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961712563] [2020-04-17 18:42:53,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:53,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961712563] [2020-04-17 18:42:53,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856092611] [2020-04-17 18:42:53,128 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:53,167 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:53,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:53,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:53,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:53,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:53,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:53,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170066479] [2020-04-17 18:42:53,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:53,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:53,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:53,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:53,288 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-04-17 18:42:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:53,461 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-04-17 18:42:53,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:42:53,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:53,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:53,463 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:42:53,464 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 18:42:53,464 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:53,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 18:42:53,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-04-17 18:42:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:42:53,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 18:42:53,467 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 18:42:53,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:53,468 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 18:42:53,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:53,468 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 18:42:53,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:53,468 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:53,469 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:53,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:53,671 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:53,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-04-17 18:42:53,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:53,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455314691] [2020-04-17 18:42:53,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:53,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455314691] [2020-04-17 18:42:53,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972483397] [2020-04-17 18:42:53,768 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:53,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:53,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:02,033 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 20 [2020-04-17 18:43:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:02,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:02,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:43:02,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716884281] [2020-04-17 18:43:02,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:43:02,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:02,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:43:02,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=169, Unknown=3, NotChecked=0, Total=240 [2020-04-17 18:43:02,035 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 16 states. [2020-04-17 18:43:04,266 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 24 [2020-04-17 18:43:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:10,856 INFO L93 Difference]: Finished difference Result 201 states and 469 transitions. [2020-04-17 18:43:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:10,856 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 18:43:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:10,858 INFO L225 Difference]: With dead ends: 201 [2020-04-17 18:43:10,858 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 18:43:10,858 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=153, Invalid=306, Unknown=3, NotChecked=0, Total=462 [2020-04-17 18:43:10,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 18:43:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 140. [2020-04-17 18:43:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:43:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-04-17 18:43:10,862 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-04-17 18:43:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:10,862 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-04-17 18:43:10,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:43:10,863 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-04-17 18:43:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:10,863 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:10,863 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:11,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:11,066 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:11,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:11,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-04-17 18:43:11,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:11,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866922677] [2020-04-17 18:43:11,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:11,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866922677] [2020-04-17 18:43:11,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876526364] [2020-04-17 18:43:11,160 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:11,199 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:11,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:11,200 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:11,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:11,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:11,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:11,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690149220] [2020-04-17 18:43:11,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:11,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:11,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:11,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:11,308 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-04-17 18:43:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:11,551 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-04-17 18:43:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:11,551 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:11,553 INFO L225 Difference]: With dead ends: 187 [2020-04-17 18:43:11,553 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 18:43:11,553 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 18:43:11,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-04-17 18:43:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:11,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 18:43:11,556 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 18:43:11,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:11,557 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 18:43:11,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 18:43:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:11,557 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:11,557 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:11,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:11,758 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:11,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-04-17 18:43:11,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:11,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465157839] [2020-04-17 18:43:11,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:11,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465157839] [2020-04-17 18:43:11,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154307371] [2020-04-17 18:43:11,843 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:11,890 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:11,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:11,891 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:11,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:11,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:11,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:11,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80779727] [2020-04-17 18:43:11,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:11,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:11,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:11,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:11,991 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 18:43:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:12,234 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-04-17 18:43:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:12,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:12,236 INFO L225 Difference]: With dead ends: 198 [2020-04-17 18:43:12,236 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 18:43:12,237 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 18:43:12,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-04-17 18:43:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-04-17 18:43:12,240 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-04-17 18:43:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:12,240 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-04-17 18:43:12,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-04-17 18:43:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:12,241 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:12,241 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:12,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:12,442 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:12,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-04-17 18:43:12,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:12,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269472435] [2020-04-17 18:43:12,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:12,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269472435] [2020-04-17 18:43:12,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415244598] [2020-04-17 18:43:12,521 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:12,560 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:12,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:12,561 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:12,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:13,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:13,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:13,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165064715] [2020-04-17 18:43:13,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:13,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:13,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:13,076 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-04-17 18:43:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:13,339 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-04-17 18:43:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:13,339 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:13,341 INFO L225 Difference]: With dead ends: 189 [2020-04-17 18:43:13,341 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 18:43:13,341 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:13,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 18:43:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-04-17 18:43:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:43:13,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-04-17 18:43:13,350 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-04-17 18:43:13,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:13,351 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-04-17 18:43:13,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-04-17 18:43:13,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:13,351 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:13,351 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:13,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:13,552 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-04-17 18:43:13,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:13,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145374983] [2020-04-17 18:43:13,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:13,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145374983] [2020-04-17 18:43:13,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038549204] [2020-04-17 18:43:13,665 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:13,702 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:13,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:13,704 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:13,704 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:13,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:13,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:13,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329958819] [2020-04-17 18:43:13,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:13,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:13,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:13,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:13,813 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-04-17 18:43:13,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:13,895 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-04-17 18:43:13,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:43:13,896 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:13,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:13,897 INFO L225 Difference]: With dead ends: 178 [2020-04-17 18:43:13,897 INFO L226 Difference]: Without dead ends: 176 [2020-04-17 18:43:13,898 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-04-17 18:43:13,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-04-17 18:43:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-04-17 18:43:13,901 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-04-17 18:43:13,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:13,901 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-04-17 18:43:13,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-04-17 18:43:13,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:13,902 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:13,902 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:14,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:14,102 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:14,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:14,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-04-17 18:43:14,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:14,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733325108] [2020-04-17 18:43:14,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:14,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733325108] [2020-04-17 18:43:14,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932261977] [2020-04-17 18:43:14,189 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:14,232 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:14,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:14,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:14,233 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:14,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:14,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:14,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699586699] [2020-04-17 18:43:14,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:14,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:14,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:14,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:14,348 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-04-17 18:43:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:14,542 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-04-17 18:43:14,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:14,543 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:14,544 INFO L225 Difference]: With dead ends: 193 [2020-04-17 18:43:14,544 INFO L226 Difference]: Without dead ends: 191 [2020-04-17 18:43:14,544 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:43:14,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-04-17 18:43:14,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-04-17 18:43:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:14,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-04-17 18:43:14,547 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-04-17 18:43:14,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:14,548 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-04-17 18:43:14,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:14,548 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-04-17 18:43:14,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:14,548 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:14,548 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:14,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:14,751 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:14,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-04-17 18:43:14,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:14,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851734914] [2020-04-17 18:43:14,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:14,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851734914] [2020-04-17 18:43:14,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360766573] [2020-04-17 18:43:14,828 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:14,868 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:14,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:19,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:19,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:19,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000572012] [2020-04-17 18:43:19,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:19,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:19,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:19,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:19,599 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-04-17 18:43:19,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:19,852 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-04-17 18:43:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:19,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:19,854 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:43:19,854 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 18:43:19,854 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:43:19,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 18:43:19,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-04-17 18:43:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:43:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-04-17 18:43:19,858 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-04-17 18:43:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:19,858 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-04-17 18:43:19,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-04-17 18:43:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:19,858 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:19,858 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:20,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:20,059 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:20,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:20,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-04-17 18:43:20,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:20,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783110747] [2020-04-17 18:43:20,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:20,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783110747] [2020-04-17 18:43:20,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263433047] [2020-04-17 18:43:20,151 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:20,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:20,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:20,210 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:20,211 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:20,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:20,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:20,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034605825] [2020-04-17 18:43:20,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:20,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:20,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:20,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:20,335 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-04-17 18:43:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:20,454 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-04-17 18:43:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:43:20,454 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:20,456 INFO L225 Difference]: With dead ends: 174 [2020-04-17 18:43:20,456 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 18:43:20,456 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:43:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 18:43:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-04-17 18:43:20,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-04-17 18:43:20,460 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-04-17 18:43:20,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:20,460 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-04-17 18:43:20,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:20,460 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-04-17 18:43:20,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:20,461 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:20,461 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:20,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:20,661 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:20,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:20,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-04-17 18:43:20,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:20,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713750167] [2020-04-17 18:43:20,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:20,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713750167] [2020-04-17 18:43:20,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541621087] [2020-04-17 18:43:20,741 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:20,781 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:20,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:20,781 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:20,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:20,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:20,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:20,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094433282] [2020-04-17 18:43:20,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:20,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:20,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:20,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:20,895 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-04-17 18:43:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:21,118 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-04-17 18:43:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:21,119 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:21,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:21,120 INFO L225 Difference]: With dead ends: 189 [2020-04-17 18:43:21,120 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 18:43:21,121 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:43:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 18:43:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-04-17 18:43:21,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-04-17 18:43:21,124 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-04-17 18:43:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:21,124 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-04-17 18:43:21,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-04-17 18:43:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:21,125 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:21,125 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:21,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:21,326 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:21,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:21,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-04-17 18:43:21,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:21,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133166200] [2020-04-17 18:43:21,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:21,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133166200] [2020-04-17 18:43:21,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125226737] [2020-04-17 18:43:21,408 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:21,447 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:21,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:21,448 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:21,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:21,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:21,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:21,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634043020] [2020-04-17 18:43:21,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:21,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:21,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:21,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:21,555 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-04-17 18:43:21,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:21,718 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-04-17 18:43:21,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:43:21,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:21,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:21,720 INFO L225 Difference]: With dead ends: 175 [2020-04-17 18:43:21,720 INFO L226 Difference]: Without dead ends: 173 [2020-04-17 18:43:21,720 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:43:21,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-04-17 18:43:21,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-04-17 18:43:21,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:43:21,724 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:43:21,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:21,724 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:43:21,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:43:21,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:21,725 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:21,725 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:21,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:21,929 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:21,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:21,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-04-17 18:43:21,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:21,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708225478] [2020-04-17 18:43:21,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:21,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708225478] [2020-04-17 18:43:21,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797504611] [2020-04-17 18:43:21,997 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:22,038 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:22,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:22,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:22,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:22,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:22,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:22,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:22,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215769778] [2020-04-17 18:43:22,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:22,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:22,144 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 18:43:22,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:22,458 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-04-17 18:43:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:22,459 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:22,460 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:43:22,461 INFO L226 Difference]: Without dead ends: 190 [2020-04-17 18:43:22,461 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:22,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-04-17 18:43:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-04-17 18:43:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 18:43:22,465 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 18:43:22,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:22,465 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 18:43:22,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:22,465 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 18:43:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:22,466 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:22,466 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:22,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:22,669 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:22,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-04-17 18:43:22,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:22,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587901807] [2020-04-17 18:43:22,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:22,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587901807] [2020-04-17 18:43:22,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471291877] [2020-04-17 18:43:22,741 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:22,781 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:22,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:22,782 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:22,783 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:22,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:22,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:22,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952000887] [2020-04-17 18:43:22,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:22,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:22,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:22,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:22,898 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 18:43:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:23,152 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-04-17 18:43:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:43:23,153 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:23,154 INFO L225 Difference]: With dead ends: 187 [2020-04-17 18:43:23,154 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 18:43:23,155 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 18:43:23,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-04-17 18:43:23,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:43:23,158 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:43:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:23,158 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:43:23,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:23,159 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:43:23,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:23,159 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:23,159 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:23,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:23,360 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:23,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:23,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-04-17 18:43:23,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:23,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761386134] [2020-04-17 18:43:23,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:23,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761386134] [2020-04-17 18:43:23,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568495195] [2020-04-17 18:43:23,423 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:23,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:23,464 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:23,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:24,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:24,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:24,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966776989] [2020-04-17 18:43:24,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:24,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:24,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:24,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:24,024 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 18:43:24,535 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-04-17 18:43:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:25,134 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-04-17 18:43:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:43:25,134 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:25,136 INFO L225 Difference]: With dead ends: 212 [2020-04-17 18:43:25,136 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 18:43:25,136 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 18:43:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 18:43:25,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:25,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:43:25,140 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:43:25,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:25,140 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:43:25,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:25,140 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:43:25,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:25,141 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:25,141 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:25,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:25,344 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:25,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-04-17 18:43:25,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:25,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363327294] [2020-04-17 18:43:25,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:25,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363327294] [2020-04-17 18:43:25,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565785779] [2020-04-17 18:43:25,411 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:25,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:25,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:25,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:25,458 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:25,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:26,449 WARN L192 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-04-17 18:43:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:26,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:26,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:43:26,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992963390] [2020-04-17 18:43:26,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:43:26,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:26,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:43:26,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 18:43:26,452 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 16 states. [2020-04-17 18:43:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:26,804 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-04-17 18:43:26,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:26,805 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 18:43:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:26,807 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:43:26,807 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 18:43:26,807 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=208, Invalid=441, Unknown=1, NotChecked=0, Total=650 [2020-04-17 18:43:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 18:43:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-04-17 18:43:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-04-17 18:43:26,811 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-04-17 18:43:26,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:26,811 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-04-17 18:43:26,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:43:26,811 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-04-17 18:43:26,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:26,812 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:26,812 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:27,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:27,013 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:27,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:27,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-04-17 18:43:27,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:27,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307772351] [2020-04-17 18:43:27,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:27,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307772351] [2020-04-17 18:43:27,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130931337] [2020-04-17 18:43:27,088 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:27,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:27,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:27,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:27,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:27,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:27,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:27,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365082194] [2020-04-17 18:43:27,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:27,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:27,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:27,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:27,278 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-04-17 18:43:27,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:27,559 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-04-17 18:43:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:27,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:27,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:27,562 INFO L225 Difference]: With dead ends: 198 [2020-04-17 18:43:27,562 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 18:43:27,562 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 18:43:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-04-17 18:43:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 18:43:27,566 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 18:43:27,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:27,566 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 18:43:27,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 18:43:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:27,567 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:27,567 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:27,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:27,770 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:27,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:27,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-04-17 18:43:27,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:27,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141556551] [2020-04-17 18:43:27,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:27,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141556551] [2020-04-17 18:43:27,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782841943] [2020-04-17 18:43:27,873 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:27,914 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:27,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:27,914 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:27,915 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:28,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:28,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:28,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158273973] [2020-04-17 18:43:28,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:28,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:28,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:28,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:28,084 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 18:43:28,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:28,516 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-04-17 18:43:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:43:28,517 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:28,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:28,518 INFO L225 Difference]: With dead ends: 209 [2020-04-17 18:43:28,518 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 18:43:28,519 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:43:28,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 18:43:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 18:43:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:43:28,523 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:43:28,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:28,523 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:43:28,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:43:28,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:28,523 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:28,524 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:28,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:28,726 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:28,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:28,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-04-17 18:43:28,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:28,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635859647] [2020-04-17 18:43:28,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:28,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635859647] [2020-04-17 18:43:28,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884149299] [2020-04-17 18:43:28,802 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:28,844 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:28,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:28,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:28,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:29,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:29,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:29,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:29,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557083784] [2020-04-17 18:43:29,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:29,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:29,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:29,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:29,023 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 18:43:29,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:29,649 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-04-17 18:43:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:29,650 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:29,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:29,651 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:43:29,651 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 18:43:29,652 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:43:29,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 18:43:29,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-04-17 18:43:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 18:43:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-04-17 18:43:29,655 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-04-17 18:43:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:29,655 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-04-17 18:43:29,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-04-17 18:43:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:29,656 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:29,656 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:29,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:29,860 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:29,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:29,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-04-17 18:43:29,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:29,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160504397] [2020-04-17 18:43:29,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:29,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160504397] [2020-04-17 18:43:29,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930349185] [2020-04-17 18:43:29,928 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:29,968 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:29,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:29,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:29,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:30,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:30,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:30,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:30,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775542354] [2020-04-17 18:43:30,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:30,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:30,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:30,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:30,140 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-04-17 18:43:30,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:30,755 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-04-17 18:43:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:43:30,756 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:30,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:30,757 INFO L225 Difference]: With dead ends: 236 [2020-04-17 18:43:30,758 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 18:43:30,758 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 18:43:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-04-17 18:43:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-04-17 18:43:30,761 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-04-17 18:43:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:30,762 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-04-17 18:43:30,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-04-17 18:43:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:30,762 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:30,762 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:30,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:30,963 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:30,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-04-17 18:43:30,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:30,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860007157] [2020-04-17 18:43:30,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:31,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860007157] [2020-04-17 18:43:31,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489155170] [2020-04-17 18:43:31,038 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:31,081 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:31,081 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:31,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:31,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:31,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:31,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649767509] [2020-04-17 18:43:31,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:31,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:31,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:31,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:31,209 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-04-17 18:43:31,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:31,722 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-04-17 18:43:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:31,722 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:31,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:31,723 INFO L225 Difference]: With dead ends: 219 [2020-04-17 18:43:31,723 INFO L226 Difference]: Without dead ends: 214 [2020-04-17 18:43:31,723 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:43:31,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-04-17 18:43:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-04-17 18:43:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:43:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-04-17 18:43:31,727 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-04-17 18:43:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:31,727 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-04-17 18:43:31,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-04-17 18:43:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:31,728 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:31,728 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:31,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:31,929 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:31,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:31,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-04-17 18:43:31,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:31,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776966612] [2020-04-17 18:43:31,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:31,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776966612] [2020-04-17 18:43:31,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940365536] [2020-04-17 18:43:31,999 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:32,041 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:32,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:32,042 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:32,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:32,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:32,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:32,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034182209] [2020-04-17 18:43:32,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:32,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:32,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:32,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:32,164 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-04-17 18:43:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:32,401 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-04-17 18:43:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:32,402 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:32,403 INFO L225 Difference]: With dead ends: 197 [2020-04-17 18:43:32,403 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 18:43:32,403 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:32,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 18:43:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-04-17 18:43:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-04-17 18:43:32,407 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-04-17 18:43:32,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:32,407 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-04-17 18:43:32,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-04-17 18:43:32,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:32,408 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:32,408 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:32,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:32,611 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:32,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-04-17 18:43:32,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:32,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991843035] [2020-04-17 18:43:32,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:32,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991843035] [2020-04-17 18:43:32,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322041994] [2020-04-17 18:43:32,687 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:32,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:32,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:32,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:32,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:32,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:32,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:32,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841501204] [2020-04-17 18:43:32,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:32,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:32,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:32,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:32,833 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-04-17 18:43:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:33,079 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-04-17 18:43:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:33,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:33,081 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:43:33,081 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 18:43:33,081 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 18:43:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-04-17 18:43:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-04-17 18:43:33,085 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-04-17 18:43:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:33,085 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-04-17 18:43:33,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-04-17 18:43:33,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:33,086 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:33,086 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:33,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:33,289 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:33,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:33,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-04-17 18:43:33,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:33,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304775087] [2020-04-17 18:43:33,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:33,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304775087] [2020-04-17 18:43:33,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231301929] [2020-04-17 18:43:33,354 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:33,393 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:33,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:33,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:33,395 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:33,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:33,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:33,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136401636] [2020-04-17 18:43:33,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:33,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:33,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:33,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:33,974 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-04-17 18:43:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:34,235 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-04-17 18:43:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:34,236 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:34,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:34,237 INFO L225 Difference]: With dead ends: 197 [2020-04-17 18:43:34,237 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 18:43:34,237 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 18:43:34,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-04-17 18:43:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-04-17 18:43:34,241 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-04-17 18:43:34,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:34,241 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-04-17 18:43:34,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:34,241 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-04-17 18:43:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:34,242 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:34,242 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:34,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:34,443 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:34,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:34,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-04-17 18:43:34,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:34,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129953405] [2020-04-17 18:43:34,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:34,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129953405] [2020-04-17 18:43:34,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843176588] [2020-04-17 18:43:34,508 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:34,555 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:34,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:34,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:34,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:34,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:34,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:34,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102138065] [2020-04-17 18:43:34,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:34,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:34,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:34,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:34,674 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-04-17 18:43:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:35,035 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-04-17 18:43:35,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:43:35,036 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:35,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:35,037 INFO L225 Difference]: With dead ends: 214 [2020-04-17 18:43:35,037 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 18:43:35,037 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 18:43:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-04-17 18:43:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-04-17 18:43:35,041 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-04-17 18:43:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:35,041 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-04-17 18:43:35,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-04-17 18:43:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:35,042 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:35,042 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:35,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:35,245 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:35,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:35,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-04-17 18:43:35,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:35,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299777598] [2020-04-17 18:43:35,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:35,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299777598] [2020-04-17 18:43:35,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693498163] [2020-04-17 18:43:35,314 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:35,352 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:35,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:35,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:35,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:35,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:35,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:35,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800357711] [2020-04-17 18:43:35,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:35,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:35,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:35,454 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-04-17 18:43:35,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:35,803 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-04-17 18:43:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:35,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:35,805 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:43:35,805 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 18:43:35,805 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:43:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 18:43:35,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-04-17 18:43:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 18:43:35,809 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 18:43:35,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:35,809 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 18:43:35,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 18:43:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:35,810 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:35,810 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:36,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:36,011 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:36,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:36,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-04-17 18:43:36,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:36,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936958932] [2020-04-17 18:43:36,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:36,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936958932] [2020-04-17 18:43:36,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126659232] [2020-04-17 18:43:36,077 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:36,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:36,117 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:36,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:36,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:36,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660336635] [2020-04-17 18:43:36,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:36,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:36,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:36,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:36,225 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:36,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:36,601 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-04-17 18:43:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:43:36,602 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:36,603 INFO L225 Difference]: With dead ends: 211 [2020-04-17 18:43:36,603 INFO L226 Difference]: Without dead ends: 209 [2020-04-17 18:43:36,603 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:36,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-04-17 18:43:36,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-04-17 18:43:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 18:43:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 18:43:36,607 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 18:43:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:36,608 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 18:43:36,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 18:43:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:36,608 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:36,608 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:36,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:36,811 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-04-17 18:43:36,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:36,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967929794] [2020-04-17 18:43:36,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:36,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967929794] [2020-04-17 18:43:36,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328187028] [2020-04-17 18:43:36,874 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:36,915 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:36,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:36,916 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:36,917 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:36,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:36,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:36,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:36,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88191490] [2020-04-17 18:43:36,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:36,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:36,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:36,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:36,996 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 18:43:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:37,424 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-04-17 18:43:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:43:37,424 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:37,425 INFO L225 Difference]: With dead ends: 211 [2020-04-17 18:43:37,426 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 18:43:37,426 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:43:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 18:43:37,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-04-17 18:43:37,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 18:43:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 18:43:37,429 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 18:43:37,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:37,430 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 18:43:37,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 18:43:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:37,430 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:37,430 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:37,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:37,631 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:37,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-04-17 18:43:37,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:37,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71726869] [2020-04-17 18:43:37,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:37,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71726869] [2020-04-17 18:43:37,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391608462] [2020-04-17 18:43:37,699 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:37,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:37,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:37,740 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:37,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:37,824 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:37,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:37,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:37,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347598625] [2020-04-17 18:43:37,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:37,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:37,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:37,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:37,842 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 18:43:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:38,352 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-04-17 18:43:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:43:38,352 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:38,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:38,353 INFO L225 Difference]: With dead ends: 227 [2020-04-17 18:43:38,353 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 18:43:38,354 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:43:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 18:43:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-04-17 18:43:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 18:43:38,357 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 18:43:38,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:38,357 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 18:43:38,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 18:43:38,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:38,358 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:38,358 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:38,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:38,559 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:38,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:38,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-04-17 18:43:38,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:38,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043879059] [2020-04-17 18:43:38,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:38,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043879059] [2020-04-17 18:43:38,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806223019] [2020-04-17 18:43:38,631 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:38,670 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:38,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:38,670 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:38,671 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:38,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:38,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:38,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249498305] [2020-04-17 18:43:38,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:38,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:38,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:38,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:38,781 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:39,189 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-04-17 18:43:39,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:43:39,189 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:39,190 INFO L225 Difference]: With dead ends: 221 [2020-04-17 18:43:39,190 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 18:43:39,191 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:39,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 18:43:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-04-17 18:43:39,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 18:43:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 18:43:39,194 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 18:43:39,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:39,194 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 18:43:39,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 18:43:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:39,195 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:39,195 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:39,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:39,396 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:39,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-04-17 18:43:39,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:39,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461182116] [2020-04-17 18:43:39,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:39,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461182116] [2020-04-17 18:43:39,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846281268] [2020-04-17 18:43:39,458 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:39,499 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:39,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:39,499 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:39,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:39,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:39,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:39,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:39,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946930275] [2020-04-17 18:43:39,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:39,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:39,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:39,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:39,587 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 18:43:40,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:40,104 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-04-17 18:43:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:40,104 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:40,105 INFO L225 Difference]: With dead ends: 240 [2020-04-17 18:43:40,105 INFO L226 Difference]: Without dead ends: 232 [2020-04-17 18:43:40,106 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-04-17 18:43:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-04-17 18:43:40,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 18:43:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-04-17 18:43:40,109 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-04-17 18:43:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:40,109 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-04-17 18:43:40,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-04-17 18:43:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:40,110 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:40,110 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:40,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:40,311 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:40,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:40,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-04-17 18:43:40,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:40,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556637431] [2020-04-17 18:43:40,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:40,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556637431] [2020-04-17 18:43:40,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722197995] [2020-04-17 18:43:40,384 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:40,423 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:40,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:40,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:40,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:40,497 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:40,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:40,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:40,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251728411] [2020-04-17 18:43:40,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:40,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:40,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:40,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:40,506 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-04-17 18:43:41,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:41,042 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-04-17 18:43:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:41,047 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:41,048 INFO L225 Difference]: With dead ends: 238 [2020-04-17 18:43:41,048 INFO L226 Difference]: Without dead ends: 230 [2020-04-17 18:43:41,048 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-04-17 18:43:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-04-17 18:43:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 18:43:41,052 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 18:43:41,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:41,052 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 18:43:41,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:41,052 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 18:43:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:41,053 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:41,053 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:41,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:41,256 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:41,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-04-17 18:43:41,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:41,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409269552] [2020-04-17 18:43:41,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:41,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409269552] [2020-04-17 18:43:41,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706416962] [2020-04-17 18:43:41,321 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:41,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:41,365 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:41,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:41,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:41,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267221059] [2020-04-17 18:43:41,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:41,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:41,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:41,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:41,969 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 18:43:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:42,208 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-04-17 18:43:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:42,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:42,210 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:43:42,210 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 18:43:42,210 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 18:43:42,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-04-17 18:43:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 18:43:42,213 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 18:43:42,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:42,214 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 18:43:42,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 18:43:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:42,214 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:42,214 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:42,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:42,415 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:42,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:42,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-04-17 18:43:42,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:42,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315908129] [2020-04-17 18:43:42,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:42,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315908129] [2020-04-17 18:43:42,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38730617] [2020-04-17 18:43:42,485 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:42,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:42,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:42,525 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:42,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:42,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:42,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:42,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803492892] [2020-04-17 18:43:42,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:42,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:42,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:42,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:42,644 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 18:43:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:43,075 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-04-17 18:43:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:43,075 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:43,076 INFO L225 Difference]: With dead ends: 206 [2020-04-17 18:43:43,076 INFO L226 Difference]: Without dead ends: 204 [2020-04-17 18:43:43,076 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:43,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-04-17 18:43:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-04-17 18:43:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-04-17 18:43:43,080 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-04-17 18:43:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:43,080 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-04-17 18:43:43,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-04-17 18:43:43,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:43,081 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:43,081 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:43,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:43,282 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:43,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-04-17 18:43:43,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:43,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784973866] [2020-04-17 18:43:43,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:43,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784973866] [2020-04-17 18:43:43,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324214738] [2020-04-17 18:43:43,374 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:43,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:43,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:43,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:43,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:43,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:43,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:43,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:43,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301619140] [2020-04-17 18:43:43,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:43,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:43,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:43,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:43,585 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 15 states. [2020-04-17 18:43:44,555 WARN L192 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-04-17 18:43:45,106 WARN L192 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-17 18:43:45,586 WARN L192 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-04-17 18:43:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:45,893 INFO L93 Difference]: Finished difference Result 234 states and 557 transitions. [2020-04-17 18:43:45,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:45,893 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:45,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:45,894 INFO L225 Difference]: With dead ends: 234 [2020-04-17 18:43:45,894 INFO L226 Difference]: Without dead ends: 229 [2020-04-17 18:43:45,895 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:45,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-04-17 18:43:45,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 139. [2020-04-17 18:43:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:43:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-04-17 18:43:45,899 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-04-17 18:43:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:45,899 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-04-17 18:43:45,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:45,899 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-04-17 18:43:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:45,900 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:45,900 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:46,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:46,101 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:46,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-04-17 18:43:46,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:46,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522659699] [2020-04-17 18:43:46,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:46,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522659699] [2020-04-17 18:43:46,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933555344] [2020-04-17 18:43:46,183 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:46,220 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:46,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:46,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:46,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:46,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:46,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:46,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941720170] [2020-04-17 18:43:46,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:46,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:46,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:46,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:46,350 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-04-17 18:43:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:46,542 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 18:43:46,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:46,542 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:46,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:46,543 INFO L225 Difference]: With dead ends: 194 [2020-04-17 18:43:46,543 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 18:43:46,544 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:43:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 18:43:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-04-17 18:43:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-04-17 18:43:46,547 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-04-17 18:43:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:46,547 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-04-17 18:43:46,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-04-17 18:43:46,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:46,548 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:46,548 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:46,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:46,748 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:46,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-04-17 18:43:46,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:46,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055136913] [2020-04-17 18:43:46,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:46,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055136913] [2020-04-17 18:43:46,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546317673] [2020-04-17 18:43:46,823 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:46,868 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:46,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:46,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:46,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:47,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:47,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:47,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533469535] [2020-04-17 18:43:47,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:47,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:47,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:47,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:47,565 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-04-17 18:43:47,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:47,833 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-04-17 18:43:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:47,834 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:47,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:47,834 INFO L225 Difference]: With dead ends: 205 [2020-04-17 18:43:47,834 INFO L226 Difference]: Without dead ends: 203 [2020-04-17 18:43:47,834 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-04-17 18:43:47,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-04-17 18:43:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-04-17 18:43:47,837 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-04-17 18:43:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:47,837 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-04-17 18:43:47,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-04-17 18:43:47,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:47,838 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:47,838 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:48,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:48,039 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:48,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:48,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-04-17 18:43:48,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:48,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040335890] [2020-04-17 18:43:48,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:48,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040335890] [2020-04-17 18:43:48,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516545697] [2020-04-17 18:43:48,115 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:48,159 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:43:48,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:48,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:48,161 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:48,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:48,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:48,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162945221] [2020-04-17 18:43:48,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:48,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:48,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:48,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:48,253 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-04-17 18:43:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:48,492 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 18:43:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:48,492 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:48,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:48,493 INFO L225 Difference]: With dead ends: 201 [2020-04-17 18:43:48,493 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 18:43:48,493 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 18:43:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-04-17 18:43:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 18:43:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-04-17 18:43:48,497 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-04-17 18:43:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:48,497 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-04-17 18:43:48,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-04-17 18:43:48,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:48,498 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:48,498 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:48,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:48,699 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:48,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:48,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-04-17 18:43:48,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:48,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739476678] [2020-04-17 18:43:48,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:48,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739476678] [2020-04-17 18:43:48,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553376870] [2020-04-17 18:43:48,779 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:48,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:48,840 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:49,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:49,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:49,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668075874] [2020-04-17 18:43:49,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:49,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:49,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:49,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:49,004 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-04-17 18:43:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:49,243 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 18:43:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:49,243 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:49,244 INFO L225 Difference]: With dead ends: 194 [2020-04-17 18:43:49,244 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 18:43:49,245 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:43:49,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 18:43:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-04-17 18:43:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:43:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-04-17 18:43:49,247 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-04-17 18:43:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:49,248 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-04-17 18:43:49,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:49,248 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-04-17 18:43:49,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:49,248 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:49,248 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:49,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:49,452 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:49,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:49,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-04-17 18:43:49,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:49,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093288641] [2020-04-17 18:43:49,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:49,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093288641] [2020-04-17 18:43:49,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248352150] [2020-04-17 18:43:49,517 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:49,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:49,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:49,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:49,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:50,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:50,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:50,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68367919] [2020-04-17 18:43:50,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:50,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:50,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:50,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:50,146 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-04-17 18:43:50,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:50,438 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-04-17 18:43:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:43:50,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:50,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:50,439 INFO L225 Difference]: With dead ends: 209 [2020-04-17 18:43:50,440 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 18:43:50,440 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:43:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 18:43:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-04-17 18:43:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:43:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-04-17 18:43:50,443 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-04-17 18:43:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:50,443 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-04-17 18:43:50,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-04-17 18:43:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:50,443 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:50,444 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:50,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:50,646 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:50,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-04-17 18:43:50,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:50,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41571025] [2020-04-17 18:43:50,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:50,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41571025] [2020-04-17 18:43:50,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465856293] [2020-04-17 18:43:50,712 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:50,751 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:50,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:50,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:50,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:50,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:50,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:50,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980908078] [2020-04-17 18:43:50,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:50,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:50,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:50,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:50,861 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-04-17 18:43:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:51,154 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-04-17 18:43:51,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:43:51,154 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:51,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:51,155 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:43:51,155 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 18:43:51,156 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:51,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 18:43:51,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-04-17 18:43:51,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:43:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-04-17 18:43:51,159 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-04-17 18:43:51,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:51,159 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-04-17 18:43:51,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-04-17 18:43:51,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:51,160 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:51,160 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:51,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:51,361 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-04-17 18:43:51,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:51,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220300638] [2020-04-17 18:43:51,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:51,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220300638] [2020-04-17 18:43:51,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465729724] [2020-04-17 18:43:51,435 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:51,477 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:51,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:51,478 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:51,478 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:51,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:51,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:51,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346853164] [2020-04-17 18:43:51,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:51,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:51,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:51,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:51,583 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-04-17 18:43:51,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:51,849 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 18:43:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:43:51,849 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:51,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:51,850 INFO L225 Difference]: With dead ends: 201 [2020-04-17 18:43:51,850 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 18:43:51,850 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 18:43:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-04-17 18:43:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-04-17 18:43:51,853 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-04-17 18:43:51,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:51,853 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-04-17 18:43:51,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-04-17 18:43:51,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:51,854 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:51,854 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:52,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:52,055 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:52,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:52,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-04-17 18:43:52,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:52,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323088025] [2020-04-17 18:43:52,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:52,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323088025] [2020-04-17 18:43:52,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703906884] [2020-04-17 18:43:52,125 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:52,167 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:52,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:52,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:52,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:52,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:52,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:52,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25341107] [2020-04-17 18:43:52,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:52,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:52,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:52,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:52,384 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-04-17 18:43:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:52,770 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-04-17 18:43:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:43:52,770 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:52,771 INFO L225 Difference]: With dead ends: 215 [2020-04-17 18:43:52,771 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 18:43:52,772 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 18:43:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-04-17 18:43:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 18:43:52,776 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 18:43:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:52,776 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 18:43:52,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 18:43:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:52,776 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:52,777 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:52,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:52,980 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:52,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-04-17 18:43:52,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:52,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020680003] [2020-04-17 18:43:52,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:53,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020680003] [2020-04-17 18:43:53,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330309657] [2020-04-17 18:43:53,048 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:53,088 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:43:53,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:53,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:53,090 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:53,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:53,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:53,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616493181] [2020-04-17 18:43:53,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:53,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:53,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:53,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:53,191 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 18:43:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:53,521 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-04-17 18:43:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:43:53,522 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:53,523 INFO L225 Difference]: With dead ends: 196 [2020-04-17 18:43:53,523 INFO L226 Difference]: Without dead ends: 194 [2020-04-17 18:43:53,524 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:43:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-04-17 18:43:53,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-04-17 18:43:53,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 18:43:53,527 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 18:43:53,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:53,527 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 18:43:53,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:53,527 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 18:43:53,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:53,528 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:53,528 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:53,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:53,730 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:53,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:53,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-04-17 18:43:53,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:53,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449650466] [2020-04-17 18:43:53,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:53,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449650466] [2020-04-17 18:43:53,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984448193] [2020-04-17 18:43:53,794 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:53,834 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:53,835 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:53,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:53,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:53,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:53,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870614001] [2020-04-17 18:43:53,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:53,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:53,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:53,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:53,925 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:54,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:54,188 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-04-17 18:43:54,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:54,189 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:54,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:54,190 INFO L225 Difference]: With dead ends: 191 [2020-04-17 18:43:54,190 INFO L226 Difference]: Without dead ends: 186 [2020-04-17 18:43:54,190 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-04-17 18:43:54,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-04-17 18:43:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 18:43:54,195 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 18:43:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:54,195 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 18:43:54,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 18:43:54,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:54,195 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:54,195 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:54,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:54,399 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:54,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-04-17 18:43:54,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:54,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302768831] [2020-04-17 18:43:54,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:54,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302768831] [2020-04-17 18:43:54,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714504603] [2020-04-17 18:43:54,469 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:54,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:54,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:54,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:54,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:54,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:54,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:54,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:54,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911522047] [2020-04-17 18:43:54,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:54,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:54,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:54,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:54,625 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:55,148 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-04-17 18:43:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:43:55,148 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:55,149 INFO L225 Difference]: With dead ends: 232 [2020-04-17 18:43:55,149 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 18:43:55,150 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 18:43:55,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-04-17 18:43:55,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 18:43:55,153 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 18:43:55,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:55,153 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 18:43:55,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:55,153 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 18:43:55,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:55,160 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:55,160 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:55,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:55,361 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:55,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:55,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-04-17 18:43:55,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:55,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980121638] [2020-04-17 18:43:55,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:55,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980121638] [2020-04-17 18:43:55,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692509362] [2020-04-17 18:43:55,441 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:55,480 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:55,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:55,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:55,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:55,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:55,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:55,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625860643] [2020-04-17 18:43:55,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:55,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:55,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:55,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:55,601 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 18:43:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:56,066 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-04-17 18:43:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:43:56,067 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:56,068 INFO L225 Difference]: With dead ends: 222 [2020-04-17 18:43:56,068 INFO L226 Difference]: Without dead ends: 220 [2020-04-17 18:43:56,068 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-04-17 18:43:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-04-17 18:43:56,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 18:43:56,072 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 18:43:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:56,072 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 18:43:56,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:56,072 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 18:43:56,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:56,073 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:56,073 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:56,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:56,273 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:56,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-04-17 18:43:56,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:56,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991992645] [2020-04-17 18:43:56,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:56,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991992645] [2020-04-17 18:43:56,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758639340] [2020-04-17 18:43:56,340 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:56,386 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:56,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:56,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:56,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:56,929 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_325 Int)) (and (<= c_~i~0 (+ v_~i~0_325 c_~j~0)) (<= (div (+ (* v_~i~0_325 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~i~0_325 2)))) is different from true [2020-04-17 18:43:56,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:56,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:56,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:56,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421883473] [2020-04-17 18:43:56,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:56,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:56,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:56,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=124, Unknown=1, NotChecked=24, Total=210 [2020-04-17 18:43:56,945 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:57,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:57,707 INFO L93 Difference]: Finished difference Result 240 states and 583 transitions. [2020-04-17 18:43:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:43:57,708 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:57,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:57,709 INFO L225 Difference]: With dead ends: 240 [2020-04-17 18:43:57,709 INFO L226 Difference]: Without dead ends: 235 [2020-04-17 18:43:57,709 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=310, Invalid=685, Unknown=1, NotChecked=60, Total=1056 [2020-04-17 18:43:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-04-17 18:43:57,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 146. [2020-04-17 18:43:57,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 18:43:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-04-17 18:43:57,714 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-04-17 18:43:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:57,714 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-04-17 18:43:57,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-04-17 18:43:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:57,715 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:57,715 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:57,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:57,919 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:57,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-04-17 18:43:57,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:57,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542521533] [2020-04-17 18:43:57,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:57,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542521533] [2020-04-17 18:43:57,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99454048] [2020-04-17 18:43:57,994 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:58,036 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:58,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:58,038 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:58,038 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:58,121 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:58,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:58,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:43:58,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220060483] [2020-04-17 18:43:58,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:43:58,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:58,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:43:58,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 18:43:58,576 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 16 states. [2020-04-17 18:44:00,023 WARN L192 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-17 18:44:04,143 WARN L192 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-04-17 18:44:08,367 WARN L192 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-04-17 18:44:11,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:11,277 INFO L93 Difference]: Finished difference Result 261 states and 609 transitions. [2020-04-17 18:44:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 18:44:11,278 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 18:44:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:11,279 INFO L225 Difference]: With dead ends: 261 [2020-04-17 18:44:11,279 INFO L226 Difference]: Without dead ends: 253 [2020-04-17 18:44:11,280 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=451, Invalid=1101, Unknown=8, NotChecked=0, Total=1560 [2020-04-17 18:44:11,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-04-17 18:44:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 139. [2020-04-17 18:44:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:44:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-04-17 18:44:11,284 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-04-17 18:44:11,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:11,284 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-04-17 18:44:11,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:44:11,285 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-04-17 18:44:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:11,285 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:11,285 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:11,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:11,489 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:11,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-04-17 18:44:11,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:11,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529560829] [2020-04-17 18:44:11,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:11,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529560829] [2020-04-17 18:44:11,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673097568] [2020-04-17 18:44:11,552 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:11,594 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:44:11,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:11,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:44:11,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:11,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:11,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:44:11,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469026150] [2020-04-17 18:44:11,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:44:11,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:11,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:44:11,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:44:11,696 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-04-17 18:44:12,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:12,043 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-04-17 18:44:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:44:12,044 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:44:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:12,045 INFO L225 Difference]: With dead ends: 208 [2020-04-17 18:44:12,045 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 18:44:12,045 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:44:12,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 18:44:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-04-17 18:44:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:44:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-04-17 18:44:12,048 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-04-17 18:44:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:12,049 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-04-17 18:44:12,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:44:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-04-17 18:44:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:12,049 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:12,049 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:12,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:12,250 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:12,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:12,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-04-17 18:44:12,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:12,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815841613] [2020-04-17 18:44:12,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:12,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815841613] [2020-04-17 18:44:12,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944684208] [2020-04-17 18:44:12,326 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:12,368 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:44:12,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:12,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:12,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:44:12,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6664148] [2020-04-17 18:44:12,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:44:12,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:12,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:44:12,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:44:12,460 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-04-17 18:44:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:12,913 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-04-17 18:44:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:44:12,914 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:44:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:12,915 INFO L225 Difference]: With dead ends: 215 [2020-04-17 18:44:12,915 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 18:44:12,915 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:44:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 18:44:12,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-04-17 18:44:12,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 18:44:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 18:44:12,919 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 18:44:12,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:12,919 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 18:44:12,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:44:12,919 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 18:44:12,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:12,920 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:12,920 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:13,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:13,123 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:13,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-04-17 18:44:13,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:13,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825755584] [2020-04-17 18:44:13,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:13,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825755584] [2020-04-17 18:44:13,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735600943] [2020-04-17 18:44:13,192 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:13,235 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:44:13,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:13,236 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:44:13,237 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:13,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:44:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:13,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:13,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:44:13,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557371625] [2020-04-17 18:44:13,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:44:13,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:13,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:44:13,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:44:13,322 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 18:44:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:13,809 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-04-17 18:44:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:44:13,810 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:44:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:13,811 INFO L225 Difference]: With dead ends: 236 [2020-04-17 18:44:13,811 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 18:44:13,811 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:44:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 18:44:13,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-04-17 18:44:13,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 18:44:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 18:44:13,815 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 18:44:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:13,815 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 18:44:13,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:44:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 18:44:13,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:13,816 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:13,816 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:14,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:14,017 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:14,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-04-17 18:44:14,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:14,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437714002] [2020-04-17 18:44:14,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:14,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437714002] [2020-04-17 18:44:14,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579710150] [2020-04-17 18:44:14,087 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:14,129 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:44:14,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:14,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:44:14,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:14,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:44:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:14,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:14,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:44:14,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723355288] [2020-04-17 18:44:14,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:44:14,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:14,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:44:14,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:44:14,215 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 18:44:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:14,748 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-04-17 18:44:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:44:14,748 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:44:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:14,749 INFO L225 Difference]: With dead ends: 241 [2020-04-17 18:44:14,749 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 18:44:14,750 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:44:14,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 18:44:14,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-04-17 18:44:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-04-17 18:44:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-04-17 18:44:14,753 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-04-17 18:44:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:14,753 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-04-17 18:44:14,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:44:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-04-17 18:44:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:14,754 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:14,754 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:14,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:14,957 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:14,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:14,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-04-17 18:44:14,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:14,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640697371] [2020-04-17 18:44:14,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:15,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640697371] [2020-04-17 18:44:15,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232090116] [2020-04-17 18:44:15,024 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:15,066 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:15,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:15,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:44:15,067 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:15,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:44:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:15,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:15,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:44:15,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838961709] [2020-04-17 18:44:15,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:44:15,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:15,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:44:15,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:44:15,159 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-04-17 18:44:15,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:15,648 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-04-17 18:44:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:44:15,649 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:44:15,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:15,650 INFO L225 Difference]: With dead ends: 232 [2020-04-17 18:44:15,650 INFO L226 Difference]: Without dead ends: 224 [2020-04-17 18:44:15,650 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:44:15,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-04-17 18:44:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-04-17 18:44:15,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 18:44:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-04-17 18:44:15,654 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-04-17 18:44:15,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:15,655 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-04-17 18:44:15,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:44:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-04-17 18:44:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:15,655 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:15,655 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:15,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:15,856 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:15,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-04-17 18:44:15,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:15,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415117361] [2020-04-17 18:44:15,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:15,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415117361] [2020-04-17 18:44:15,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866042904] [2020-04-17 18:44:15,952 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:15,992 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:44:15,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:15,993 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:15,994 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:16,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:44:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:16,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:16,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:44:16,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349058892] [2020-04-17 18:44:16,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:44:16,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:16,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:44:16,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:44:16,179 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-04-17 18:44:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:16,488 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-04-17 18:44:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:44:16,488 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-04-17 18:44:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:16,489 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:44:16,490 INFO L226 Difference]: Without dead ends: 180 [2020-04-17 18:44:16,490 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:44:16,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-04-17 18:44:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-04-17 18:44:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:44:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-04-17 18:44:16,494 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-04-17 18:44:16,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:16,495 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-04-17 18:44:16,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:44:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-04-17 18:44:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:16,496 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:16,496 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:16,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:16,700 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:16,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:16,701 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-04-17 18:44:16,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:16,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951093954] [2020-04-17 18:44:16,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:16,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951093954] [2020-04-17 18:44:16,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670396859] [2020-04-17 18:44:16,922 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:16,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:44:17,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:17,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:17,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:17,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:17,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:17,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978161642] [2020-04-17 18:44:17,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:17,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:17,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:17,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:17,233 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-04-17 18:44:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:17,277 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-04-17 18:44:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:44:17,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:44:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:17,279 INFO L225 Difference]: With dead ends: 180 [2020-04-17 18:44:17,279 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 18:44:17,280 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:17,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 18:44:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-04-17 18:44:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 18:44:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-04-17 18:44:17,284 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-04-17 18:44:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:17,285 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-04-17 18:44:17,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-04-17 18:44:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:17,286 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:17,286 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:17,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:17,490 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:17,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-04-17 18:44:17,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:17,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037144177] [2020-04-17 18:44:17,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:17,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037144177] [2020-04-17 18:44:17,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13738571] [2020-04-17 18:44:17,612 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:17,651 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:17,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:17,652 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:17,653 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:17,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:17,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:17,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399649205] [2020-04-17 18:44:17,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:17,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:17,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:17,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:17,779 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-04-17 18:44:17,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:17,855 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-04-17 18:44:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:44:17,856 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:44:17,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:17,857 INFO L225 Difference]: With dead ends: 197 [2020-04-17 18:44:17,857 INFO L226 Difference]: Without dead ends: 194 [2020-04-17 18:44:17,857 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:44:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-04-17 18:44:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-04-17 18:44:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 18:44:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-04-17 18:44:17,861 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-04-17 18:44:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:17,861 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-04-17 18:44:17,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-04-17 18:44:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:17,862 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:17,862 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:18,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:18,063 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:18,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-04-17 18:44:18,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:18,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158611608] [2020-04-17 18:44:18,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:18,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158611608] [2020-04-17 18:44:18,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983176398] [2020-04-17 18:44:18,202 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:18,265 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 18:44:18,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:18,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:18,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:18,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:18,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:18,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022050497] [2020-04-17 18:44:18,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:18,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:18,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:18,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:18,411 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-04-17 18:44:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:18,510 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-04-17 18:44:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:44:18,511 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:44:18,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:18,512 INFO L225 Difference]: With dead ends: 196 [2020-04-17 18:44:18,512 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 18:44:18,512 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:44:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 18:44:18,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-04-17 18:44:18,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-04-17 18:44:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-04-17 18:44:18,515 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-04-17 18:44:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:18,515 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-04-17 18:44:18,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-04-17 18:44:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:18,516 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:18,516 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:18,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:18,717 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:18,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-04-17 18:44:18,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:18,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786288166] [2020-04-17 18:44:18,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:18,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786288166] [2020-04-17 18:44:18,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597305496] [2020-04-17 18:44:18,828 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:18,870 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:44:18,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:18,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:18,871 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:18,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:18,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:18,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106350963] [2020-04-17 18:44:19,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:19,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:19,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:19,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:19,000 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-04-17 18:44:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:19,127 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-04-17 18:44:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:44:19,128 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:44:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:19,129 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:44:19,129 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 18:44:19,129 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:44:19,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 18:44:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-04-17 18:44:19,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-04-17 18:44:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-04-17 18:44:19,132 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-04-17 18:44:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:19,132 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-04-17 18:44:19,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:19,132 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-04-17 18:44:19,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:19,133 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:19,133 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:19,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:19,333 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:19,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-04-17 18:44:19,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:19,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145971779] [2020-04-17 18:44:19,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:19,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145971779] [2020-04-17 18:44:19,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340367951] [2020-04-17 18:44:19,431 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:19,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:19,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:19,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:19,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:19,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688661964] [2020-04-17 18:44:19,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:19,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:19,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:19,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:19,601 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-04-17 18:44:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:19,749 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-04-17 18:44:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:44:19,750 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:44:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:19,751 INFO L225 Difference]: With dead ends: 194 [2020-04-17 18:44:19,751 INFO L226 Difference]: Without dead ends: 191 [2020-04-17 18:44:19,751 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:44:19,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-04-17 18:44:19,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-04-17 18:44:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-04-17 18:44:19,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-04-17 18:44:19,756 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-04-17 18:44:19,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:19,756 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-04-17 18:44:19,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:19,756 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-04-17 18:44:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:19,757 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:19,757 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:19,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:19,960 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:19,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:19,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-04-17 18:44:19,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:19,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569819153] [2020-04-17 18:44:19,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:20,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569819153] [2020-04-17 18:44:20,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071784887] [2020-04-17 18:44:20,051 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:20,098 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:44:20,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:20,099 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:20,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:20,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:20,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:20,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127304541] [2020-04-17 18:44:20,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:20,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:20,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:20,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:20,242 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-04-17 18:44:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:20,426 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-04-17 18:44:20,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:44:20,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:44:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:20,428 INFO L225 Difference]: With dead ends: 193 [2020-04-17 18:44:20,428 INFO L226 Difference]: Without dead ends: 190 [2020-04-17 18:44:20,428 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:44:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-04-17 18:44:20,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-04-17 18:44:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-04-17 18:44:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-04-17 18:44:20,431 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-04-17 18:44:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:20,431 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-04-17 18:44:20,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-04-17 18:44:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:20,432 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:20,432 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:20,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:20,633 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:20,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:20,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-04-17 18:44:20,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:20,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433381225] [2020-04-17 18:44:20,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:20,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433381225] [2020-04-17 18:44:20,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168355873] [2020-04-17 18:44:20,722 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:20,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:44:20,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:20,766 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:20,766 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:20,879 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:44:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:20,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:20,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:20,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953680480] [2020-04-17 18:44:20,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:20,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:20,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:20,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:20,890 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-04-17 18:44:21,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:21,155 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-04-17 18:44:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:44:21,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:44:21,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:21,157 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:44:21,157 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 18:44:21,157 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 18:44:21,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-04-17 18:44:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-04-17 18:44:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-04-17 18:44:21,162 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-04-17 18:44:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:21,162 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-04-17 18:44:21,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:21,162 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-04-17 18:44:21,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:21,163 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:21,163 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:21,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:21,366 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:21,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-04-17 18:44:21,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:21,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691175777] [2020-04-17 18:44:21,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:21,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691175777] [2020-04-17 18:44:21,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153475826] [2020-04-17 18:44:21,466 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:21,508 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:44:21,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:21,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:21,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:21,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:21,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:21,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625904433] [2020-04-17 18:44:21,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:21,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:21,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:21,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:21,654 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-04-17 18:44:21,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:21,713 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-04-17 18:44:21,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:44:21,713 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:21,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:21,714 INFO L225 Difference]: With dead ends: 188 [2020-04-17 18:44:21,714 INFO L226 Difference]: Without dead ends: 186 [2020-04-17 18:44:21,715 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:21,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-04-17 18:44:21,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-04-17 18:44:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-04-17 18:44:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-04-17 18:44:21,718 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-04-17 18:44:21,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:21,718 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-04-17 18:44:21,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:21,718 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-04-17 18:44:21,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:21,718 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:21,719 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:21,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:21,919 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:21,920 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-04-17 18:44:21,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:21,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053570588] [2020-04-17 18:44:21,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:22,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053570588] [2020-04-17 18:44:22,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491925008] [2020-04-17 18:44:22,014 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:22,058 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:44:22,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:22,059 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:22,060 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:22,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:22,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:22,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478378972] [2020-04-17 18:44:22,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:22,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:22,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:22,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:22,206 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-04-17 18:44:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:22,407 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-04-17 18:44:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:44:22,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:22,408 INFO L225 Difference]: With dead ends: 199 [2020-04-17 18:44:22,408 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 18:44:22,409 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:44:22,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 18:44:22,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-04-17 18:44:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-04-17 18:44:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-04-17 18:44:22,412 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-04-17 18:44:22,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:22,412 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-04-17 18:44:22,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-04-17 18:44:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:22,413 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:22,413 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:22,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:22,614 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:22,614 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-04-17 18:44:22,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:22,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985417828] [2020-04-17 18:44:22,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:22,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985417828] [2020-04-17 18:44:22,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937807089] [2020-04-17 18:44:22,725 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:22,782 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:22,783 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:23,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:23,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:23,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955522416] [2020-04-17 18:44:23,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:23,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:23,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:23,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:23,936 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-04-17 18:44:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:24,430 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-04-17 18:44:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:44:24,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:24,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:24,432 INFO L225 Difference]: With dead ends: 210 [2020-04-17 18:44:24,432 INFO L226 Difference]: Without dead ends: 208 [2020-04-17 18:44:24,432 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:44:24,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-04-17 18:44:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-04-17 18:44:24,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-04-17 18:44:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-04-17 18:44:24,436 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-04-17 18:44:24,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:24,436 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-04-17 18:44:24,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-04-17 18:44:24,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:24,436 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:24,436 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:24,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:24,637 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:24,638 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-04-17 18:44:24,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:24,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803632946] [2020-04-17 18:44:24,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:24,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803632946] [2020-04-17 18:44:24,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179958165] [2020-04-17 18:44:24,748 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:24,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:44:24,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:24,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:24,793 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:26,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:26,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:26,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270337950] [2020-04-17 18:44:26,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:26,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:26,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:26,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:26,753 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-04-17 18:44:27,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:27,114 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-04-17 18:44:27,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:44:27,115 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:27,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:27,116 INFO L225 Difference]: With dead ends: 210 [2020-04-17 18:44:27,116 INFO L226 Difference]: Without dead ends: 208 [2020-04-17 18:44:27,116 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:27,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-04-17 18:44:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-04-17 18:44:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-04-17 18:44:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-04-17 18:44:27,120 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-04-17 18:44:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:27,121 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-04-17 18:44:27,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-04-17 18:44:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:27,121 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:27,121 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:27,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:27,324 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:27,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:27,325 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-04-17 18:44:27,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:27,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276525926] [2020-04-17 18:44:27,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:27,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276525926] [2020-04-17 18:44:27,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696473671] [2020-04-17 18:44:27,441 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:27,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:44:27,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:27,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:27,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:27,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:27,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:27,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415699316] [2020-04-17 18:44:27,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:27,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:27,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:27,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:27,815 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-04-17 18:44:28,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:28,303 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-04-17 18:44:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:44:28,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:28,305 INFO L225 Difference]: With dead ends: 218 [2020-04-17 18:44:28,305 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 18:44:28,305 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:28,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 18:44:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-04-17 18:44:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 18:44:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 18:44:28,310 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 18:44:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:28,311 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 18:44:28,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 18:44:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:28,312 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:28,312 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:28,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:28,517 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:28,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-04-17 18:44:28,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:28,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317212753] [2020-04-17 18:44:28,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:28,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317212753] [2020-04-17 18:44:28,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688648784] [2020-04-17 18:44:28,640 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:28,685 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:28,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:28,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:28,686 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:39,033 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-17 18:44:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:39,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:39,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:44:39,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641575754] [2020-04-17 18:44:39,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:44:39,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:39,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:44:39,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=206, Unknown=4, NotChecked=0, Total=306 [2020-04-17 18:44:39,036 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 18 states. [2020-04-17 18:44:41,465 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 18:44:45,747 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 29 [2020-04-17 18:44:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:49,795 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-04-17 18:44:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:44:49,796 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:44:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:49,797 INFO L225 Difference]: With dead ends: 218 [2020-04-17 18:44:49,797 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 18:44:49,797 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=209, Invalid=387, Unknown=4, NotChecked=0, Total=600 [2020-04-17 18:44:49,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 18:44:49,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 153. [2020-04-17 18:44:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-04-17 18:44:49,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-04-17 18:44:49,802 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-04-17 18:44:49,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:49,802 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-04-17 18:44:49,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:44:49,802 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-04-17 18:44:49,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:49,803 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:49,803 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:50,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:50,006 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:50,006 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-04-17 18:44:50,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:50,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647841090] [2020-04-17 18:44:50,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:50,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647841090] [2020-04-17 18:44:50,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695352515] [2020-04-17 18:44:50,105 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:50,142 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:44:50,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:50,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:50,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:50,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:50,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:50,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980130730] [2020-04-17 18:44:50,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:50,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:50,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:50,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:50,277 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-04-17 18:44:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:50,541 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-04-17 18:44:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:44:50,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:50,543 INFO L225 Difference]: With dead ends: 212 [2020-04-17 18:44:50,543 INFO L226 Difference]: Without dead ends: 210 [2020-04-17 18:44:50,543 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:44:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-04-17 18:44:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-04-17 18:44:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 18:44:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 18:44:50,547 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 18:44:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:50,547 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 18:44:50,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 18:44:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:50,548 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:50,548 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:50,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:50,751 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:50,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:50,752 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-04-17 18:44:50,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:50,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976985983] [2020-04-17 18:44:50,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:50,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976985983] [2020-04-17 18:44:50,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783244430] [2020-04-17 18:44:50,841 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:50,884 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:44:50,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:50,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:50,885 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:51,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:51,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:51,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41277585] [2020-04-17 18:44:51,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:51,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:51,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:51,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:51,388 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 18:44:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:51,718 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-04-17 18:44:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:51,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:51,719 INFO L225 Difference]: With dead ends: 224 [2020-04-17 18:44:51,719 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 18:44:51,720 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:44:51,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 18:44:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-04-17 18:44:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 18:44:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 18:44:51,723 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 18:44:51,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:51,724 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 18:44:51,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:51,724 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 18:44:51,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:51,724 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:51,724 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:51,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:51,927 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:51,928 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-04-17 18:44:51,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:51,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366981965] [2020-04-17 18:44:51,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:52,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366981965] [2020-04-17 18:44:52,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043838625] [2020-04-17 18:44:52,049 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:52,117 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:52,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:52,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:52,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:52,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437818969] [2020-04-17 18:44:52,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:52,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:52,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:52,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:52,328 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 18:44:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:52,711 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-04-17 18:44:52,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:52,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:52,713 INFO L225 Difference]: With dead ends: 218 [2020-04-17 18:44:52,713 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 18:44:52,713 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:44:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 18:44:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-04-17 18:44:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 18:44:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 18:44:52,718 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 18:44:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:52,719 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 18:44:52,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 18:44:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:52,720 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:52,720 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:52,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:52,924 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:52,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:52,924 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-04-17 18:44:52,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:52,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955397798] [2020-04-17 18:44:52,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:53,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955397798] [2020-04-17 18:44:53,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323403142] [2020-04-17 18:44:53,023 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:53,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:44:53,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:53,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:53,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:53,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:53,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:53,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306955401] [2020-04-17 18:44:53,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:53,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:53,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:53,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:53,206 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 18:44:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:53,437 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-04-17 18:44:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:44:53,438 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:53,439 INFO L225 Difference]: With dead ends: 206 [2020-04-17 18:44:53,439 INFO L226 Difference]: Without dead ends: 204 [2020-04-17 18:44:53,439 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:53,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-04-17 18:44:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-04-17 18:44:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-04-17 18:44:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-04-17 18:44:53,444 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-04-17 18:44:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:53,444 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-04-17 18:44:53,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-04-17 18:44:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:53,444 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:53,444 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:53,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:53,645 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-04-17 18:44:53,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:53,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999844747] [2020-04-17 18:44:53,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:53,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999844747] [2020-04-17 18:44:53,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016784099] [2020-04-17 18:44:53,747 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:53,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:44:53,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:53,791 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:53,792 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:53,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:53,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:53,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983734752] [2020-04-17 18:44:53,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:53,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:53,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:53,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:53,918 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-04-17 18:44:54,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:54,174 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-04-17 18:44:54,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:44:54,174 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:54,175 INFO L225 Difference]: With dead ends: 207 [2020-04-17 18:44:54,175 INFO L226 Difference]: Without dead ends: 205 [2020-04-17 18:44:54,176 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-04-17 18:44:54,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-04-17 18:44:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-04-17 18:44:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-04-17 18:44:54,180 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-04-17 18:44:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:54,180 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-04-17 18:44:54,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:54,180 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-04-17 18:44:54,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:54,181 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:54,181 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:54,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:54,384 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:54,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:54,384 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-04-17 18:44:54,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:54,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626271391] [2020-04-17 18:44:54,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:54,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626271391] [2020-04-17 18:44:54,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398228805] [2020-04-17 18:44:54,486 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:54,536 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:54,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:54,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:54,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:55,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:55,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:55,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426256596] [2020-04-17 18:44:55,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:55,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:55,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:55,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:55,448 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-04-17 18:44:55,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:55,699 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-04-17 18:44:55,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:44:55,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:55,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:55,700 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:44:55,701 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 18:44:55,701 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:55,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 18:44:55,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-04-17 18:44:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-04-17 18:44:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-04-17 18:44:55,705 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-04-17 18:44:55,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:55,705 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-04-17 18:44:55,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:55,706 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-04-17 18:44:55,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:55,706 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:55,706 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:55,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:55,909 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:55,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:55,910 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-04-17 18:44:55,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:55,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985243322] [2020-04-17 18:44:55,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:56,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985243322] [2020-04-17 18:44:56,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78085027] [2020-04-17 18:44:56,007 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:56,049 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:44:56,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:56,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:56,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:06,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:06,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:06,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080794271] [2020-04-17 18:45:06,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:06,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:06,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:06,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=190, Unknown=1, NotChecked=0, Total=272 [2020-04-17 18:45:06,614 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-04-17 18:45:07,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:07,963 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-04-17 18:45:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:45:07,964 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:07,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:07,964 INFO L225 Difference]: With dead ends: 223 [2020-04-17 18:45:07,965 INFO L226 Difference]: Without dead ends: 221 [2020-04-17 18:45:07,965 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=197, Invalid=401, Unknown=2, NotChecked=0, Total=600 [2020-04-17 18:45:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-04-17 18:45:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-04-17 18:45:07,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 18:45:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-04-17 18:45:07,969 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-04-17 18:45:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:07,969 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-04-17 18:45:07,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-04-17 18:45:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:07,970 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:07,970 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:08,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:08,173 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:08,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:08,173 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-04-17 18:45:08,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:08,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058735869] [2020-04-17 18:45:08,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:08,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058735869] [2020-04-17 18:45:08,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263630698] [2020-04-17 18:45:08,266 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:08,306 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:45:08,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:08,307 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:08,307 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:08,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:08,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:08,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523064436] [2020-04-17 18:45:08,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:08,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:08,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:08,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:08,428 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-04-17 18:45:08,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:08,695 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-04-17 18:45:08,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:45:08,696 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:08,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:08,697 INFO L225 Difference]: With dead ends: 225 [2020-04-17 18:45:08,697 INFO L226 Difference]: Without dead ends: 223 [2020-04-17 18:45:08,697 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:45:08,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-04-17 18:45:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-04-17 18:45:08,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-04-17 18:45:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-04-17 18:45:08,701 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-04-17 18:45:08,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:08,701 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-04-17 18:45:08,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-04-17 18:45:08,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:08,702 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:08,702 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:08,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:08,903 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:08,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-04-17 18:45:08,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:08,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322714774] [2020-04-17 18:45:08,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:09,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322714774] [2020-04-17 18:45:09,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613756568] [2020-04-17 18:45:09,007 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:09,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:09,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:09,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:09,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:09,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568049451] [2020-04-17 18:45:09,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:09,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:09,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:09,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:09,189 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-04-17 18:45:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:09,464 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-04-17 18:45:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:45:09,465 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:09,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:09,466 INFO L225 Difference]: With dead ends: 214 [2020-04-17 18:45:09,466 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 18:45:09,466 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:45:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 18:45:09,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-04-17 18:45:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-04-17 18:45:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-04-17 18:45:09,470 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-04-17 18:45:09,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:09,470 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-04-17 18:45:09,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:09,470 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-04-17 18:45:09,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:09,471 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:09,471 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:09,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:09,675 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:09,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:09,675 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-04-17 18:45:09,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:09,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32115671] [2020-04-17 18:45:09,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:09,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32115671] [2020-04-17 18:45:09,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284105056] [2020-04-17 18:45:09,799 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:09,837 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:45:09,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:09,838 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:09,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:09,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:09,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:09,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526566241] [2020-04-17 18:45:09,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:09,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:09,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:09,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:09,980 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-04-17 18:45:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:10,164 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-04-17 18:45:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:45:10,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:10,165 INFO L225 Difference]: With dead ends: 203 [2020-04-17 18:45:10,165 INFO L226 Difference]: Without dead ends: 201 [2020-04-17 18:45:10,165 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:45:10,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-04-17 18:45:10,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-04-17 18:45:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-04-17 18:45:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-04-17 18:45:10,173 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-04-17 18:45:10,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:10,173 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-04-17 18:45:10,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:10,173 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-04-17 18:45:10,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:10,173 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:10,173 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:10,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:10,374 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:10,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:10,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-04-17 18:45:10,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:10,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160044439] [2020-04-17 18:45:10,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:10,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160044439] [2020-04-17 18:45:10,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303161542] [2020-04-17 18:45:10,513 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:10,553 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:45:10,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:10,554 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:10,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:10,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:10,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:10,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725142973] [2020-04-17 18:45:10,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:10,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:10,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:10,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:10,683 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-04-17 18:45:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:10,764 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-04-17 18:45:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:45:10,765 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:10,766 INFO L225 Difference]: With dead ends: 212 [2020-04-17 18:45:10,766 INFO L226 Difference]: Without dead ends: 210 [2020-04-17 18:45:10,766 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:45:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-04-17 18:45:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-04-17 18:45:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-04-17 18:45:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-04-17 18:45:10,770 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-04-17 18:45:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:10,770 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-04-17 18:45:10,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:10,770 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-04-17 18:45:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:10,770 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:10,770 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:10,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:10,971 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:10,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-04-17 18:45:10,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:10,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557955992] [2020-04-17 18:45:10,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:11,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557955992] [2020-04-17 18:45:11,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713095280] [2020-04-17 18:45:11,100 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:11,145 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:45:11,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:11,146 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:11,146 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:11,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:11,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:11,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891770909] [2020-04-17 18:45:11,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:11,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:11,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:11,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:11,339 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-04-17 18:45:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:11,546 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-04-17 18:45:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:45:11,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:11,548 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:45:11,548 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 18:45:11,548 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:45:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 18:45:11,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-04-17 18:45:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-04-17 18:45:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-04-17 18:45:11,552 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-04-17 18:45:11,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:11,552 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-04-17 18:45:11,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-04-17 18:45:11,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:11,552 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:11,552 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:11,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:11,753 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:11,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:11,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-04-17 18:45:11,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:11,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041701041] [2020-04-17 18:45:11,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:11,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041701041] [2020-04-17 18:45:11,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182223486] [2020-04-17 18:45:11,869 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:11,935 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:45:11,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:11,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:11,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:20,918 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 18:45:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:20,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:20,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:45:20,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627463806] [2020-04-17 18:45:20,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:45:20,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:20,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:45:20,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=216, Unknown=3, NotChecked=0, Total=306 [2020-04-17 18:45:20,920 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 18 states. [2020-04-17 18:45:23,169 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 18:45:29,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:29,049 INFO L93 Difference]: Finished difference Result 237 states and 555 transitions. [2020-04-17 18:45:29,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:45:29,049 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:45:29,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:29,050 INFO L225 Difference]: With dead ends: 237 [2020-04-17 18:45:29,050 INFO L226 Difference]: Without dead ends: 235 [2020-04-17 18:45:29,050 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=198, Invalid=399, Unknown=3, NotChecked=0, Total=600 [2020-04-17 18:45:29,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-04-17 18:45:29,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 162. [2020-04-17 18:45:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 18:45:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-04-17 18:45:29,054 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-04-17 18:45:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:29,054 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-04-17 18:45:29,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:45:29,054 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-04-17 18:45:29,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:29,054 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:29,054 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:29,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:29,255 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:29,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:29,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-04-17 18:45:29,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:29,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568768073] [2020-04-17 18:45:29,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:29,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568768073] [2020-04-17 18:45:29,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81686970] [2020-04-17 18:45:29,352 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:29,396 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:45:29,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:29,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:29,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:39,691 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 18:45:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:39,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:39,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:45:39,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458357164] [2020-04-17 18:45:39,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:45:39,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:39,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:45:39,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=218, Unknown=4, NotChecked=0, Total=306 [2020-04-17 18:45:39,693 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 18 states. [2020-04-17 18:45:42,008 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 18:45:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:54,331 INFO L93 Difference]: Finished difference Result 235 states and 549 transitions. [2020-04-17 18:45:54,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:54,331 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:45:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:54,332 INFO L225 Difference]: With dead ends: 235 [2020-04-17 18:45:54,332 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 18:45:54,333 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=227, Invalid=471, Unknown=4, NotChecked=0, Total=702 [2020-04-17 18:45:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 18:45:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-04-17 18:45:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-04-17 18:45:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-04-17 18:45:54,336 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-04-17 18:45:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:54,336 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-04-17 18:45:54,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:45:54,336 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-04-17 18:45:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:54,337 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:54,337 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:54,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:54,539 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-04-17 18:45:54,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:54,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527391578] [2020-04-17 18:45:54,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:54,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527391578] [2020-04-17 18:45:54,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113785640] [2020-04-17 18:45:54,640 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:54,682 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:54,683 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:54,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:54,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:54,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742089488] [2020-04-17 18:45:54,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:54,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:54,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:54,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:54,865 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-04-17 18:45:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:55,218 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-04-17 18:45:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:55,218 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:55,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:55,219 INFO L225 Difference]: With dead ends: 237 [2020-04-17 18:45:55,219 INFO L226 Difference]: Without dead ends: 235 [2020-04-17 18:45:55,220 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:45:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-04-17 18:45:55,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-04-17 18:45:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:45:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-04-17 18:45:55,223 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-04-17 18:45:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:55,223 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-04-17 18:45:55,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-04-17 18:45:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:55,225 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:55,225 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:55,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:55,429 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:55,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-04-17 18:45:55,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:55,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622989420] [2020-04-17 18:45:55,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:55,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622989420] [2020-04-17 18:45:55,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875827918] [2020-04-17 18:45:55,524 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:55,566 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:45:55,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:55,566 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:55,567 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:55,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:55,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:55,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345553035] [2020-04-17 18:45:55,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:55,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:55,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:55,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:55,734 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-04-17 18:45:56,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:56,091 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-04-17 18:45:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:56,091 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:56,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:56,092 INFO L225 Difference]: With dead ends: 229 [2020-04-17 18:45:56,092 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 18:45:56,092 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:45:56,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 18:45:56,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-04-17 18:45:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-04-17 18:45:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-04-17 18:45:56,096 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-04-17 18:45:56,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:56,096 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-04-17 18:45:56,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:56,096 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-04-17 18:45:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:56,096 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:56,096 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:56,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:56,297 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:56,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-04-17 18:45:56,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:56,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854394141] [2020-04-17 18:45:56,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:56,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854394141] [2020-04-17 18:45:56,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040847482] [2020-04-17 18:45:56,387 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:56,427 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:45:56,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:56,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:56,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:56,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:56,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:56,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190279885] [2020-04-17 18:45:56,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:56,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:56,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:56,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:56,567 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-04-17 18:45:56,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:56,941 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-04-17 18:45:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:45:56,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:56,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:56,943 INFO L225 Difference]: With dead ends: 225 [2020-04-17 18:45:56,943 INFO L226 Difference]: Without dead ends: 223 [2020-04-17 18:45:56,943 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:45:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-04-17 18:45:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-04-17 18:45:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:45:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-04-17 18:45:56,947 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-04-17 18:45:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:56,947 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-04-17 18:45:56,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-04-17 18:45:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:56,948 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:56,948 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:57,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:57,149 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-04-17 18:45:57,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:57,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414820927] [2020-04-17 18:45:57,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:57,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414820927] [2020-04-17 18:45:57,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924795171] [2020-04-17 18:45:57,242 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:57,282 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:45:57,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:57,283 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:57,284 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:57,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:57,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:57,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718080576] [2020-04-17 18:45:57,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:57,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:57,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:57,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:57,929 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-04-17 18:45:58,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:58,308 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-04-17 18:45:58,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:45:58,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:58,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:58,309 INFO L225 Difference]: With dead ends: 239 [2020-04-17 18:45:58,309 INFO L226 Difference]: Without dead ends: 237 [2020-04-17 18:45:58,310 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:45:58,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-04-17 18:45:58,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-04-17 18:45:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:45:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-04-17 18:45:58,313 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-04-17 18:45:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:58,313 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-04-17 18:45:58,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-04-17 18:45:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:58,314 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:58,314 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:58,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:58,515 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:58,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:58,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-04-17 18:45:58,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:58,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875410211] [2020-04-17 18:45:58,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:58,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875410211] [2020-04-17 18:45:58,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110734012] [2020-04-17 18:45:58,601 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:58,642 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:45:58,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:58,644 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:58,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:58,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:58,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:58,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749093247] [2020-04-17 18:45:58,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:58,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:58,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:58,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:58,768 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-04-17 18:45:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:59,136 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-04-17 18:45:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:45:59,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:59,137 INFO L225 Difference]: With dead ends: 234 [2020-04-17 18:45:59,137 INFO L226 Difference]: Without dead ends: 232 [2020-04-17 18:45:59,138 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:45:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-04-17 18:45:59,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-04-17 18:45:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:45:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-04-17 18:45:59,143 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-04-17 18:45:59,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:59,144 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-04-17 18:45:59,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:59,144 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-04-17 18:45:59,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:59,144 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:59,145 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:59,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:59,349 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:59,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-04-17 18:45:59,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:59,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006843317] [2020-04-17 18:45:59,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:59,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006843317] [2020-04-17 18:45:59,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439511584] [2020-04-17 18:45:59,487 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:59,536 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:45:59,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:59,537 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:59,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:59,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:59,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:59,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845758215] [2020-04-17 18:45:59,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:59,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:59,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:59,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:59,690 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-04-17 18:45:59,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:59,964 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-04-17 18:45:59,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:59,964 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:59,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:59,965 INFO L225 Difference]: With dead ends: 218 [2020-04-17 18:45:59,965 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 18:45:59,965 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:45:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 18:45:59,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-04-17 18:45:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-04-17 18:45:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-04-17 18:45:59,968 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-04-17 18:45:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:59,968 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-04-17 18:45:59,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:59,968 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-04-17 18:45:59,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:59,968 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:59,969 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:00,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:00,169 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:00,170 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-04-17 18:46:00,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:00,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486641497] [2020-04-17 18:46:00,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:00,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486641497] [2020-04-17 18:46:00,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732136478] [2020-04-17 18:46:00,286 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:00,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:00,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:00,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:00,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:00,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228192621] [2020-04-17 18:46:00,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:00,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:00,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:00,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:00,475 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-04-17 18:46:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:00,584 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-04-17 18:46:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:00,585 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:00,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:00,585 INFO L225 Difference]: With dead ends: 208 [2020-04-17 18:46:00,586 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 18:46:00,586 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:46:00,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 18:46:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-04-17 18:46:00,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-04-17 18:46:00,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-04-17 18:46:00,590 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-04-17 18:46:00,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:00,590 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-04-17 18:46:00,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:00,590 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-04-17 18:46:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:00,590 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:00,591 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:00,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:00,791 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:00,792 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-04-17 18:46:00,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:00,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293928285] [2020-04-17 18:46:00,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:00,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293928285] [2020-04-17 18:46:00,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155852878] [2020-04-17 18:46:00,893 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:00,928 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:00,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:00,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:00,929 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:01,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:01,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:01,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420553185] [2020-04-17 18:46:01,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:01,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:01,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:01,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:01,063 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-04-17 18:46:01,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:01,293 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-04-17 18:46:01,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:01,294 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:01,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:01,295 INFO L225 Difference]: With dead ends: 229 [2020-04-17 18:46:01,295 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 18:46:01,295 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:46:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 18:46:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-04-17 18:46:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:46:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-04-17 18:46:01,303 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-04-17 18:46:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:01,304 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-04-17 18:46:01,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-04-17 18:46:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:01,304 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:01,304 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:01,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:01,505 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:01,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:01,506 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-04-17 18:46:01,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:01,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413713228] [2020-04-17 18:46:01,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:01,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413713228] [2020-04-17 18:46:01,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210522473] [2020-04-17 18:46:01,612 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:01,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:01,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:01,685 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:01,686 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:01,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:01,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:01,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786137092] [2020-04-17 18:46:01,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:01,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:01,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:01,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:01,950 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-04-17 18:46:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:02,288 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-04-17 18:46:02,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:02,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:02,289 INFO L225 Difference]: With dead ends: 235 [2020-04-17 18:46:02,289 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 18:46:02,289 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:46:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 18:46:02,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-04-17 18:46:02,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-04-17 18:46:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-04-17 18:46:02,300 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-04-17 18:46:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:02,300 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-04-17 18:46:02,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:02,301 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-04-17 18:46:02,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:02,301 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:02,301 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:02,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:02,502 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:02,502 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-04-17 18:46:02,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:02,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995927458] [2020-04-17 18:46:02,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:02,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995927458] [2020-04-17 18:46:02,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805517795] [2020-04-17 18:46:02,620 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:02,690 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:02,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:02,692 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:02,692 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:13,058 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 18:46:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:13,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:13,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:46:13,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680917003] [2020-04-17 18:46:13,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:46:13,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:13,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:46:13,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=229, Unknown=4, NotChecked=0, Total=306 [2020-04-17 18:46:13,060 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 18 states. [2020-04-17 18:46:15,359 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 18:46:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:26,705 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-04-17 18:46:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:26,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:46:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:26,706 INFO L225 Difference]: With dead ends: 241 [2020-04-17 18:46:26,706 INFO L226 Difference]: Without dead ends: 239 [2020-04-17 18:46:26,707 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=234, Invalid=518, Unknown=4, NotChecked=0, Total=756 [2020-04-17 18:46:26,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-04-17 18:46:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-04-17 18:46:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:46:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-04-17 18:46:26,710 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-04-17 18:46:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:26,710 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-04-17 18:46:26,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:46:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-04-17 18:46:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:26,710 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:26,710 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:26,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:26,911 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:26,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:26,912 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-04-17 18:46:26,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:26,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613869346] [2020-04-17 18:46:26,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:26,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613869346] [2020-04-17 18:46:26,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597527844] [2020-04-17 18:46:26,990 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:27,030 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:27,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:27,031 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:27,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2020-04-17 18:46:35,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:35,443 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 18:46:35,447 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 18:46:35,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 06:46:35 BasicIcfg [2020-04-17 18:46:35,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 18:46:35,449 INFO L168 Benchmark]: Toolchain (without parser) took 289725.37 ms. Allocated memory was 137.4 MB in the beginning and 187.2 MB in the end (delta: 49.8 MB). Free memory was 98.4 MB in the beginning and 86.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 61.5 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:35,449 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-04-17 18:46:35,449 INFO L168 Benchmark]: CACSL2BoogieTranslator took 671.15 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 96.6 MB in the beginning and 159.2 MB in the end (delta: -62.6 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:35,449 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.35 ms. Allocated memory is still 200.3 MB. Free memory was 159.2 MB in the beginning and 157.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:35,450 INFO L168 Benchmark]: Boogie Preprocessor took 25.94 ms. Allocated memory is still 200.3 MB. Free memory was 157.1 MB in the beginning and 155.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:35,450 INFO L168 Benchmark]: RCFGBuilder took 397.73 ms. Allocated memory is still 200.3 MB. Free memory was 155.7 MB in the beginning and 135.4 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:35,450 INFO L168 Benchmark]: TraceAbstraction took 288558.80 ms. Allocated memory was 200.3 MB in the beginning and 187.2 MB in the end (delta: -13.1 MB). Free memory was 135.4 MB in the beginning and 86.7 MB in the end (delta: 48.7 MB). Peak memory consumption was 35.6 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:35,452 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 671.15 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 96.6 MB in the beginning and 159.2 MB in the end (delta: -62.6 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.35 ms. Allocated memory is still 200.3 MB. Free memory was 159.2 MB in the beginning and 157.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.94 ms. Allocated memory is still 200.3 MB. Free memory was 157.1 MB in the beginning and 155.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 397.73 ms. Allocated memory is still 200.3 MB. Free memory was 155.7 MB in the beginning and 135.4 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 288558.80 ms. Allocated memory was 200.3 MB in the beginning and 187.2 MB in the end (delta: -13.1 MB). Free memory was 135.4 MB in the beginning and 86.7 MB in the end (delta: 48.7 MB). Peak memory consumption was 35.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 576 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 988 CheckedPairsTotal, 47 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 17 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 288.4s, OverallIterations: 177, TraceHistogramMax: 6, AutomataDifference: 122.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 2288 SDtfs, 15846 SDslu, 15487 SDs, 0 SdLazy, 11002 SolverSat, 3816 SolverUnsat, 35 SolverUnknown, 0 SolverNotchecked, 70.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4339 GetRequests, 816 SyntacticMatches, 153 SemanticMatches, 3370 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17073 ImplicationChecksByTransitivity, 156.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 176 MinimizatonAttempts, 8038 StatesRemovedByMinimization, 176 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 111.1s InterpolantComputationTime, 4278 NumberOfCodeBlocks, 4278 NumberOfCodeBlocksAsserted, 534 NumberOfCheckSat, 3934 ConstructedInterpolants, 39 QuantifiedInterpolants, 406650 SizeOfPredicates, 168 NumberOfNonLiveVariables, 14522 ConjunctsInSsa, 1630 ConjunctsInUnsatCore, 344 InterpolantComputations, 8 PerfectInterpolantSequences, 0/1644 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown